Mitsubishi Electric Lossnay series User manual

Y11-001 Jun.2012 <MEE>
TECHNICAL MANUAL FOR NORTH AMERICA
June.2012
Models Lossnay Unit
Lossnay Remote Controller
PZ-60DR-E
PZ-41SLB-E
PZ-52SF-E
LGH-F300RX5-E
LGH-F470RX5-E
LGH-F600RX5-E
LGH-F1200RX5-E

Y11-001 Jun.2012 <MEE>
TECHNICAL MANUAL FOR NORTH AMERICA
June.2012
Models Lossnay Unit
Lossnay Remote Controller
PZ-60DR-E
PZ-41SLB-E
PZ-52SF-E
LGH-F300RX5-E
LGH-F470RX5-E
LGH-F600RX5-E
LGH-F1200RX5-E

i
CONTENTS
Lossnay Unit
CHAPTER 1 Ventilation for Healthy Living
1. Necessity of Ventilation .................................................................................................................................... U-2
2. Ventilation Standards ....................................................................................................................................... U-3
3. Ventilation Method ............................................................................................................................................ U-4
4. Ventilation Performance .................................................................................................................................... U-7
5. Ventilation Load................................................................................................................................................. U-9
CHAPTER 2 Lossnay Construction and Technology
1. Construction and Features .............................................................................................................................. U-16
2. Lossnay Core Construction and Technology..................................................................................................... U-16
3. Total Energy Recovery Efficiency Calculation .................................................................................................. U-18
4. What is a Psychrometric Chart?........................................................................................................................ U-19
5. Lossnay Energy Recovery Calculation.............................................................................................................. U-20
CHAPTER 3 General Technical Considerations
1. Lossnay Energy Recovery Effect ...................................................................................................................... U-22
2. Calculating Lossnay Cost Savings .................................................................................................................... U-24
3. Psychrometric Chart ......................................................................................................................................... U-26
4. Determining Lossnay Core Resistance to Bacterial Cross-Contamination and Molds ..................................... U-28
5. Lossnay Core Fire : retardant property ............................................................................................................. U-30
6. Lossnay Core Sound Reducing Properties Test ............................................................................................... U-31
7. Changes in the Lossnay Core .......................................................................................................................... U-32
8. Comparing Energy Recovery Techniques ........................................................................................................ U-34
CHAPTER 4 Characteristics
1. How to Read the Characteristic Curves ........................................................................................................... U-38
2. Calculating Static Pressure Loss....................................................................................................................... U-38
3. How to Obtain Efficiency from Characteristic Curves ....................................................................................... U-41
4. Sound
............................................................................................................................................................... U-42
5. NC Curves ....................................................................................................................................................... U-48
CHAPTER 5 System Design Recommendations
1. Lossnay Operating Environment ...................................................................................................................... U-52
2. Sound Levels of Lossnay units with Built-in Fans ............................................................................................ U-53
3. Attaching Air Filters .......................................................................................................................................... U-53
4. Constructing the Ductwork ............................................................................................................................... U-53
5. Bypass Ventilation ............................................................................................................................................ U-53
6. Night purge function ......................................................................................................................................... U-53
7. Transmission Rate of Various Gases and Maximum Workplace Concentration Levels .................................... U-53
8. Solubility of Odors and Toxic Gases, etc., in Water and the Effect on the Lossnay Core ................................. U-54
9. Automatic Ventilation Switching......................................................................................................................... U-55
10. Alternate Installation for Lossnay ..................................................................................................................... U-56
11. Installing Supplementary Fan Devices ............................................................................................................. U-57

ii
CHAPTER 6 Examples of Lossnay Applications
1. Large Office Building ........................................................................................................................................ U-60
2. Small-Scale Urban Building ............................................................................................................................. U-64
3. Hospitals
.......................................................................................................................................................... U-65
4. Schools
............................................................................................................................................................ U-67
5. Convention Halls, Wedding Halls in Hotels ....................................................................................................... U-68
6. Public Halls (Facilities such as Day-care Centers) ............................................................................................. U-69
CHAPTER 7 Installation Considerations
1. LGH-Series Lossnay Ceiling Embedded-Type (LGH-RX5Series) .................................................................... U-72
CHAPTER 8 Filters
1. Importance of Filters ........................................................................................................................................ U-76
2. Dust
.................................................................................................................................................................. U-76
3. Calculation Table for Dust Collection Efficiency for Each Lossnay Filter ........................................................... U-77
4. Comparing Dust Collection Efficiency Measurement Methods ........................................................................ U-78
5. Calculating Dust Concentration Levels ............................................................................................................ U-80
CHAPTER 9 Service Life and Maintenance
1. Service Life ....................................................................................................................................................... U-82
2. Cleaning the Lossnay Core and Pre-lter ......................................................................................................... U-82
CHAPTER 10 Ventilation Standards in Each Country
1. Ventilation Standards in Each Country.............................................................................................................. U-86
2. United States of America................................................................................................................................... U-87
3. United Kingdom ................................................................................................................................................ U-87
CHAPTER 11 Lossnay Q and A ....................................................................................................................... U-90
Note: The word “LGH-F300 to 1200RX5-E” in this Lossnay Technical Manual expresses both the products for 50Hz area and
60Hz area, except for some parts where model name difference are written clearly.

iii
Lossnay Remote Controller
1. Summary..................................................................................................................................................................... C-3
2. Applicable Models ............................................................................................................................................... C-3
3. Terminology ............................................................................................................................................................. C-4
4. System Features and Examples
4.1 Features
......................................................................................................................................................... C-5
4.2 System Examples ........................................................................................................................................... C-6
4.3 System Selection ............................................................................................................................................ C-8
4.4 Basic System .................................................................................................................................................. C-11
4.5 Interlocking with M-Series or P-Series ........................................................................................................... C-13
4.6 Combining with City Multi ............................................................................................................................... C-14
5. Examples of Applications Using Various Input and Output Terminals
5.1 External Control Operating Mode Selection ................................................................................................... C-23
5.2 Delayed Interlocked Operation ........................................................................................................................ C-24
5.3 Multiple External Device Operation (PZ-60DR-E, PZ-41SLB-E, M-NET) ....................................................... C-24
5.4 Multiple Lossnay Units Interlocked with One Indoor Unit (M-NET only) ......................................................... C-25
5.5 Operation monitor output
................................................................................................................................ C-26
5.6 Malfunction monitor output ............................................................................................................................. C-26
5.7 By-pass operation monitor output ................................................................................................................... C-26
5.8 Connection Method ........................................................................................................................................ C-26
5.9 When switching High/Low/Extra-Low fan speed externally (when CO 2 sensor or other equipment is connected) ..... C-28
5.10 When switching By-pass externally ................................................................................................................ C-29
5.11 When using the remote/local switching and the ON/OFF input (level signal) ................................................. C-29
5.12 When connecting to the City Multi, Lossnay remote controller (PZ-52SF-E) or Mitsubishi Electric Air-Conditioner Network System (MELANS) .... C-30
6. Precautions When Designing M-NET Systems
6.1 M-NET Transmission Cable Power Supply ..................................................................................................... C-31
6.2 Restrictions When the Lossnay Units are Connected to the Central Controller M-NET Transmission Cable
.......... C-31
6.3 Wiring Example .............................................................................................................................................. C-32
6.4 Power Supply to the Indoor Unit Transmission Cable ..................................................................................... C-33
7. M-NET Cable Installation
7.1 Precautions When Installing Wiring ................................................................................................................ C-34
7.2 Electrical Wiring .............................................................................................................................................. C-35
7.3 Control Cable Length....................................................................................................................................... C-36
8. M-NET System Designs
8.1 Address Denitions ........................................................................................................................................ C-37
8.2 Precautions When Setting the Groups (when not interlocked with City Multi indoor units)............................. C-39
8.3 Precautions When Performing Interlock Settings (when interlocked with City Multi indoor units)................... C-39

iV
9. Automatic Ventilation Switching
9.1 Effect of Automatic Ventilation Mode .............................................................................................................. C-40
9.2 Ventilation mode control .................................................................................................................................. C-40
10. Troubleshooting
10.1 Service Flow ................................................................................................................................................... C-44
10.2 Checklist
......................................................................................................................................................... C-45
11. Installation method
11.1 Electrical installation ....................................................................................................................................... C-64
11.2 Connecting the power supply cable ................................................................................................................ C-66
11.3 System conguration ...................................................................................................................................... C-66
11.4 Function Setting .............................................................................................................................................. C-72
11.5 Trial operation ................................................................................................................................................. C-76
12. Lossnay Remote Controller (PZ-60DR-E)
12.1 Parts Names ................................................................................................................................................... C-78
12.2 Setting the Day of the Week and Time ........................................................................................................... C-79
12.3 Using the Remote Controller .......................................................................................................................... C-79
12.4 Care and Maintenance ................................................................................................................................... C-83
12.5 Servicing
........................................................................................................................................................ C-83
12.6 How to Install .................................................................................................................................................. C-84
12.7 Test Run ......................................................................................................................................................... C-85
12.8 Function Selection .......................................................................................................................................... C-86
13. Lossnay Remote Controller (PZ-41SLB-E).......................................................................................... C-91
14. Lossnay M-NET Remote Controller (PZ-52SF-E)............................................................................. C-92
15. Appendix
15.1 Centralized Controller (AG-150A) ................................................................................................................... C-93
15.2 Remote Controllers for M-Series or P-Series indoor units ............................................................................ C-100
15.3 ME Remote Controller (PAR-F27MEA) ........................................................................................................ C-103

Lossnay Unit

CHAPTER 1
Ventilation for Healthy Living

U-2
CHAPTER 1 •Ventilation for Healthy Living
Ventilation air must be introduced constantly at a set ratio in an air-conditioning system. The ventilation air introduced is to be
mixed with the return air to adjust the temperature and humidity, supply oxygen, reduce odors, remove tobacco smoke, and to
increase the air cleanliness.
The standard ventilation (outdoor air intake) volume is determined according to the type of application, estimated number of
occupants in the room, room area, and relevant regulations. Systems that accurately facilitate these requirements are required
in buildings.
1. Necessity of Ventilation
The purpose of ventilation is basically divided into “oxygen supply”, “air cleanliness”, “temperature control” and “humidity control”.
Air cleanliness includes eliminating “odors”, “gases”, “dust” and “bacteria”. Ventilation needs are divided into “personal comfort”,
“optimum environment for animals and plants”, and “optimum environment for machinery and constructed materials”.
Ventilation regulations are detailed in a variety of codes and standards applied to mechanical systems in buildings. Energy
efficiency codes also often apply to the design of ventilation systems.
1.1 Room Air Environment in Buildings
In Japan, the “Building Management Law”, a law concerning the sanitary environment in buildings, designates 11 applications
including offices, shops, and schools with a total floor area of 32,300ft2 (3,000m2) or more, as buildings. Law maintenance
and ventilation, water supply, discharge management according to the Environmental Sanitation Management Standards is
obligatory.
The following table gives a specific account of buildings in Tokyo.
(Tokyo Food and Environment Guidance Center Report)
Specic Account of Buildings in Tokyo (March, 2003)
Note: Excludes buildings with an expanded oor space of 32,300 to 58,820ft2 (3,000 to 5,000m2) in particular areas.
Results of the air quality measurement public
inspection and the standard values that were
not met (percentage of unsuitability) for the
approximately 500 buildings examined in 1980
are shown in the chart at the right.
There was a large decrease in high percentages
of floating particles, but there was almost no
change in temperature and carbon dioxide. The
highest percentage of unsuitability in 2006 is
relative humidity with 36%, followed by carbon
dioxide at 28%.
70
60
50
40
30
20
10
0
Percentage of unsuitable air quality (%)
Percentage of unsuitable air quality (%)
76 77 78 79 80 8171 72 73 74 75 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02
76 77 78 79 80 8171 73 75 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 9900 01 02 03 0405 06
(year)
(year)
relative humidity
carbon dioxide
temperature
carbon monoxide
ventilation
floating particles
(tobacco smoke)
0
10
20
30
40
50
60
relative humidity
carbon dioxide
temperature
carbon monoxide
ventilation
floating particles
(tobacco smoke)
Percentage Unsuitable Air Quality by Year
(From reference data in the 2006 edition of the “Water Supply
Division, Dept. of Localized Public Health, Tokyo Metropolitan
Government, Bureau of Public Health”)
Number of Buildings %
Offices 1,467 56.7
Shops 309 22.0
Department Stores 63 2.4
Schools 418 16.2
Inns 123 4.8
Theaters 86 3.3
Libraries 12 0.5
Museums 11 0.4
Assembly Halls 63 2.4
Art Museums 8 0.3
Amusement Centers 27 1. 0
Total 2,587 100.0

U-3
CHAPTER 1 •Ventilation for Healthy Living
Effect of Carbon Monoxide (CO) 10,000 ppm = 1%
In Japan, an Instruction Guideline based on these regulations has been issued, and unified guidance is followed. Part of the
Instruction Guideline regarding ventilation is shown below.
•The ventilation air intake must be 33ft (10m) or higher from ground level, and be located at an appropriate distance from the
exhaust air outlet. (Neighbouring buildings must also be considered.)
•The ventilation air intake volume must be 15 to 18 CFM·occupant. (25 to 30 m3/h·occupant.)
•An air volume measurement access hole must be installed at an appropriate position to measure the treated air volume of
the ventilating device.
•Select the position and shape of the supply diffuser and return grille to evenly distribute the ventilation air in the room.
1.2 Effect of Air Contamination
Effect of Oxygen (O2) Concentration
Concentration (%) Standards and Effect of Concentration Changes
Approx. 21 Standard atmosphere.
20.5 Ventilation air volume standard is a guideline where concentration does not decrease more than 0.5%
from normal value. (The Building Standard Law of Japan)
20 - 19 Oxygen deciency of this amount does not directly endanger life in a normal air pressure, but if there is a
combustion device in the area, the generation of CO will increase rapidly due to incomplete combustion.
18 Industrial Safety and Health Act. (Hypoxia prevention regulations.)
16 Normal concentration in exhaled air.
16 - 12 Increase in pulse and breathing; resulting in dizziness and headaches.
15 Flame in combustion devices will extinguish.
12 Short term threat to life.
7 Fatal
Concentration (ppm) Effect of Concentration Changes
0.01 - 0.2 Standard atmosphere.
5 Tolerable long-term value.
Approx. 5 ppm is
the annual
average value in
city
environments.
This value may
exceed 100 ppm
near roads, in
tunnels and
parking areas.
10 The Building Standard Law of Japan, Law for Maintenance of Sanitation in Buildings.
Environmental standard for a 24-hour average.
20 Considered to be the tolerable short-term value.
Environmental standard for an 8-hour average.
50 Tolerable concentration for working environment.
(Japan Industrial Sanitation Association)
100 No effect for 3 hours. Effect noticed after 6 hours.
Headache, illness after 9 hours; harmful for long-term but not fatal.
200 Light headache in the frontal lobe in 2 to 3 hours.
400 Headache in the temporal lobe, nausea in 1 to 2 hours; headache in the back of head in 2.5 to 3 hours.
800 Headache, dizziness, nausea, convulsions in 45 minutes. Comatose in 2 hours.
1,600 Headache, dizziness in 20 minutes. Death in 2 hours.
3,200 Headache, dizziness in 5 to 10 minutes. Death in 30 minutes.
6,400 Death in 10 to 15 minutes.
12,800 Death in 1 to 3 minutes.
Several 10,000 ppm
(Several %) Level may be found in automobile exhaust.

U-4
CHAPTER 1 •Ventilation for Healthy Living
Effect of Carbon Dioxide (CO2)
Note: According to Facility Check List published by Kagekuni-sha.
1.3 Effect of Air Contamination in Buildings
•Dirtiness of interior
New ceilings, walls and ornaments will turn yellow from dust in 1 to 2 years.
2. Ventilation Standards
The legal standards for ventilation differ according to each country. Please follow the standards set by your country. In the U.S.,
ASHRAE revised their standards in 1989 to become more strict.
Concentration (%) Effect of Concentration Changes
0.03 (0.04) Standard atmosphere.
0.04 - 0.06 City air.
0.07 Tolerable concentration when many occupants stay in the space for long time. There is no toxic level in
CO2alone.
However, these
tolerable concentrations
are a guideline of the
contamination estimated
when the physical and
chemical properties of
the air deteriorate in
proportion to the
increase of CO2.
0.10 General tolerable concentration.
The “Building Standard Law” of Japan, “Law for Maintenance of Sanitation in Buildings”.
0.15 Tolerable concentration used for ventilation calculations.
0.2 - 0.5 Relatively poor.
0.5 or more Very poor.
0.5 Long-term safety limits (U.S. Labor Sanitation) ACGIH, regulation of working offices.
2 Depth of breathing and inhalation volume increases 30%.
3 Work and physical functions deteriorate, increase breathing doubles.
4 Normal exhalation concentration.
4 - 5 The respiratory center is stimulated; depth and times of breathing increases. Dangerous if inhaled for a
long period. If an O2deciency also occurs, conditions will rapidly deteriorate and become dangerous.
8When inhaled for 10 minutes, breathing difficulties, redness in the face and headaches will occur.
Conditions will worsen when there is also an O2 deciency .
18 or more Fatal

U-5
CHAPTER 1 •Ventilation for Healthy Living
1) System operation with cassette-type indoor units of air conditioner
2) System operation with ceiling embedded-type indoor units of air conditioner
3) Independent operation with ceiling suspended-type indoor units of air conditioner
3. Ventilation Method
3.1 Comparing of Ventilation Methods
There are two main types of ventilation methods.
Centralized Ventilation Method
Mainly used in large buildings, with the ventilation air intake being installed in one machine room. For this method, primary
treatment of the ventilation air, such as energy recovery to the intake air and dust removal, is performed via distribution to the
building by ducts.
Independent Zoned Ventilation Method
Mainly used in small to medium sized buildings, with areas being ventilated using ventilation air intake via independent
ventilation devices. The use of this method has recently increased as independent control is becoming more feasible.
Centralized Ventilation Method Independent Zoned Ventilation Method
Air intake
(ventilation
air) Filters
Air exhaust
(stale air)
Cassette-type indoor units of
air conditioner or fan coil unit
Cassette-type or ceiling
suspended-type indoor units of
air conditioner or fan coil unit
Exhaust grill
Ceiling recessed-
type Lossnay
Exhaust air
Ventilation air
Finished ceiling
Exhaust air
Ventilation air
Finished ceiling
Lossnay
Supply fan
Exhaust
Each unit
Ceiling embedded-type indoor units
of air conditioner or fan coil unit
Ceiling recessed-
type Lossnay
Exhaust grill
Exhaust air
Ventilation air
Finished ceiling
Ceiling recessed-
type Lossnay
Exhaust grill
Supply grill

U-6
CHAPTER 1 •Ventilation for Healthy Living
Comparing Centralized Ventilation and Independent Zoned Ventilation Methods
Centralized Ventilation Method Independent Zoned Ventilation Method
System Flexibility
Fan Power The air transfer distance is long, thus requiring
much fan power.
As the air transfer distance is short, the fan power is
small.
Installation Area
• Independentequipmentroomisrequired.
• Ductspaceisrequired.
• Penetrationofoorswithverticalshaftisnot
recommended in terms of re prevention.
• Independentequipmentroomisnotrequired.
• Pipingspaceisrequiredonlyabovetheceiling.
Zoning Generalized per system. Can be used for any one area.
Design
• Designofouterwallisnotlost.
• Theindoorsupplyairdiffuserandreturngrillecan
be selected without restrictions for an appropriate
design.
• Thenumberofintakesandexhaustairoutletson
an outside wall will increase; design must be
considered.
• Thedesignwillbexedduetoinstallationttings,
so the design of the intakes and exhaust air
outlets must be considered.
Control
• Astheusagesettimeandventilationvolume
control, etc., are performed in a central monitoring
room, the user’s needs may not be met
appropriately.
• Alargeamountofventilationisrequiredevenfor
a few occupants.
• Theuserineachzonecanoperatetheventilator
without restrictions.
• Theventilatorcanbeoperatedevenduringoff-
peak hours.
Comfort
• Anidealsupplyairdiffuserandreturngrille
position can be selected as the supply air diffuser
and return grille can be positioned without
restrictions.
• The only noise in the room is the sound of air movement.
• Antivibrationmeasuresmustbetakenasthefanin
the equipment room is large.
• Considerationmustbemadebecauseofthe
noise from the main unit.
• Antivibrationmeasuresareoftennotrequiredas
the unit is compact and any generated vibration
can be dispersed.
System Management
Maintenance and
Management
• Centralizedmanagementiseasyasitcanbe
performed in the equipment room.
• Theequipmentcanbeinspectedatanytime.
• Workefficiencyispoorbecausetheequipmentis
not centrally located.
• Anindividualunitcanbeinspectedonlywhenthe
room it serves is vacant.
Trouble inuence
• Theentiresystemisaffected.
• Immediateinspectioncanbeperformedinthe
equipment room.
• Limitedasonlyindependentunitsareaffected.
• Consultationwiththetenantisrequiredpriorto
inspection of an individual unit.
Costs
Because there are many common-use areas, if the
building is a tenant building, an accurate
assessment of operating cost is difficult.
Invoicing for each zone separately is possible, even
in a tenant building.

U-7
CHAPTER 1 •Ventilation for Healthy Living
4. Ventilation Performance
The ventilation performance is largely affected by the installation conditions. Optimum performance may not be achieved
unless the model and usage methods are selected according to the conditions.
Generally, the ventilation performance is expressed by “air volume” and “wind pressure (static pressure)”.
4.1 Air Volume
Air volume equals the volume of air exhausted (or supplied) by the unit in a given period, and is expressed in CFM or m3/hr (hour).
4.2 Wind Pressure
When a piece of paper is placed in front of a fan then released, the piece of paper will be blown away. The force that blows the
paper away is called wind pressure and is normally expressed in inH2O. Wind pressure is divided into the following three types:
4.2.1 Static Pressure
The force that effects the surroundings when the air is contained such as in an automobile tyre or rubber balloon. For example,
in a water gun, the hydraulic pressure increases when pressed by a piston. If there is a small hole, the water is forced out of
that opening. The pressure of the water is equivalent to air static pressure. The higher the pressure, the farther the water (air)
can be forced out.
4.2.2 Dynamic Pressure
The speed at which air flows; for example, the force at which a hurricane presses against a building.
4.2.3 Total Pressure
The total force that wind has, and is the sum of the static pressure and dynamic pressure.

U-8
CHAPTER 1 •Ventilation for Healthy Living
4.3 Measuring the Air Volume and Static Pressure
Mitsubishi Electric measures the Lossnay’s air volume and static pressure with a device as shown below according to Japan
Industrial Standards (JIS B 8628).
Measuring Device Using Orice (JIS B 8628 Standards)
Static pressure (H)
Air volume (Q)
Measurement Method
The unit is operated with the throttle device fully closed. There is no air flow at this time, and the air volume is 0. The maximum
point of the static pressure (Point A, the static pressure at this point is called the totally closed pressure) can be obtained. Next,
the throttle device is gradually opened, the auxiliary fan is operated, and the median points (Points B, C and D) are obtained.
Finally, the throttle device is completely opened, and the auxiliary fan is operated until the static pressure in the chamber reaches 0.
The maximum point of the air volume (Point E, the air volume at this point is called the fully opened air volume) is obtained. The
points are connected as shown below, and are expressed as air volume, static pressure curves (Q-H curve).
Connection
Wind dispersing place
Connection
Smoothing
grid
Smoothing
grid
Supply
Air
(SA)
Chamber
Return
Air
(RA)
Smoothing
net
Smoothing
net
Wind gauge
duct path Orice
Wind gauge
duct path Orice
Damper
Blower
Blower
Test unit
Test unit
Static pressure in chamber
(Static pressure measurement)
Static pressure in chamber
(Static pressure measurement)
Pressure
difference before
and after orice
(Air volume
measurement)
A) When measuring the supply air volume (with the orice plate)
B) When measuring the return air volume (with the orice plate)

U-9
CHAPTER 1 •Ventilation for Healthy Living
5. Outdoor Air (ventilation) Load
5.1 How to Calculate Each Approximate Load
5.1 A (US unit)
The ventilation air load can be calculated with the following formula if the required ventilation intake volume “Q CFM” is known:
(Ventilation air load) = γ· QF· (iO- iR)
= γ [lb/ft3] × S[ft2] × k × n [occupant/ft2] × Vf [CFM / occupant] × (iO - iR): ∆i [Btu/lb]
γ: Specific air gravity - 0.0749 lb/ft3
S : Building’s airconditioned area
k : Thermal coefficient; generally 0.7 - 0.8.
n : The average population concentration is the inverse of the occupancy area per person. If the number of persons in the
room is unclear, refer to the Floor space per person table below.
Vf : Ventilation air intake volume per occupant
Refer to the Required ventilation air intake volume per occupant table below.
iO: Ventilation air enthalpy - Btu/lb
iR: Indoor enthalpy - Btu/lb
Floor Space per Occupant (ft2)
(According to the Japan Federation of Architects and Building Engineers Associations)
Required Ventilation Air Intake Volume Per Occupant (CFM per occupant)
Caution
The amount of smoking that could be present in each type of room must be carefully considered when obtaining the
required ventilation volume shown in the table above.
Office Building
Department Store, Shop Restaurant Theater or
Cinema Hall
Average Crowded Empty
General Design 43 - 75 5.4 - 21.5 5.4 - 21.5 54 - 86 10.8 - 21.5 4.3 - 6.5
Value 54 32.3 10.8 64.6 16.1 5.4
Amount of Cigarette Smoking
Application Example Required Ventilation Volume
Recommended Value Minimum Value
Extremely Heavy
Broker’s office
Newspaper editing room
Conference room
50 30
Quite Heavy Bar
Cabaret 30 25
Heavy Office
Restaurant 15 10 12
Light Shop
Department store 15 10
None Theater
Hospital room
15
20
10
15

U-10
CHAPTER 1 •Ventilation for Healthy Living
5.1 B (SI unit)
The ventilation air load can be calculated with the following formula if the required ventilation intake volume “Q m3/h” is known:
(Ventilation air load) = γ· QF· (iO- iR)
= γ [kg/m3] × S [m2] × k × n [occupant/m2] × Vf [m3/h·occupants] × (iO- iR): ∆i [kJ/kg]
γ: Specific air gravity - 1.2 kg/m3
S : Building’s air-conditioned area
k : Thermal coefficient; generally 0.7 - 0.8.
n : The average population concentration is the inverse of the occupancy area per occupant. If the number of occupants in the
room is unclear, refer to the Floor space per occupant table below.
Vf : Ventilation air intake volume per occupant
Refer to the Required ventilation air intake volume per occupant table below.
iO: Ventilation air enthalpy - kJ/kg
iR: Indoor enthalpy - kJ/kg
Floor Space per Occupant (m2)
(According to the Japan Federation of Architects and Building Engineers Associations)
Required Ventilation Air Intake Volume Per Occupant (m3/h·occupant)
Caution
The amount of smoking that could be present in each type of room must be carefully considered when obtaining the
required ventilation volume shown in the table above.
Office Building
Department Store, Shop Restaurant Theater or
Cinema Hall
Average Crowded Empty
General Design 4 - 7 0.5 - 2 0.5 - 2 5 - 8 1 - 2 0.4 - 0.6
Value 5 3.0 1. 0 6.0 1. 5 0.5
Amount of Cigarette Smoking
Application Example Required Ventilation Volume
Recommended Value Minimum Value
Extremely Heavy
Broker’s office
Newspaper editing room
Conference room
85 51
Quite Heavy Bar
Cabaret 51 42.5
Heavy Office
Restaurant 25.5 17 20
Light Shop
Department store 25.5 17
None Theater
Hospital room
25.5
34
17
25.5

U-11
CHAPTER 1 •Ventilation for Healthy Living
Cooling Load Per Unit Area
When the volume of ventilation air per occupants is 15 CFM (25 m3/h), and the number of occupants per 1 ft2is 0.0186 (1 m2is
0.2), the cooling load will be approximately 14.6 W/ft2(157.0 W/m2).
•Ventilation Load
Standard design air conditions in Tokyo
See below for Calculation examples of determining ventilation load during both cooling and heating.
5.2 Ventilation Load During Cooling (In an Office Building)
•Cooling Load Classications
(a) Is the heat penetrating the room, and often is 30 to 40% of the entire cooling load?
(b) Is the heat generated in the room?
(c) Is applies only when reheating is necessary?
(d) Is the heat generated when ventilation air is mixed into part of the supply air diffuser volume and introduced into the room?
The ventilation air is introduced to provide ventilation for the room occupants, and is referred to as the ventilating load.
Typical Load Values During Cooling
Conditions: Middle south-facing oor of a typical office building.
<US unit>
When the load per floor area of 1 ft2with a ventilation volume of 15 CFM·occupant is calculated with the air conditions detailed
above, the following is obtained:
Ventilation air load = 0.0749 Ib/ft3(Specific gravity of air) × 0.0186 occupant/ft2(number of occupants per 1 ft2)
× 15 CFM·occupants (ventilation air volume) × 13.7 Btu/Ib (air enthalpy difference indoor/outdoor) = 0.286 Btu/min·ft2(4.9 W/ft2)
<SI unit>
When the load per floor area of 1 m2with a ventilation volume of 25 m3/h·occupant is calculated with the air conditions detailed
above, the following is obtained:
Ventilation air load = 1.2 kg/m3(Specific gravity of air) × 0.2 occupant/m2(number of occupants per 1 m2)
× 25 m3/h·occupants (ventilation air volume) × 31.8 kJ/kg (air enthalpy difference indoor/outdoor) = 190.8 kJ/h·m2(53.0 W/m2)
The Lossnay recuperates approximately 70% of the exhaust air load and saves on approximately 20% of the total load.
Ventilation air
load 33.8%
4.9 W/ft2
(53.0 W/m2)
Indoor
penetration
heat 30.3%
4.4 W/ft2
(47.6 W/m2)
Indoor
generated heat
(occupants, lighting
equipment) 35.9%
5.2 W/ft2(56.4 W/m2)
14.6 W/ft2
(157.0 W/m2)
Office Building Department Store, Shop
(a) Indoor penetration heat
Heat generated from walls (qWS)
Heat generated from glass
from direct sunlight (qGS)
from conduction and convection (qGS)
Accumulated heat load in walls (qSS)
(b) Indoor generated heat
Generated heat from occupants
Sensible heat (qHS)
Latent heat (qHL)
Generated heat from electrical equipment Sensible heat (qES)
Latent heat (qEL)
(c) Reheating load (qRL)
(d) Outdoor air load Sensible heat (qFS)
Latent heat (qFL)
Load Type Load
Ventilation Air Load 4.9 W/ft2(53.0 W/m2)
Indoor
Generated Heat
Occupants 2.5 W/ft2(26.4 W/m2)
Lighting Equipment 2.8 W/ft2(30.0 W/m2)
Indoor Penetration Heat 4.4 W/ft2(47.6 W/m2)
Total 14.6 W/ft2(157.0 W/m2)
Dry Bulb Temp. Relative Humidity Wet Bulb Temp. Enthalpy Enthalpy Difference
Cooling Outdoor Air 91.4°F (33 °C) 63% 80.6°F (27 °C) 36.5 Btu/Ib (85 kJ/kg) 13.6 Btu/Ib (31.8 kJ/kg)
Indoor Air 78.8°F (26 °C) 50% 65.7°F (18.7 °C) 22.9 Btu/Ib (53.2 kJ/kg)