BPC MVHR Series User manual

MVHR & Quiet-Vent Radial
Ductwork Installation Manual
The Home of Fresh Air

Contents
1.1 - Installation of MVHR unit (Refer to MVHR owners manual)
1.2 - Installation of MVHR controls (Refer to MVHR owners manual)
1.3 - Installation of Condensation drain (Refer to owners manual)
1.4 - Installation of Distribution boxes (Refer to plan)
1.5 - Installation of PVC Rigid ductwork to MVHR unit
1.6 - Installation of External Vents to MVHR unit
1.7 - Installation of Radial pipe into Distribution Box
1.8 - Installation of Radial pipe
1.9 - Installation of Radial pipe to Plenums
1.10 - Installation of Plenums to ceiling or wall
1.11 - Installation of Air Valves
1.12 - Optional Heaters and coolers
1.13 - Optional Fire control
1.14 - Commissioning
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Notes on this guide
This guide features the use of our premier kit with exible pipe connectors,additional silencer and pro
air valves
Not all radial pipe is the same and Various specication and colours are available, the illustrated
Quiet-Vent red pipe is widly regarded as the best available with excellent strength, ease of use and
with an antistatic, antibacterial lining

BPC Ventilation will Provide the Following:
Technical Support
You will nd most common issues on our website under technical guides or please email
our technical team on [email protected]
you can alternatively telephone our technical team on 028 2827 5150 (UK)
or [phone] (ROI). Available 10am-3pm Monday to Friday.
Installation Manual
Specic manufacturers installation manuals are supplied with the Heat Recovery unit that
you have purchased. These are also available in the knowledge centre of our website.
Air Flow Rates *On bespoke systems
For all the air valves to help commission the system.
Calculated Ducting Amount
The amount of ducting provided is calculated from the received plans, if more ducting is
required this would be at an additional cost.
Installing your Heat Recovery System
Safety
• Always wear appropriate personal protective equipment.
• Always wear a protective face mask when using duct insulation.
• It is recommended to use walking boards when working in a loft void.
• If the loft is fully insulated when work is being carried out, it is recommended to provide
adequate air throughout the installation process.
• Electrical connections should be made by a qualied electrician.
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Detailed Floor Plan *On bespoke systems
Includes approximate locations and dimensions of pipe.
You may have to alter the design to suit specic requirements
of the building that are not noted on the submitted plans.
List of all Supplied Ducting
Please ensure to check each delivery before you sign the
docket for damage or for missing items.
If there is any issue we will resove as soon as possible but
please note we can not be liable if you do not report any issue
within 3 days of delivery.

Professional Kit Contents
Our Professional Kits contain everything you should need to install a highly e󰀩cient MVHR system.
Please check with your material list as items may vary due to project design etc.
This guide features the use of our premier kit with exible pipe connectors,additional silencer and pro
air valves
MVHR Unit
Boost Switch
Semi Rigid Radial
ductwork
Sealing Rings
Distribution Box
Plenum
Fl exi b le p ip e
connectors
Semi Flex silencers
Detailed plans
(if provided)
Silver foil tape
Solid rigid PVC
pipe
90 degree bends
for PVC pipe
Connector for PVC
pipe
Silver foil faced
insulation
Duct Sealant
Air Supply valve
Air Extract valve
S/Steel external
cowl
Fixing Strap
150 to 125 reducer
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1.1
Installation of MVHR unit (Refer to MVHR owners manual)
Securely fasten and level the
xing bracket (allow for drain
area below the unit).
Position unit onto bracket. Ensure unit has small fall to
drain.
Install a condensation drain to
the unit with a waterless trap.
It is recommended that this is
connected to a 32mm waste
pipe (within 1m of the unit)
going into an internal drain.
If an internal drain is not
possible insure pipe has
su󰀩cient fall and is protected
from freezing.
The waterless trap and
condensation drain is
available as an additional
accessory to our kits
We recommend you install
boost switches outside the
bathrooms, 2 gang switches
are also available that
incorporate the light switch.
1.2
Installation of MVHR controls (Refer to MVHR owners manual)
1.3
Installation of Condensation drain (Refer to owners manual)
If available, we recommend
the installation of the MVHR
controller be positioned in the
kitchen/utility room or plant
room.
Some units require additional
room sensors to detect
moisture or Co2.
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1.4
Installation of Distribution boxes (Refer to plan)
There are various sizes and shapes
of distribution boxes available
for installation on walls, oors
and ceilings but all have similar
installation.
Install box by fastening with screws
via provided brackets connected to
boxes.
(Bracket may need turned around
on box).
Refer to your plan or material list to
conrm type.
6 point top entry box for oor
or ceiling installation, 150mm
spigot can be reduced to
125mm with provided reducer.
10 point top entry box for oor
or ceiling installation, 150mm
spigot can be reduced to
125mm with provided reducer,
also available with 180mm
spigot on request.
8 point rear entry box for oor or
wall installation, 150mm spigot
can be reduced to 125mm with
provided reducer.
15 point rear entry box for oor
or wall installation, 150mm
spigot.
Insulated 10 or 15 point rear
entry box for oor or wall
installation, 150/180mm spigot
can be reduced with provided
reducer.
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PVC ducting is normally supplied due
to ease of use and strength but an
alternitive solution would be to install
thermal EPP (foam)
spiral metal ducting is required on
pipework above 150mm diamater
PVC and thermal pipe is easy to cut
with a ne-toothed handsaw.
Connect exible pipe connectors to
the spigots of the unit and secure with
provided jubilee clips or cable ties.
Ensure that the exible connectors
are not crushed or heavily deformed.
Alternatively, a small length of exible
ducting could also be used.
Dry t the pipework so lengths can be
cut to size.
1.5
Installation of Rigid ductwork to MVHR unit
Install glue to male tting with
duct sealant or PVC glue.
Tape with silver foil tape
(do not use duct tape).
Insulate external pipes and
pipes above insulation in cold
areas with foil faced insulation.
Install semi exible silencers
between the unit and
distribution boxes, these can
be also be used to align the
pipework but ensure that
they are safe from possible
damage.
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1.6
Installation of External Vents to MVHR unit
• We provide MVHR roof vents suitable for slate and tiled roofs.
• It is important that the airow is not restricted.
• MVHR units using ductwork up to 150mm diameter require a roof vent with
an airow of 20,000mm2and have a rain cowl to prevent water or snow being
brought in. (Standard vents are designed for normal extraction only, not air
input to an MVHR).
• Do not use ush mounted roof vents without a cowl as unit warranty will be
void.
• We recommend the installation of an in-line drain with waterless trap be tted
to the air extract roof vent to prevent water damage to the unit
• In addition, roof vents must be installed at a higher level than the MVHR unit
or condensation will form in the pipework .
Wall Vents
• There should be a small fall to the external wall vents,
the vents are required to be installed at a minimum of 1.5
meters apart to prevent air contamination.
• All external pipework to the MVHR unit should be insulated
and nal connections by a exible pipe connector.
• Ductwork from the unit should be kept to a minimum and
preferably not exceed 5 meters
The most popular provided Stainless Steel cowls come with a mesh. Please
carefully remove the mesh if the cowls do not have easy access for cleaning.
Optional PVC louvred vents can be used on walls or so󰀩ts but are more
susceptible for rain or wind noise to enter the system.
Roof Vents
Flat roof vents are widely
available but due care has to
be taken to ensure the airow
capacity is not restricted and
are suitable for air supply.
On larger units requiring
over 20,000m2you can
use a commercial stack or
alternatively double up and
install two roof vents per pipe.
A short section of Insulated
exible ducting will be required
to install roof vents and ensure
that it is pulled tight and is not
crushed. This also should be
supported to prevent deformation
over time.
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Please note that the Stainless Steel cowls are not suitable for areas of sea salt
and PVC louvred vents should be tted.

1.7
Installation of Radial pipe into Distribution Box
Remove pipe retaining clip
from Distribution Box (if tted).
Insert sealing ring on second
grove on Radial pipe.
Insert pipe fully into distribution
box and ret retaining clip
ensuring the clip is between
groove of pipe.
Any unused ports on the
distribution box need sealed
by rst removing the pipe
retaining clip.
Insert the blue sealing
caps as far as possible into
distribution box. Unit and distribution boxes completed.
The Radial pipe is easy to cut with either a ne toothed-handsaw or Stanley knife, we can also supply
a professional radial pipe cutter if preferred.
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1.8
Installation of Radial pipe
Radial duct installed through
metal web joists.
Radial pipe going through timber
stud wall (recommended to use
a minimum of 100mm wide
timber).
Radial pipe on concrete ceiling,
Allow for a 100mm crevice void.
Optional Radial pipe clip to
connect pipe to ceiling.
Radial pipe connector for
joining 2 x radial pipe.
Radial tight 90-degree bends.
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The radial pipe is supplied in coils of 50m long lengths. (75/90mm
sizes).
The pipe is crushproof and can be buried in concrete or walked
over without damage.
All joins and connections require sealing with sealing rings.
We recommend that you support radial pipe with pipe clips or
xing band every 1 meter.
The pipe can be joined if required with available connectors.
The pipe can be bent two to four times its radius and tight
90-degree bends are available if required.
It is recommended that if there is any radial pipe installed in a cold
area it is insulated over with loft insulated or foil faced insulation.
The air capacity is maximum 36m3h/r per pipe, and it is quite
normal to have two or more pipes going to some rooms.
All connecting plenums have two or three outlets for radial pipe
(unused outlets are to be sealed closed).
It is recommended to keep lengths of radial to below 15m long, if
longer distance is required our technical team can help.
Note: Not all radial pipe is the same and Various specication
and colours are available, the illustrated Quiet-Vent red pipe is
regarded as the best available with excellent strength, ease of
use and antistatic, antibacterial lining
Quiet-Vent Red Radial ducting

1.9
Installation of Radial pipe to Plenums
90-degree plenum that can
be installed to walls and
ceilings.
Floor plenum that can be
tted to oors and used
with a oor grille.
Straight plenum that can
be used for wall grilles or
converting 125 pipe to 2 x
75mm pipes.
Pro Plenum Kit. Insert sealing ring in second
grove on radial pipe.
Insert one or two pipes into
plenum and t the retaining
clips.
If only inserting one pipe,
please seal plenum with
provided blanking cap.
Insert sealing ring onto cap.
Push cap into plenum and
secure with retaining clips.
During installation, the radial
system needs to be kept airtight
to prevent condensation and
dirt entering the system.
Install end caps or tape both
the plenums and external
vents (distribution boxes if not
connected).
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1.10
Installation of Plenums to ceiling or wall
When installing on top of
wooden joists you should
install a baton on top of the
joists and x plenum with
screws.
When installing between
joists, place bridging above
plenum below the oor and
x plenum with screws.
When installing on concrete
ceiling x plenum with
screws onto concrete.
We recommend that during
construction you do not
cut plenums to length. Fit a
sealing cap or seal opening
with tape.
It is important that the system
is kept air tight until ready for
operation or condensation
and dirt will accumulate
inside the ductwork. After plasterboard and plastering has been completed, trim the
plenum down ush with the nished ceiling.
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1.11
Installation of Air Valves
How to install Air valves
There are various types of air valves and the most popular are
the Pro model that simply push into the plenum.
The air supply valves that are angled internally for air supply.
The air extract valves have a variable bevel for extracting air.
The airow is adjusted by screwing the air valve in or
out to reach the desired airow rate. (See balancing and
commissioning).
After the airow is set, tighten the attached nut with a 10mm
spanner to secure setting.
Metal Air Valves
Optional Metal Air valves normally have a frame that you install into
the plenum or pipe rst, then fasten the air valve to the frame with a
half turn clockwise.
The valve is adjusted by screwing the valve in or out and then
locking with provided nuts.
Designer Air Valves
Optional designer air valves can be used for both air supply and
extract and can be installed ush to the wall or ceiling.
To install the designer valve, you will require a mounting frame and
a airow regulator installed in the pipe or plenum. (Available through
BPC).
Foam ow control dampers
Optional foam dampers can be used either with or without an air
valve to provide improved attenuation and air control.
Insert the foam damper inside the pipe or plenum before the air
valve or designer valve and remove the inserts until the desired
airow is achieved.
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1.13
Optional Fire control
On some builds you may require or personally prefer to have a re strategy and you can install the
following solutions.
1.12
Optional Heaters and coolers
Fire rated Air Valves
Fire rated air valves are the most popular
method to contain re on MVHR systems
and works with an integral intumescent
material that rapidly expands to seal o󰀨 the
air valve and reinstate the re resistance
rating of the ceiling.
Fire collars are suitable for
PVC pipe going through
concrete walls.
Fire sleeves are suitable
for PVC pipe going through
concrete and timber partitions.
Fire Dampers are suitable for
PVC and Metal pipe going
through concrete walls and
oors.
There are a number of solutions that can provide additional heat or cooling to further improve the
e󰀩ciency and personal comfort of your ventilation system.
Electric duct heaters can be
installed as pre-heaters for
frost control or post heaters to
supply warm air to rooms.
Water batteries are used to
either heat or cool the air by
using water supplied from
your heating or A/C system.
A MVHR geothermal system is
a pipe installed below ground
and connected to your MVHR
that will supply free heating or
cooling of approx. 10 degree
all year.
Cool-Vent
The Cool-Vent comfort cooler unit will lower the air temperature of the air
supply during very warm days to a comfortable temperature.
The unit can also be retrotted to any type of MVHR system with the use
of a cooler water battery
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1.14
Commissioning
Balancing and Commissioning
Before commissioning a system it is important that there is a su󰀩cient gap below all doors to
allow for air circulation and we recommend a gap of between 8mm to 10mm
To obtain a quiet and e󰀩cient MVHR system the system must be balanced to achieve the
recommend air change rates in each room.
On all bespoke in-house designed systems, we will supply you the required air ow rates on
the nal design as part of our installation pack.
To commission a ventilation system an airow meter (Anemometer) is required to allow you
to measure the air velocity in metres per hour (M3h/r) or Litres per second (L/s) at each inlet
or extract point as required for Building Regulations Part F.
We can help by supplying you details of a local technician to commission the system or
provide details of a company that hires the air meters.
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To commission system:
1. Adjust all air-valves by closing them then opening them by 2 full turns and set unit speed.
2. Start at the furthest extract valve and check the air ow volumes at all of the outlets and
note the air volume to each room, whilst doing this make sure that the direction of ow is
correct.
3. If the measured air ow is above or below the requirement set out on the provided ow
rates adjust each air valve by rotating the central cone on its screw thread to increase or
decrease the size of the air opening.
4. Replace the cover and re-measure the air volume. Repeat this process until the correct
ow rate is achieved.
5. Once all the extract rates are achieved, repeat the process for the supply valves.
6. When all inlets and outlets are measured it may be found that the total for extract or supply
maybe greater or lesser than required in which case the speed of the fans must be adjusted
at the air handling unit. (See MVHR manual on how to adjust).
Note: As any adjustments of individual air valves will a󰀨ect the ow rates of all other valves
on the duct system it will usually be necessary to re-balance the system three or more times
before the correct readings are achieved in every room.

UK O󰀩ce
T: 028 2827 5150
E: [e-mail]
www.bpcventilation.com
Dublin O󰀩ce
T: [phone]
E: [e-mail]
www.bpcventilation.ie
If you have an issue installing the
MVHR system, please contact
our technical team by email or
telephone that can help you.
Most Information can also be found
on our website.
We are Here To Help!
Don’t worry if you need some extra
items to complete your install.
We have thousands of ventilation
parts in our distribution centre that
are available for express delivery.
If you do require the MVHR system
installed or commissioned, we have
a large network of fully trained
installers throughout the UK and
Ireland that can help.