Ventive Windhive User manual

Installation Manual
Ventive Windhive

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Contents
1. Company Details ........................................................................................................................................................3
2. Health and Safety Information ............................................................................................................................... 4
2.1 Personal Protective Clothing........................................................................................................................... 4
2.2 Consideration of Technical Risk...................................................................................................................... 4
3. Design...........................................................................................................................................................................5
3.1 General Considerations.....................................................................................................................................5
3.2 Optimum heat recovery performance............................................................................................................5
4. Product Description .................................................................................................................................................. 6
5. How to use this manual ........................................................................................................................................... 6
6. System Components ................................................................................................................................................. 9
7. System Component Orientation ...........................................................................................................................10
8. Parts List....................................................................................................................................................................11
9. Flat Roof Applications.............................................................................................................................................14
9.1 Prepare Roof Opening .....................................................................................................................................14
9.2 Prepare Upstand...............................................................................................................................................15
9.3 Drain gutter clearance cut-out ......................................................................................................................16
9.4 Installing the Heat Exchanger .......................................................................................................................17
9.5 Fitting the Cowl .................................................................................................................................................19
10. Flat Roof - Extended Height Applications..........................................................................................................21
10.1 Prepare Roof Opening ...................................................................................................................................21
10.2 Prepare Upstand.............................................................................................................................................22
10.3 Drain gutter clearance cut-out....................................................................................................................23
10.4 Installation of Skirt Extension.....................................................................................................................24
10.5 Installing the Heat Exchanger.....................................................................................................................25
10.6 Fitting the Cowl...............................................................................................................................................27
11. Pitched Roof Applications......................................................................................................................................29
11.1 Prepare Roof Opening ...................................................................................................................................29
11.2 Prepare Upstand.............................................................................................................................................30
11.3 Drain gutter clearance cut-out....................................................................................................................31
11.4 Installation of Skirt Extension.....................................................................................................................32
11.5 Extensions Pieces...........................................................................................................................................33
11.6 Installing the heat exchanger......................................................................................................................34
11.7 Fitting the Cowl...............................................................................................................................................36

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12. Installing the Internal Diffuser.............................................................................................................................38
12.1 Internal Diffuser Installation .......................................................................................................................38
12.2 Installing Absorption Bag.............................................................................................................................41
13. Installing Ceiling Mounted Diffuser Box ............................................................................................................42
13.1 External Diffuser Box.....................................................................................................................................42
13.2 Fitting the External Diffuser Box ................................................................................................................42
13.3 Fully Assembled External Diffuser ............................................................................................................44
14. Supply Duct for Ducted System ...........................................................................................................................45
14.1 Suppy Duct .......................................................................................................................................................45
15. Ducting Details .........................................................................................................................................................46
15.1 Ducting Installation........................................................................................................................................46
15.2 Duct Variants ...................................................................................................................................................47
16. Ventive Hub Controls..............................................................................................................................................48
16.1 CO2 Sensor.......................................................................................................................................................49
16.2 External Temperture Sensor .......................................................................................................................51
16.3 Wiring Detail ....................................................................................................................................................52
17. Post - installation Checklist of Ventive Windhive............................................................................................53
17.1 Above Roof........................................................................................................................................................53
17.2 Below Roof........................................................................................................................................................53
17.3 Ducted – Within Building Envelope............................................................................................................53
18. Commissioning.........................................................................................................................................................54
19. Installer Details........................................................................................................................................................54
1. Company Details
Ventive Ltd
Thames House
Swan Street
Isleworth
TW7 6RS
Contact:
Tel: [phone]
Email: [e-mail]
Website: www.ventive.co.uk

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2. Health and Safety Information
Before installation of the Ventive Windhive units can commence, it is essential that all installers
have valid CSCS cards and all other relevant qualifications.
2.1 Personal Protective Clothing
PPE must be worn at all times while on site which include:
-Hard Hats
-Gloves
-Eye Protection
-Steel Toe Cap Boots
-High Visability Jackets
-*Lifting harness may be required dependent on-site rules
Installation of Ventive Windhive involves working at height and installers must comply with the
Work at Height Regulations, 2005 . As part of the Regulations it must be ensured that:
-All work at height is properly planned and organised;
-Those involved in work at height are competent and authorised;
-The risks from work at height are assessed and correct work equipment is selected and used;
-The risks from fragile surfaces are properly controlled; and
-Equipment for work at height is properly inspected and maintained.
For detailed guidance please refer to “Health and safety in roof work”, 2012, HSE.
Ventive Ltd accepts no liability resulting from injury, loss or damage caused by inappropriate
workmanship on site.
2.2 Consideration of Technical Risk
Installation of Ventive Windhive should be completed in accordance with this manual. Any changes
to the installation process should be approved by Ventive Technical Support - see contact details
on the last page.
Installation works are to be conducted by competent individuals with roofing experience and
preferably trained by Ventive and only with originally supplied parts, or products recommended by
Ventive Technical Support. Installation should not interfere with other construction elements or
services within the building.
Non-compliant installation voids the warranty and Ventive Ltd takes no responsibility for any loss
or damage caused by incorrect installation and use of the system.

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3. Design
3.1 General Considerations
1. Duct sizes and types should be in accordance to this manual or following advice from
Ventive Technical Support.
2. Use of horizontal duct runs is not recommended apart from the final leg of either supply or
extract directly connecting to the room inlet/outlet. In such a scenario the maximum length
should be less than 300mm for the extract and the supply.
3. It is recommended that all ducts are installed within heated or insulated spaces. When in
unheated or exposed areas the ducts should be separately insulated.
4. The supply duct is to be terminated at low level - 400mm maximum recommended distance
above the floor.
5. The Windhive unit incorporates a water run off drain which exits the unit at roof level.
3.2 Optimum heat recovery performance
To maximise the benefits of heat recovery, Ventive Windhive should be used in buildings with air
permeability of 5m3/h.m2 @ 50Pa or better; If this is not achieved an increased proportion of
make-up air will be provided by infiltration, reducing the overall energy saving. Please seek further
advice from our Technical Support when designing ventilation for buildings with airtightness better
than 1 m3/ h.m2 @ 50Pa.
The use of trickle vents is not recommended when installing Ventive as all incoming air should be
handled by the system. Unless our purge ventilation option is chosen in which case an actuated
louvre will be provided.

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4. Product Description
Ventive Windhive is a Natural Ventilation System with Heat Recovery. It is designed to provide
continuous ventilation for schools and commercial buildings during occupied hours, without the
use of electricity, while recovering heat from the outgoing stale air.
Ventive utilises a combination of air buoyancy and wind to provide ventilation, maintaining good
indoor air quality at all times. When installed correctly, Ventive Windhive can recover up to 75% of
heat from the outgoing air, improving occupant comfort and reduces heating costs.
Ventive Windhive is designed to fit through the roof. As a modular solution it offers a level of
flexibility, with the number of systems tailored to the building size and type.
The system has three external variants available depending on the roof type which are for flat roof
application, flat roof application with extended height or pitched roof application.
Internally the system has three variants depending on the design of the building. The Windhive can
either be ducted down to multiple floors, ducted to a suspended ceiling or have an in-room diffuser.
5. How to use this manual
This manual has been designed to assist with installation of the Ventive Windhive. It contains
detailed drawings and instructions. There are three different variations depending on roof type and
roof height.
Please follow the below options depending on the configuration you require.
Option 1: Flat Roof Application
Sections required for installation:
6. System Components
7. System Component Orientation
8. Parts List
9. Flat Roof Applications
12. Installing the Internal Diffuser
Please see page 7 for Ducted system or Ceiling Mounted system options.
Figure 1 – Flat roof option.

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Option 2: Flat Roof Application with Extended Height
Sections required for installation:
6. System Components
7. System Component Orientation
8. Parts List
10. Flat Roof – extended height required application
12. Installing the Internal Diffuser
Please see page 7 for Ducted system or Ceiling Mounted system options.
Figure 2 – Flat Roof Application
with extended height
Option 3 : Pitched Roof Application
Sections required for installation:
6. System Components
7. System Component Orientation
8. Parts List
11. Pitched Roof Applications
12. Installing the Internal Diffuser
Please see page 7 for Ducted system or Ceiling Mounted system options.
Figure 3 – Pitched Roof Option.
Note: The following extension pieces will be preassembled to the bottom of the heat exchanger
housing based on the roof pitch below.
PITCHES OF 9°- 20° = SINGLE 250MM EXTENSION DUCT
PITCHES OF 21°- 30° = SINGLE 500MM EXTENSION DUCT
PITCHES OF 31- 40° = 250MM & 500MM EXTENSION DUCT
PITCHES OVER 40° WILL A REQUIRE BESPOKE SKIRT. PLEASE CONTACT VENTIVE FOR
INFORMATION.

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In Room Ceiling Mounted Option:
If you are installing a ducted system, please go to
sections below once you have completed the
installation of the internal diffuser.
Sections required for installation:
13. Installing Ceiling Mounted Diffuser Box
Figure 4 – Ceiling mounted option.
Ducted System Option:
If you are installing a ducted system, please go to
sections below once you have completed the
installation of the internal diffuser.
Sections required for installation:
14. Supply Duct for Ducted System
15. Ducting Details
Figure 5 –Ducted installation option.

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Cowl
Heat
exchanger
Heat exchanger
with extension
duct
pitched roof or
extended height
required
Cowl
skirt
flat roof
Upstand
box
flat roof
Upstand box
pitched roof
Cowl skirt
extension
pitched roof
Diffuser
assembly
Supply duct
adaptor
Ducted system
Ceiling
Mounted
External
Diffuser
6. System Components
In the image below you can see an exploded assembly of the Ventive windhive. It shows all of the
system components of the windhive system.
Figure 6 – System component breakdown.

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7. System Component Orientation
Ensure that all of the arrow labels on each assembly are aligned within the same plane during
installation. The unit can only be aligned in one orientation.
Note: Arrow labels to be removed after installation.
Figure 7 – Showing alignment of Windhive unit.
or

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8. Parts List
Listed from top to bottom as installed:
Item
No:
Item
Description
QTY
Weight
Kg
1
Ventive Cowl
1
43.4 kg
2
Heat Exchanger
Standard or Extended
Extended will come with
250mm or 500mm extension
1
Standard:
26.5 kg
Extended:
39.5 kg
3
Cowl Skirt
Upper or Upper & Lower
1
Upper
Skirt:
9.5 kg
Lower
Skirt:
6.3 kg

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4
Upstand
Standard or Extended
Supplied & fitted by others.
Height will be specified by
Ventive
1
Depending
on others
5
Internal Diffuser assembly
1
16.6 kg
6
Supply duct adaptor
Pre fitted to internal diffuser
for ducted system
Different spigot variations:
400mm/300mm/250mm
1
200 g
7
External diffuser housing
for ceiling mounted system
1
5 kg

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8
Absorption Bag
1 large & 1 small
1 set
3.5 kg
Note: If you are installing a ducted system we will send you a ducting schedule to advise you
on the items Ventive will supply.

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9. Flat Roof Applications
9.1 Prepare Roof Opening
1. Create roof opening of minimum 828mm x 828mm on the horizontal - see figure 8.
2. When working with a timber roof construction ensure you use structural opening details or
engineer’s drawings joints and trimmers details for clarity.
Figure 8 – Dimensions of roof opening.

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9.2 Prepare Upstand
1. 18mm Marine plywood upstand to be constructed and fixed by others around the perimeter,
with a minimum height of 160mm from the top of the upstand to the roof. This will create an
internal opening dimension of 792mm x 792mm – see figure 9.
2. The maximum external dimension of the upstand including flashing should be 838mm x
838mm.
3. Maximum overall height of upstand box to be 600mm.
4. Access clearance below upstand for system components to be a minimum of 908mm x
908mm.
5. Ensure upstand has been fully weatherproofed before installation of the heat exchanger.
6. Fix roof overlay ensuring it is secured.
7. Ensure the upstand is plumb and level.
Figure 9 – Upstand dimension details.

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9.3 Drain gutter clearance cut-out
1. Mark out shape as per diagram – see figure 10.
2. Drill 2 No. 10mm holes as indicated, jigsaw out remainder of shape leaving radiused corners
at bottom. Chamfer top corners as shown to aid installation – see figure 11.
3. For ducted installations this cut out may need to be in a specific face to enable optimum duct
routing, contact Ventive for advice on positioning.
Figure 10 – Upstand cut-out section. Figure 11 – Upstand drill section.
4. Drain feature in exchanger housing assembly locates into cut out made – see figure 12.
Figure 12 – Exchanger housing drain location assembly.

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9.4 Installing the Heat Exchanger
1. Insert the heat exchanger in to the timber aperture – see figure 13.
2. Ensure upper perimeter of the heat exchanger sits evenly on the plywood upstand - see
figure 14.
3. Align screws with the holes in the heat exchanger and fix the heat exchanger frame to the
timber upstand. Using the 16 number ST4.2 stainless screws supplied 4 per side in
locations as shown in figure 15.
Figure 13 – Heat exchanger position.Figure 14 – Heat exchanger final position.

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Figure 15 – Screw fixing location for the heat exchanger.
Secure exchanger assembly with 16
off screws supplied: ST4.2 x 19
stainless steel.

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9.5 Fitting the Cowl
1. Ensure the arrows located on the Windhive align with the arrows located on the heat
exchanger.
2. Lower the cowl terminal in to place – see figure 16.
3. Ensure it sits level on the heat exchanger – see figure 17.
4. Secure the casing to the heat exchanger using the 16 number ST4.2 screw supplied fixings in
location 4 per side in locations as shown below – see figure 18.
Figure 16 – Cowl position. Figure 17 – Final cowl position.

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Figure 18 - Screw fixing locations for the cowl.
Note: to continue installation for a pitched roof please go to section 12 Installing the diffuser
internals – All Roof Type page 38.
Secure Cowl with 16 off screws
supplied: ST4.2 x 19 stainless
steel & stainless/rubber
bonded washers.