Heat Recovery Ventilation System
The Problem
Modern well insulated homes with central heating suffer air pollution up to 10 times worse than outside, according to a 'Which' report.
Surveys by the (Department of Environment Transport Region) DETR and the Building Research Establishment (BRE) have Carbon Dioxide levels
in one in ten British homes above World Health Organisation guidelines.
Current Building Regulations call for extractor fans in all wet areas of the property including the kitchen, bathroom, utility, en-suite,
WC and trickle vents in all the windows to allow air back into the property, at a cost to the homebuilder.
The Solution - Heat Recovery Systems with quiet operation levels
The Villavent® Heat Recovery system is designed to completely change all the air in the property at least
once every two hours, continually replacing the stale damp air with fresh, warmed, clean, filtered air.
The Villavent® Heat Recovery Ventilation unit recovers 60-70% of the heat normally lost through trickle
vents and other breakout points in the building structure. Systems can recover 70% (crossflow) 80% (rotary wheel) or 90% (counterflow).
By installing a Villavent® Heat Recovery system you are providing filtered fresh air thus creating a
healthier indoor environment alleviating allergy sufferers.
Generally the Villavent® Heat Recovery unit is of Scandinavian construction. The casing is constructed from double skinned galvanised steel sheet with thermal insulation and is very quiet in operation. The large cross flow heat exchanger is manufactured from aluminium giving both higher efficiency and longevity. The British Allergy Approved EU7 pollen bag filter and electric heater battery are fitted as standard in our VX - E/EV range of units.
Our systems comply with the current Building Regulations 2006 Part F and in Scotland standard 3.14 and therefore no noisy extractor fans or draughty trickle ventilators in windows are required.
By negating the need for trickle ventilators in the windows noise pollution and heat loss is greatly reduced.
- British Allergy Approved filtered fresh air - alleviating asthma and hayfever sufferers
- Our heat recovery ventilation units are very quiet in operation
- Excellent heat recovery and enhancement of energy efficiency
- 1 electrical connection and low voltage control panel
- Constant change of air without draughts removing indoor pollution
- No unsightly trickle ventilators in windows
- Quiet extractor fans
- No overrun timers
- Fewer breakout points through the building structure
- Condensation control
- Ventilation system is operational as soon as power is available reducing drying times and speeding decoration
- Easy to install
Heat Recovery Ventilation System - How It Works
Villavent® offer a wide range of Quiet Heat Recovery Ventilation units that can be sited either in the roof
space; above a Villavent® cooker-hood in the kitchen; at high level in a cupboard or alternatively the unit
can be wall mounted.
Ducting connects the stale air exhaust grille to the Heat Recovery Unit and extracts via ducting to all the wet areas of the property. The
stale air passes through the cross-flow heat exchanger and 65-70% of the heat normally lost via trickle vents is recovered.
Fresh air is brought into the property via a separate external grille, passes though the heat exchanger and picks up the heat recovered
from the stale air.
There is no mixing of air flows - only the transfer of heat.
The warmed fresh air is then ducted to all the habitable rooms within the property.
Our electronic (E) loft mounted and wall mounted (VE) range of Heat Recovery units incorporate the most innovative user friendly controls
available on the market today. From the Control panel you can see what is happening within the HRV unit.
Fan speed selection can be made from minimum, normal or maximum with a unique option to select a low medium or a high medium setting to
suit individual requirements.
Supply air temperature can be adjusted in cold external conditions to ensure supply air temperature between 15°C and 20°C. A light
indicates the heater is in operation.
Service indicator is illuminated on the controller when the filters require cleaning/replacement. This is usually factory set to 9 months
but can be adjusted to either 6 or 12 months dependent upon the likely contamination/cleanliness of the air required.
With the electronic controls only a low voltage wire (supplied in 12m cable) is required and additional controllers may be purchased for
different areas of the house. The last activated controller will be the command.
The pollen filter is approved by The British Allergy Foundation and awarded its Seal of Approval on products supplied with EU7 filter.
Cookerhoods
Dependant upon the type of installation Villavent® can offer a range of Heat Recovery Ventilation systems suitable for use with a cooker-hood.
Units are made to site above the cooker in the kitchen or to be sited remotely in a roofspace. Telescopic and a choice of stainless steel cookerhoods are available.
Optional Extras
Summer By-pass Block
In all our Heat Recovery Ventilation units the heat exchanger block can be replaced by a summer by pass block when heat recovery is not
required. This will increase the air flow and may give a cooling effect on hot summer days.
Comfort Cooling® - Villacool™
The Villavent® Comfort Cooling unit can be fitted onto our Heat Recovery system on installation or at a
later date. (However, the supply air ducting must be fully insulated to accommodate the cooling unit.) Rather than being an expensive
thermostatically controlled air conditioning system the Villacool™ unit will cool and dehumidify the supply air by 8-12°C on
outside air temperature, resulting in a 2-3°C temperature drop within the room. This reduction in temperature will vary dependent
on the amount of heat gain within the building and the amount of air provided by the ventilation system.
The Villavent® ELFI electrostatic filter
With ever increasing concern given to the quality of the air we breathe, an additional filter can be supplied. The ELFI electrostatic
filter takes out 97% of airborne particles as small as 0.1 micron i.e. pollen, bacteria, smoke, viruses, country odours and traffic fumes,
thus making it a sound investment for those who suffer from allergies and who have young children.
Compliance
Villavent® Heat Recovery systems are designed to completely change all the air in the property at least once every two hours, continually replacing the stale damp air with fresh, clean filtered air. Our systems comply with the current Building Regulations 2006 Part F and in Scotland standard 3.14 and therefore no noisy extractor fans or draughty trickle ventilators in windows are required.
Click here to view the Heat Recovery Ventilation data sheets
Avenue 2, Station Lane Industrial Estate, Witney, Oxon, OX28 4YL, England