How does Positive Input Ventilation & Heat Recovery work?
The benefits of this are enormous;
- Firstly, it means that a significant proportion of external pollutants are prevented from entering the home.
- Secondly, the use of the otherwise unused heat in the roof results in the ventilation unit providing a significant net energy gain to the home (heat recovery ventialtion).
- Thirdly, there is no better way to ventilate a home than from the inside out via a single, centrally located, supply air diffuser.
A Nuaire Drimaster fitted in your loft, will operate at an almost imperceptible noise level. You will hardly know the Nuaire Drimaster is there. A properly designed and installed unit will ensure that old, contaminated, vapour laden air in your home is continuously diluted, displaced and replaced with good quality air. The result is improved indoor air quality and an environment in which condensation dampness cannot exist.
The old air exits through the thousands of air leakage points found in all homes. Indeed, a Nuaire Drimaster or Flat master (for apartments and bungalows) Â positive input ventilation and heat recovery will even help to suppress unwanted infiltration (draughts).
The installation of a low energy Nuaire Drimaster positive input ventilation unit will ensure the air in your home is completely replaced with better quality air around 20 times a day. This is the recommended rate to maintain good air quality.
Energy benefits
Your roof is an energy source.
South east to south west facing tiles or slates absorb energy from the sun. Even the loft space itself is a substantial source of energy. During the heating season it will almost always be warmer than outside because of solar gain and conduction and convection losses from the home. Positive input ventilation units use the tiles/slates and/or the loft space itself to pre-warm (Heat recovery)Â the incoming air before delivering it into the home.
The input air enters your home at ceiling level, usually on your landing. This method re-circulates the warm air that rises and collects there as well as reducing the heat loss to your loft.
The slight pressurisation effect created helps reduce infiltration of unheated air through the leakage points found in all homes, having a consequential energy benefit.
In simple terms, a good quality low energy positive input ventilation unit will provide a significantly greater amount of energy into the home than the energy it consumes in the form of electricity, providing a considerable net energy gain from the heat recovery effect.
- Clean fresh air is continuously drawn in the loft space through the lofts natural leakage points.
- The air rises to the highest point, gaining heat energy giving you the benefit of some heat recovery
- The air is then passed through the filters and is gently fed into the dwelling via a central hallway diffuser
- The air then gently pressurises the house from inside out, driving out moisture and condensation
- This process creates a clean healthy environment to live in as fresh air replaces the stale air.
