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Most people are familiar with basic Mechanical Ventilation systems such as bathroom ventilation fans or an extractor fan over a cooker. However, it’s important to note that these are only used to extract air, and have no influence whatsoever over incoming air.

A Heat Recovery & Ventilation (HRV) System not only extracts air, but replaces it with fresh outdoor air, using a heat exchanger inside the HRV system to absorb the heat from the stale, outgoing air, to pre-heat the incoming fresh air.

As Building Regulations for new homes become more demanding, resulting in higher levels of Insulation and increased Airtightness, easy access to fresh air within the building is something that must be taken into consideration.

The concept of a “Passive House” is based on the principle that the building is effectively sealed and no air enters or leaves the building in an uncontrolled manner. As you might expect, the air indoors can quickly become contaminated with pollutants such as dust and pollen, not to mention carbon monoxide.

According to experts in this area, the air inside a home should be exchanged with fresh air at least 8 times in a 24-hour period. Heat Recovery and Ventilation systems present an effective remedy to this situation, by removing dust and pollen from the air (which alleviates sufferers from asthma), extracting and expelling carbon monoxide and reducing the burden of utility bills, by up to as much as 30%.

Heat Recovery Ventilation - Benefits

(i) Moist, contaminated air is continuously replaced with temperature controlled, filtered fresh air.

(ii) Controlled and balanced ventilation is achieved within the building.

(iii) Superior quality of life due to the elimination of dust and pollen.

(iv) Environmentally friendly system - existing heat energy within the building is redeployed.

(v) Significant cost savings on utility bills (up to 30%).

Heat Recovery Ventilation - Considerations

(i) Is there adequate space available in the attic to install the HRV system?

(ii) Is there access available to a gable wall in the attic or to the roof area to install Air Inlets / Outlets?

(iii) Where two floors (or more) are concerned, is the HRV system required for the upper floor only, or for the entire property?

Heat Recovery Ventilation - Grants

Please click on the link to read more about Domestic HRV.