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Domestic Heat Recovery Ventilation relates to the the supply of Mechanical Heat Recovery and Ventilation Systems (MHRV or HRV Systems) to the Domestic or Residential market.

New Building Techniques, Building Regulations and new Consumer Demands - all of which are based on the need to reduce Carbon emissions and heating bills - are driving rapid changes in ventilation technology.

The concept of “System Ventilation” is one way in which Architects, Specifiers, Builders and heating professionals are responding to these needs. New homes are increasingly Air Tight. The latest revision of Part L of the Building Regulations introduced lower limits on building permeability in 2010 and will require further reductions in 2013 and then again in 2016. The aim is to retain heat within the home, cutting energy losses and fuel bills as well as reducing CO2 emissions.

However, Air Exchange is essential for the health and well-being of the occupants and for the building itself. An average family of four can release around 15 Litres of moisture into the air every day. If the ventilation in the house is not sufficient to deal with this, condensation can build up - leading to problems such as streaming windows, peeling wallpaper and mould growth. In extreme conditions, the damp can affect the structure of the building.

Ventilation is therefore essential - not only to control condensation but to remove odours and atmospheric pollutants and to keep the air fresh.

What Part L of the Building Regulations is specifically designed to halt, is unplanned and uncontrolled Air Exchange. Part F of the Building Regulations therefore sets standards for Ventilation, Air Quality and the control of Condensation.

Stiebel Eltron LWZ 270 Heat Recovery Ventilation System

System Ventilation, which takes a “Whole Building” approach to ventilation needs, is providing the answer to balancing the apparently competing demands of Air-Tightness and adequate Air Exchange. At the same time it is also making a contribution to reducing CO2 emissions and cutting fuel bills.

Mechanical Heat Recovery and Ventilation can provide precise, controlled air extraction, taking moisture and polluted air from areas such as toilets, bathrooms, kitchens and utility rooms, and venting it to the external atmosphere. In so doing, around 90% of the heat in the air being expelled from the building can be recovered to warm the fresh incoming air, with obvious benefits in terms of energy conservation, reduced energy demands and therefore lower fuel bills.

In summary, there are not only environmental, but also health and economic benefits in installing a Heat Recovery and Ventilation system such as the Xpelair or Stiebel Eltron range of products, in a domestic property.