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Heat Recovery

With the improvement in insulation standards and the move towards producing air tight properties, the problem of air quality has become an issue. This is where heat recovery solutions are at their most efficient.

In the past, Building Regulations required extract fans in areas such as bathrooms and kitchens to remove warm moist air and prevent condensation. The improvement in weather seals around doors and windows prevented fresh air from entering the building. With the need for extractor fans the Building Regulations then introduced trickle vents to provide the necessary air changes.

Although this reduced condensation, the continuous air changes within the building also removed a large proportion of the heat.

Heat recovery units are the solution to new and existing homes to overcome these problems.


How Heat Recovery Works.

Lofts and utilities are often used to site the unit although plant rooms are ideal. Warm moist air is extracted from wet areas of a building e.g. utility, kitchen, bathrooms and shower rooms. This air passes into the unit across a heat exchanger where up to 92% of the heat is extracted. The heat is then transferred to fresh air being drawn in from the outside. Warm dry air is then returned to the living areas of the building.

It may seem that the amount of energy required to run the fan for the unit would prove to be expensive but the introduction of DC fan motors can reduce the energy requirements to a minimum. This computes to running the unit for 200 hours at a cost of only around 11 pence. The amount of heat retained by the unit far outweighs this cost which can be further mitigated if the property fitted with solar PV panels, which produce their own electricity.

The system can be operated by hand held remotes and thermostatically controlled. The unit’s require minimum maintenance with most filter’s being changed once a year. The DC motors as well as being very economical are also very quiet in operation.

The overall effect of the unit is to increase the comfort levels within the property, removing moist stale air and replacing it with pre-warmed fresh air. Condensation mould is eliminated and the saving on heating costs is significant.

Systems come in various sizes and capacities depending on house type and the number of air movements required.

To find out more on heat recovery please contact our team at energy BY DESIGN .

Our supply, survey and installation service covers the following areas: Bournemouth, Christchurch, Dorchester, Poole, Romsey, Salisbury, Southampton, Wimborne and Winchester and other areas in Dorset in Hampshire. Site surveys outside a 30 mile radius of Wimborne will incure a charge a £25 which is deductable should you accept our quotation. We are also pleased to invite enquiries from further afield.