ventilation with HRV

Heat recovery ventilation (HRV) ensures that the foul air leaves the dwelling and is replaced by clean, fresh outdoor air. But not just that: before the cold outdoor air is drawn in, it is warmed with the heat from the used, exhaust air by the HRV unit, which contains a heat exchanger.
In this way, the energy/heat that is present indoors is re-used and, as a result, heat-recovery ventilation also ensures that you save on your heating costs.

Due to its high efficiency, installation of a heat-recovery system in your home is a good investment, both in terms of economics and sustainability.

The HRV ventilation system includes fans and a heat exchanger. Used air is exhausted from the dwelling via valves in the ‘wet rooms’ such as the kitchen, bathroom and toilet, passing the heat exchanger in the HRV unit. The fresh air that is drawn into the dwelling from outside (usually via the roof) is also fed past the heat exchanger and warmed up there.

The fresh, warmed air is then distributed via the air ducts in the dwelling, providing healthy air and a pleasant temperature in the living room and bedrooms. During this process, the clean, fresh air flow and the dirty, used air flow are completely segregated. Only heat is exchanged.

In this way the heat can be retained, which is a benefit in relation to a mechanical ventilation system without heat recovery.

On summer’s days it is not necessary (unpleasant, even) if warm air enters the dwelling. Under those circumstances an (automatic) by-pass ensures that the system does not warm the air. However, fresh air is still fed into the dwelling.

And, at night time in the summer months, when the air outside is cooler than inside, the HRV system ensures that the indoor temperature is reduced to a comfortable level. In this way, the air in the dwelling is cooled without the need to open a window. One advantage of this is that you keep mosquitoes and other pests out.