Unit1, Building 3, Port link Business Park, Port Road, Letterkenny, Co.Donegal
Heat Recovery Ventilation System
How it works?
The main issue with traditional ventilation was heat loss. To bring fresh air into a room you opened a door, window, vent or you switched on an electric ventilation fan.

With these, fresh air was permitted to enter the room and stale air went out taking with it a portion of the heat from the room.
Heat Recovery Ventilation allows a room to be ventilated but uses the heat in the air going out to warm the fresh air coming in. A highly efficient system will allow very little overall heat loss.
These types of system utilise a series of ducting pipes and air ducts to carry fresh air around the building and the same to carry stale air out.
The main heat recovery transfer happens in a box that is normally located in the attic in the case of residential buildings. In this box the warm stale air is brought through and its heat is passed to the fresh air from outside as it is drawn into the building. It is important to note that the fresh and stale air are not mixed together in this process. The fresh and warmed air is then passed down the ducting into the rooms of the building.
Fresh air with little or no heat loss.

Main features and Benefits Of HRV

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Constant supply of clean, fresh air for your home

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Constant supply of clean, fresh air for your home

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Save 15%-20% on your heating bills

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comfortable climate Control

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Heat recovery

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Eliminate Mould & Mildew

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Removes Radon

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Reduces demand on existing heating system

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No draft sensation-“no hole in the wall”

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Less dust,less spiders as they fedd on dust mites

Maintenance of HRV System:

We recommend that the filters are checked every 3-4 months. A very important aspect of maintaining the up keep of your system is filter replacement. We advise doing so at least once a year, however, the frequency can depend on the following:
1. Your geographical location
2. The number of people in the house
3. System Usage.

Different times of year?

During normal operation the heat recovery unit runs at a low constant speed but can be boosted when a higher ventilation rate is required. An example of when a boosted ventilation rate would be required would be when the humidity levels reach a set point, showering, cooking or bathing could cause this. Additionally, a summer by pass function can be utilised for the warmer days of the year, helping to maintain the property’s comfort levels. When the summer by pass function is selected the extracted stale, air does not exchange its heat energy to the incoming fresh filtered air. Effectively by passing the heat recovery process.

Cost of Running an HRV system?

This really depends on the size of the unit, the design of the system and the size of your home.

Why should I install a HR system?

If your house is built to a good standard with good quality windows and insulation, it does not make sense to then drill large holes in the wall of each room to provide ventilation.
Depending on the wind direction, you may be losing excessive heat or not ventilating your home at all. By installing heat recovery ventilation systems, you can block up those 6″ holes and let our fans quietly and constantly ventilate the house, while extracting any usefully heat from the exhaust air from kitchens and bathrooms.
With the Heat Recovery Ventilation (HRV) system installed, bedrooms are fresh in the morning and the house doesn’t smell after cooking because when you were sleeping, the system has been working hard to remove all the stale smells and replace the air with fresh, filtered and heated outdoor air. If you suffer with condensation on walls or windows, or you have mould in corners of rooms, then Heat Recovery Ventilation (HRV) solution will fix this overnight.