Air handling unit
600 LI

  • 86% Passive certified effective heat recovery
    Counterflow heat exchanger with high efficiency
  • Expanded polyethylene casing to ensure high levels of insulation.
  • High efficiency pure polystyrene counter-flow plate exchanger.
  • Low energy EC motors.
  • Totally silent operation.
  • G4 high grade filters. Other levels available
  • Appendix Q listed
€ 2950
(free shipping)
installed from


The PA600i was the original Heat Recovery Ventilation unit designed and developed by ProAir Systems and was created with the larger house in mind. The experience of the time was that self-build dwellings were generally between 400m3 and 600m3 in volume and hence the number 600 was assigned to indicate the optimal house-size for the unit. This Heat Recovery Ventilation unit is best located within the thermal envelope of the house. It can be placed at high level in say a utility room or hotpress in order to save on floor space. If this is not an option it may be placed in the attic.

Installation cost example:

200m² 1/2 storey or 2-storey house with vents in 4-6 bedrooms, living room, sitting room, utility, bathroom and kitchen.

ProAir 600Li ventilation unit (including shipping to site) €2950
+ Projecting and supply of installation kit (steel ducting, tapes, bends, saddles, reducers, hose clips, etc) €1000
+ Cost to install duct and fittings €1000
+ Cost to connect up and commission €200
Extra charge for every hole that needs to be drilled through concrete joisting (if any) – 50€
Total cost €5150

All Prices excluding VAT (23%) – prices for Galway Region – work carried out by Scandinavian Homes Ltd appointed installer – additional travel costs may apply for other regions

How a ventilation and heat recovery system works

The principle for a ventilation-heat recovery system with supply and extract air is simple. Harmful contaminants and moisture held in the interior air is removed via the extraction vents in the “dirty rooms”; kitchen, bath, toilets and utility rooms. Before leaving the house, the old air gives off its heat to the fresh incoming air in the heat-exchange unit.

With a balanced mechanical system, you control the amount of ventilation in the house. Not too much on windy and cold days and enough on humid and mild days. At the same time the incoming air is filtered from dust and pollen. The system allows you to determine where you want the fresh air to be introduced, in what quantities and at what temperature. The fresh new air is normally supplied through a vent in the ceiling in the “clean rooms” such as bedrooms and living rooms.

Passive house ventilation buy ventilation system

A whole house ventilation system helps to provide consistent temperatures though-out the house or apartment. The house or apartment must be reasonably well insulated and draft-proofed for the system to work to its highest potential. The used air, which has now released most of its energy content, is fed out through the exhaust duct (brown duct). This happens most commonly though either a louvered grille or combi-box on an external wall, or through a roof hood.

Ventilation units make your home into a thermos! You retain the heat in the building without the need for unnecessary new thermal energy. As a result your heating system will have a much easier job to do. The kitchen extraction fan is usually kept separate to avoid contamination of the ducts and of the main unit.