HRV Benefits

We ventilate our homes for many reasons, firstly, because we want to comply with building regulations, but mainly because we wish to maintain a healthy and comfortable indoor environment. We could adopt a seemingly simpler and cheaper approach, such as holes in the walls and simple bathroom fans to take out the warm moist air, but as we know this is not be best option in the long run.

Humidity Control
We are very familiar with moisture in the air outside. It is an integral part of our maritime climate in Ireland and the UK. The relative humidity is high and indeed for a lot of the time it is in excess of 88%. For a comfortable indoor environment the humidity should ideally be between 40% and 60%. A heat recovery ventilation system will help achieve this.

Energy Efficiency
With the price of fossil fuels on the rise we, as home-owners, need to consider all options and methods of minimizing our energy requirements. We do this by ensuring that our homes are not just highly insulated but are also draught free. Draughts aren’t just a matter of cold air coming in and warm air leaking out; they also have negative effects on the insulation and prevent it from performing its rated maximum. Draught proofing is classed as being so important that there is now a provision in the Building Regulations (Part L) for measuring the level of draught proofing or air tightness as it is commonly referred to. See Air Tightness FAQs.

This combination of high quality insulation and air tightness measures will produce a suitably low energy solution, but only if combined with a strategy for energy-efficient ventilation.

It is important that any fresh air entering the house does so in a controlled fashion and that exhaust air has had its heat taken from it first and goes out at low temperature. In other words, the heat is recovered from the exhaust air and then used to warm the fresh air going into the house.

In this way, fresh air from outside, no matter how cold it gets, will always enter your house at a comfortable 18 degrees or so. This formula of Insulation + air-tightness + Heat Recovery Ventilation = comfort + health + energy efficiency, and forms the basis for the ultra-low-energy strategy used in building passive houses.

The Benefits

Clean Fresh Air Continuously

Filtered fresh air is circulated throughout your home day and night. On average most people spend over 80% of their time indoors and 50% of all illnesses are either caused or aggravated by poor indoor air quality. The ProAir Heat Recovery Ventilation System will continuously remove stale moist air from your home making it a more suitable and healthy place to live.

Energy Efficient Ventilation

A Heat Recovery Ventilation system will save you money and reduce your energy requirements for heating by re-using the heat that is normally lost via standard extract systems. A Heat Recovery Ventilation system is designed to operate continuously at a low rate to minimise electrical energy consumption. The heat recovered is up to twenty times the energy used to run the fans.

Condensation Elimination

Water vapour will be removed as it is produced. As a result there is no moisture condensation - the main cause of rot, damp, condensation or mould growth.


Comfort levels are superior in a house fitted with a Heat Recovery Ventilation system. Irrespective of weather conditions, draught free balanced ventilation is provided all the time.

Watch our video on the workings of Mechanical Heat Recovery Ventilation.

  • We have HRV in our block-built house. Installed by ProAir of Galway. Very professional and thorough job, highly recommended. Cost was c. 8k, but we have two units due to the size of the house. Been in constant operation since October, no issues so far. Complexity? Turn it on and leave it. When you have a shower/bath press boost. That’s it.

    Ask About Money 01/08
  • We also got ours from ProAir and are very happy with it. We were strapped for extra cash, but our geo-therm. guys recommended the MHRV as a way of making the whole system more efficient. No condensation is a great thing. Your house will be healthier overall.

    Ask About Money 02/08
  • Very happy with my ProAir Ventilation System. They system settings had to be changed to due the hot weather so they talked me through step by step on how to correct. They were extremely helpful. Superb customer service.

    BMcC, Malahide, Dublin, August 2019
  • "We were fighting with a lot of dampness and mould using electric dehumidifiers with little success. The heat recovery ventilation system removed all of the problems. No more dampness, no more mould and our windows are dry in the morning. The installation was done quickly and professionally. Huge thanks to ProAir!"

    G. Stephanovic
  • “Very professional from start to finish, easy to work with and always available and willing to answer a technical question. The unit is very quiet, even on boost mode it’s hardly audible. From my research I found it to be the most efficient on the market also, and it’s manufactured here in Ireland. For the self-builder, I found ProAir very good to work with, they were flexible with the scope of works and the price reflected this. They furnished me with detailed drawings and all the ducting needed, they installed the unit and commissioned at the end, this suited my requirements perfectly”  

    R. Gleese
  • “Installed a full MHRV system in our house we were renovating. Found them very competitively priced and very easy to deal with on technical issues. Highly recommend”

    M. McDonagh
  • “ProAir installed a system in our house in 2008 and never had a day’s problem with it! The air is always fresh and the knock-on effect is, a healthier environment to live in”

    C. Cunningham.
  • “I contacted ProAir for advice and pricing for my self build. The customer service was brilliant and every staff member I encountered was very helpfully explaining the system and answering my queries. The staff who called to site were efficient and professional and called as per the agreed times. I have already recommended ProAir to a friend and would have no hesitation in recommending their services in the future”  

    S. Carr
  • “Extremely happy with our ProAir and their service in general, from my initial phone call to their site visit, installation process and after care service. I found them very easy and helpful to deal with, as well as good value. Constant fresh air and a handy display console to tell me if the system is working correctly or needs a filter change etc. Would highly recommend"  

    C. Naughton
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