Building Air Pressure Testing and MVHR Fitting

Airtight House Testing

Airtight House Testing are based in North Wales – Llangollen – but travel for air-testing and MVHR fitting. We are happy to give help and advice in the planning stages and will do early site visits, if wanted, prior to fitting.

Airflow through house during airtight house testing

During our airtight house testing, our tests will pick up the different sources of heat loss from air leakage

We offer three main services:

MVHR fitting

Mechanical Ventilation Heat Recovery (MVHR) systems are a way of recovering heat from air before it leaves your house – most often from bathrooms and kitchens. They work best (economically) in houses that are very airtight: our magic number for installing MVHR is an airtight house testing result of 3 m3/hr per m3. When installed properly in a well sealed and insulated building, a MVHR system can help a house ‘heat itself’ with the warmth given off by occupants and appliances.

More about our MVHR fitting service

Airtight house testing

A house can never be energy efficient without being airtight.   This is now a requirement under UK Building Regs for all new houses which have to meet a standard. Even if you have an old house you are renovating to save energy it is very useful to know how leaky the house is, where the leaks are and if you now need permanent mechanical ventilation. Though we are no longer registered – the costs of membership were too high for the volume of testing we did – we still can measure the leakiness of your property.  We’ll discover where the air leaks by de-pressurising the inside of your building and using our precision equipment to calculate how much your house leaks.

More about Building air pressure testing 

Project managing

With over 40 years in the building trade I have seen the changes in house building regulations to improve the energy efficiency of the houses and I have watched how badly enforced the regulations can be. Badly fitted insulation, poor attention to sealing windows, a cavalier attitude to air tightness etc. Insulation levels can be specified but if there are gaps in the insulation then you have a bucket with a hole which isn’t really a bucket! A house can never be energy efficient without being airtight. This is obvious and much harder to achieve than many think. A good project manager who knows about air tightness can save the project money.

More about our Project Management services