MVHR
MVHR, Heat Pumps and Indoor Air Quality: What Homeowners Should Know
A clear guide to MVHR installation, airtight homes, ventilation, heat pumps and why indoor air quality matters in modern retrofit and renovation projects.
Why MVHR is becoming part of the conversation
As homeowners improve insulation, replace windows and make houses more airtight, ventilation becomes more important. A warmer home is not automatically a healthier home if stale air, moisture and pollutants are not managed.
MVHR, or mechanical ventilation with heat recovery, is designed to remove stale air and bring in fresh filtered air while recovering some heat from the outgoing air.
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Where MVHR works best
MVHR is usually strongest in new builds, deep retrofits, extensions and renovation projects where airtightness is being improved as part of the wider work.
It is not always the right answer for every existing home. Duct routes, airtightness, building fabric and installation disruption all need to be considered.
How it links with heat pumps
A heat pump looks after space heating and hot water. MVHR looks after controlled ventilation and air quality. They are different systems, but they can work well together in homes designed for lower heat demand and steady comfort.
The key is to plan them together so ductwork, cylinders, plant space and controls do not fight each other.
The right next step
If you are renovating or planning a low-energy home, ask about MVHR early. It is much easier to design routes and plant space before walls, ceilings and finishes are closed up.
COMPASS can help you decide whether MVHR belongs in the project or whether simpler ventilation measures are more suitable.
Useful next steps
Next steps
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Read articleFAQ
No. MVHR is most relevant for airtight homes, new builds, deep retrofits and renovations where controlled ventilation can be designed properly.