Question 1

What is MVHR and do I actually need it?

Accepted Answer

Mechanical Ventilation with Heat Recovery supplies filtered fresh air to living rooms and bedrooms while extracting stale air from kitchens and bathrooms, passing both through a heat exchanger so the outgoing air warms the incoming air. It makes most sense in airtight new builds and deep retrofits, where opening windows wastes the heat you have paid for.

Question 2

How much does a ventilation system cost?

Accepted Answer

Our packages start at £490 for consultation and design, £1,490 for a domestic system supplied and installed, and £3,490 for a full MVHR system with commissioning. The final figure depends on property size, duct routes, access and equipment. The survey and the fixed quote that follows it are free.

Question 3

How long does installation take?

Accepted Answer

A flat is usually 7 to 10 working days across first and second fix. A house with a full MVHR system typically runs two to three weeks, and we work around the rest of the programme rather than across it.

Question 4

Will it be noisy?

Accepted Answer

It should not be. Noise comes from undersized ducts, poor unit placement and missing attenuation, not from ventilation itself. We size ducts for low air velocity, mount units on anti-vibration fixings and fit attenuators where the design calls for them.

Question 5

Do you provide a commissioning certificate?

Accepted Answer

Yes. Every terminal is balanced and measured against the design flow rates with calibrated equipment, and you receive the commissioning sheet, the O&M manual and the Part F documentation at handover. Building control will ask for it.

Question 6

How often do the filters need changing?

Accepted Answer

Typically every six to twelve months depending on the location and the filter grade. Central London properties near main roads sit at the shorter end. Our service plans cover the changes and log them for you.

Question 7

Which areas do you cover?

Accepted Answer

London and the South East, including the M25 corridor, Berkshire, Surrey and Hertfordshire. For larger commercial projects we travel further — ask.

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