Fire suppression and MVHR

[Post and beam]

This is more of a question of ' what happens if....'

 

In a very airtight house under conditions where a fire starts. If your MVHR unit has a shut down/seals off air supply does the fire extinguish before any real damage is done?

 

The level of oxygen that will put a fire out is not that low and will certainly still support life.

 

No i dont intend to put it to the test

[Kelvin]

When our friends self-build caught fire the actual fire damage was minimal (just the roof) but the rest of the house was ruined due to smoke damage  and water damage. 

[Mike]

On balance I'd imagine that it would be a plus to keep the MVHR unit running to provide some measure of smoke extraction during the evacuation. But it would be interesting to read something from a fire safety engineer.