You are reading a single comment by @hugo7 and its replies.
Click here to read the full conversation.
-
Cheers.
We have a minor mold issue, so I wondered about the more budget kind.
What do you think it's added on to the cost of your loft?
For what it is, it looks pretty compact.
hugo7-
I've got zero experience of dMVHR (decentralised, single-room) units, aside from reading that they can be quite loud.
Our Zehnder MVHR system, including installation and commissioning, is ~£3K, but that's at mates'-rates (installer is a friend who's also supplying the ASHP). It would have been more than double that otherwise, putting it beyond affordability for us. Also, unless your house is already being refurbed, it's very long, invasive and expensive to rip the place apart running ducts everywhere. For us, it was a case of 'now or never'.
ectoplasmosis
It’s a whole-house system, every habitable room has supply/extract/both.
We’re trying to make the house as insulated and airtight as possible, which then requires active ventilation. MVHR recovers heat from extracted air, imparts it onto the filtered fresh incoming air, so you’re not constantly paying to heat new cold air.
Aside from the ventilation and heat recovery, my lungs are a bit ropey from having grown up near Chernobyl so I don’t cope well with mould/damp; effectively MVHR eliminates these things.
I visited a few houses with MVHR before committing; it makes a massive difference to the air quality and feeling of ‘freshness’, especially in a previously musty old Victorian house. My sister’s new-build flat came with it installed, and always feels nice, airy and comfy, with no cat litter or greasy cooking smells.
It was a ballache finding routes for all the ducts, and the bath is a bit of a squeeze due to all the shit crammed in the corner, but it was a one-time opportunity to get it installed and a no-brainer for me.