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| Green Building Bible, Fourth Edition |
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These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment. PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book. |
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Posted By: Peter_in_HungaryWould it be reasonable to route the MVHR intake and exhaust under the eaves out to gutter level (about 60cm from the wall). I can get about 3M separation.Sounds fairly sensible, as long as they're not being dripped on etc.
I plan to put a humidity stat to automatically switch the MVHR to boost. What RH should trigger the Boost?Make it adjustable (by you, not the tenant) in case of problems, but I'd suggest 60% as a starting point.
I plan to use the MVHR as the (windowless) shower/loo room vent with a switch to boost when the light is turned on. Bad idea or OK ??Depends entirely on where the vents are. Cross draughts when wet are uncomfortable. I turn the MVHR DOWN rather than UP when I shower! Then I turn it up afterwards. But that's a relatively responsible me; dunno what the best plan is for an unknown tenant, apart from careful placement of the inlet (door undercut?) and extract terminal.
The kitchen area will have a recirculating cooker hood which the tenants may or may not use. How far away should the extract be from the cooking area to avoid too much contamination of the MVHR filters.Ours is about 3-4 m away but still gets more dirt than all the other terminals. I fitted an extract terminal with a filter (looks like this https://www.paulheatrecovery.co.uk/product/v125-fb-filtered-kitchen-extract-terminal/ but was a lot cheaper IIRC). Both that and the MVHR filters need to be cleaned/exchanged regularly - we do it every 3 months.
Posted By: Peter_in_HungaryWould it be reasonable to route the MVHR intake and exhaust under the eaves out to gutter level (about 60cm from the wall). I can get about 3M separation.Sounds OK, provided they're both on the same elevation.
Posted By: Peter_in_HungaryI plan to put a humidity stat to automatically switch the MVHR to boost. What RH should trigger the Boost?Ideally you'd switch to boost if the RH rises by a few % over the course of a few minutes, rather than at a set percentage. That could be measured in the duct or the MVHR unit (where it could also take into account steam from cooking); it doesn't have to be in the bathroom. I also remember seeing that someone put a flow meter on the hot water pipe to trigger boost after a couple of minutes of constant flow. Either is likely to require some software to monitor the sensors. I've not decided which I'll use on my current project, though I'll have both sensors anyway.
Posted By: Peter_in_HungaryI plan to use the MVHR as the (windowless) shower/loo room vent with a switch to boost when the light is turned on. Bad idea or OK ??Well it wouldn't be necessary every time. I plan to fit a manual boost button & leave it up to the occupant's nose.
Posted By: Peter_in_HungaryThe kitchen area will have a recirculating cooker hood which the tenants may or may not use. How far away should the extract be from the cooking area to avoid too much contamination of the MVHR filters.A couple of metres or so if you have space, and make sure that it (and preferably all other extracts) has a filter at the valve. Note too that, if you look deep enough in the cooker hood specs, you should find their grease filter efficiency rating (a bit like the Energy Rating) to indicate how much good it's going to do - many are surprisingly bad.
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