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<blockquote data-quote="ProDave" data-source="post: 476459" data-attributes="member: 6969"><p>You made the mistake of getting an electrician to fit an mvhr unit. Yes he should connect the power to it but that is all. It seems like UFH, there are a lot of electricians that don't have a clue about mvhr, so you should not trust them to install the ducting.</p><p></p><p>In short, the mvhr has one inlet taking air from outside, this passes through one side of it's heat exchanger, and then that supplies fresh air into every living room and bedrooom.</p><p></p><p>It then extracts air from every bathroom, kitchen and utility room, which again passes through the other side of the heat exchanger in the unit before being exhausted out of the house.</p><p></p><p>So you do only need one duct to each room, and some are fresh air supply and some are exhaust air removal.</p><p></p><p>There are 2 ways of piping the ducting, one is with big fat pipes that then branch off to each room, or the alternative (the one my house has) is the main supply and extract each goes to a plenum box, from where individual smaller ducts go directly to each room.</p><p></p><p>Do you have a pipework drawing of how the ducting was installed?</p></blockquote><p></p>
[QUOTE="ProDave, post: 476459, member: 6969"] You made the mistake of getting an electrician to fit an mvhr unit. Yes he should connect the power to it but that is all. It seems like UFH, there are a lot of electricians that don't have a clue about mvhr, so you should not trust them to install the ducting. In short, the mvhr has one inlet taking air from outside, this passes through one side of it's heat exchanger, and then that supplies fresh air into every living room and bedrooom. It then extracts air from every bathroom, kitchen and utility room, which again passes through the other side of the heat exchanger in the unit before being exhausted out of the house. So you do only need one duct to each room, and some are fresh air supply and some are exhaust air removal. There are 2 ways of piping the ducting, one is with big fat pipes that then branch off to each room, or the alternative (the one my house has) is the main supply and extract each goes to a plenum box, from where individual smaller ducts go directly to each room. Do you have a pipework drawing of how the ducting was installed? [/QUOTE]
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