It is currently 29 Mar 2024, 15:41
Charlie wrote:In order to preserve Mike's thread. I've moved Charlies perfectly acceptable enquiry here for further discussion by all.
Bobthe ventilation will be via a MVHR (mechanical ventilation with heat recovery) system, which is a simple fan-in-a-box in the loft, with ducts to every room, drawing stale air out and putting fresh air in, continuously, day and night. The difference is that a heat exchanger captures almost all of the heat in the outgoing air, and warms up the incoming air with it. No smells, no mould, no condensation.......ever, anywhere. Climb out of a long hot shower in the middle of winter and you can shave in the mirror straight away without wiping it with a towel. Utterly brilliant bits of kit.
Sorry to hijack your fantastic thread, just wondering if it is possible to retrofit this system to an existing building? My house is cob and condensation is an issue.
the bear wrote:I'm hoping to extend and renovate my place in the near future and I guess running in the pipes would be easier than for most as its a chalet bungalow. Mike, I note on your extension thread you are going to efforts to make it as airtight as possible, what happens in the old part of the house which isn't airtight as most of mine won't be?
Good question !the bear wrote:Also what happens in summer when you want french doors and windows left open all day, is it switched off?
I'd say it does. Trickle-vents are one of those daft ideas IMO. Not every BCO bothers with them.the bear wrote:Does having it fitted negate the need for trickle vents building regs wise?
the bear wrote:Finally does it make any significant difference to heating bills by not having to leave windows open after a shower etc in winter?
the bear wrote:I'm hoping to extend and renovate my place in the near future and I guess running in the pipes would be easier than for most as its a chalet bungalow. Mike, I note on your extension thread you are going to efforts to make it as airtight as possible, what happens in the old part of the house which isn't airtight as most of mine won't be?
the bear wrote:Also what happens in summer when you want french doors and windows left open all day, is it switched off?
the bear wrote:Does having it fitted negate the need for trickle vents building regs wise?
the bear wrote:Finally does it make any significant difference to heating bills by not having to leave windows open after a shower etc in winter?
the bear wrote:Thanks Mike and Roger.
I assume my floors are not insulated given the age of the house. Is that a problem at all. I have read that insulation and air tightness are key to getting the best out of these. I'm not aware of any way to insulate a solid floor short of digging it out and re-pouring over celotex.
Mark
Charlie wrote:My cob house was renovated & extended in 2009 at which time I had not heard of heat recovery systems. As far as I can remember the floor & ceiling joists run the width of the house. The house is longer than its width, so I don't know how the ducts could be run, any suggestions folks?
I suppose the loft ones could run across the top of the joists, provided I used insulated ducts.
Charlie wrote:Charlie wrote:My cob house was renovated & extended in 2009 at which time I had not heard of heat recovery systems. As far as I can remember the floor & ceiling joists run the width of the house. The house is longer than its width, so I don't know how the ducts could be run, any suggestions folks?
I suppose the loft ones could run across the top of the joists, provided I used insulated ducts.
Hi guys, any ideas for running the ducting please?
Mike G wrote:Charlie, I haven't said anything about the joist runs making ducting impossible. Without a drawing I have no idea what we are talking about! Essentially (ideally) you have to located vents in the furthest corner of the room away from the door, and connect them up with 4" pipes. Working from that principle, you are going to have a far better idea of what is possible or not than I ever will.....unless I visit your house or see a drawing.
Charlie wrote:Is there anyway of establishing which way joists are running without lifting the carpets?
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