- Thread starter Onoff
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Onoff
In the land of the unfinished project I am King!
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Seems you can buy it ready insulated:
I don't though think I need to insulate all the ducts?
- Incoming air duct to the MVHR unit, thinking no. Outside ambient should be similar to the cold roof space.
- Warm, wet extract duct running through loft from MVHR unit to tile vent, yes.
- Warm, wet intake duct from bathroom to MVHR unit, yes as runs through cold roof space.
- Warmed, fresh air duct to the ceiling vent outside the bathroom, yes as runs through cold space.
I don't though think I need to insulate all the ducts?
- Incoming air duct to the MVHR unit, thinking no. Outside ambient should be similar to the cold roof space.
- Warm, wet extract duct running through loft from MVHR unit to tile vent, yes.
- Warm, wet intake duct from bathroom to MVHR unit, yes as runs through cold roof space.
- Warmed, fresh air duct to the ceiling vent outside the bathroom, yes as runs through cold space.
Pigeon_Droppings2
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As mentioned before...I try to avoid vertical ducts...any condensation could run downwards. Also horizontals should slope downwards to the exit for the same reason.
Sometimes it can't be avoided...in which case keep the vertical as short as possible and insulated well (then cross fingers and toes).
Sometimes it can't be avoided...in which case keep the vertical as short as possible and insulated well (then cross fingers and toes).
Gareth J
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Don't forget, if you put the box in the unheated loft, you'll need to insulate it too. Otherwise it'll loose a big chunk of any pre-warming. Some come with built in insulation but more is better.
If there's any risk of sweaty bathroom air entering the loft, probably ought to insulate the cold pipes too. Though tucking everything under 12" of rock wool will solve a lot of that.
If going the duct/separate unit route, if there is space anywhere to hang it below the ceiling (airing cupboard?) that will make checking filters easier it will be more likely to get done.
If there's any risk of sweaty bathroom air entering the loft, probably ought to insulate the cold pipes too. Though tucking everything under 12" of rock wool will solve a lot of that.
If going the duct/separate unit route, if there is space anywhere to hang it below the ceiling (airing cupboard?) that will make checking filters easier it will be more likely to get done.
