Der Da
2012-07-25 13:13:30
- #1
I just need to ask quickly: condensing boiler and ventilation under the roof? I assume, judging by the pictures, you are building a pitched roof with a 38-degree pitch. This will give you an attic if the floor area is similar to our plan, which in the middle is about 1.5m high. Then you still have to subtract the floorboards. Is the entire roof insulated? Or is it designed as a cold roof, meaning the insulation is in the ceiling of the upper floor? If it is a cold roof, and you have -15 degrees again in winter, it can happen that something freezes up there.
Furthermore, the installation in the attic has additional disadvantages:
- The installer will not like having to crawl around on the floor, or will have difficulty handling his equipment there.
- You might hear the system in the upper floor, unless you provide sound insulation.
- If something happens (water damage), the whole mess will run through your house from above.
- You have to go to the attic for every adjustment (winter, summer, and filter change in ventilation). Can you still do that at 70?
- As already mentioned, the system is exposed to weather, i.e. high and low temperatures.
- What we were also told: the waste heat generated cannot be used in the house. (I’m not sure if that really matters.)
- Build ceiling opening large enough so that you can get the thing down again in an emergency without having to remove the roof.
- As far as I know, a ventilation system is not exactly quiet in various operating phases. Here too, a condensate drain must be provided.
- If it is a cold roof, the ventilation ducts must be very well insulated, otherwise you will get condensate in the pipes. (I read in another forum that someone had condensate running out of the exhaust vents because the ventilation pipes up there were not insulated.)
- Where to put the hot water tank?
These are at least the infos we collected when we had the same idea. The whole project would have given us 8 sqm more living space and saved about €2000, but the risks were not worth it to us. I can’t really say whether it all really applies, I don’t know anyone who has put it under the roof. We only talked to one provider and one installer. Both were very opposed to it.
Maybe Bauexperte and €uro can say something about this :)
Furthermore, the installation in the attic has additional disadvantages:
- The installer will not like having to crawl around on the floor, or will have difficulty handling his equipment there.
- You might hear the system in the upper floor, unless you provide sound insulation.
- If something happens (water damage), the whole mess will run through your house from above.
- You have to go to the attic for every adjustment (winter, summer, and filter change in ventilation). Can you still do that at 70?
- As already mentioned, the system is exposed to weather, i.e. high and low temperatures.
- What we were also told: the waste heat generated cannot be used in the house. (I’m not sure if that really matters.)
- Build ceiling opening large enough so that you can get the thing down again in an emergency without having to remove the roof.
- As far as I know, a ventilation system is not exactly quiet in various operating phases. Here too, a condensate drain must be provided.
- If it is a cold roof, the ventilation ducts must be very well insulated, otherwise you will get condensate in the pipes. (I read in another forum that someone had condensate running out of the exhaust vents because the ventilation pipes up there were not insulated.)
- Where to put the hot water tank?
These are at least the infos we collected when we had the same idea. The whole project would have given us 8 sqm more living space and saved about €2000, but the risks were not worth it to us. I can’t really say whether it all really applies, I don’t know anyone who has put it under the roof. We only talked to one provider and one installer. Both were very opposed to it.
Maybe Bauexperte and €uro can say something about this :)