New answers tagged ventilation
Yes, my parents have had one of these gadgets since the 1980s: http://www.acehardware.com/product/index.jsp?productId=1273159 http://www.amazon.com/Dryer-Heat-energy-Saver-aceex12/dp/B000H5PTI6 At the time, I seem to recall that running the dryer was something like 10k BTUs, which was significant. However: new washing machines spin much faster, and ...
The fan should have a damper, as should the vent. If you insulate the pipe in between, that should go a long way in helping things. It won't be air tight, of course. It is a hole in your ceiling, after all. But it should help. Keep in mind that you're sucking way more heat out when the fan is on than is likely escaping the entire rest of the day. With ...
You probably want to install some kind of a damper or louvers that will minimize air exchange through the vent when the fan is shut off, right? I would expect that the fan assembly itself might have a damper built into it, but maybe the housing is binding the damper. Or maybe it doesn't have one. http://www.batticdoor.com/bathfandraftblocker.html ...
Sealing the seams will not increase the R-value of the insulation. However, sealing the seams is important as an air infiltration/moisture seal, preventing air from infiltrating and, as a result, preventing moisture (condensation) from occurring between the foam board and batt. Typically expanding foam creates a better, longer-lasting seal than tape.
Top 50 recent answers are included