How to deal with odor coming up from basement?
我住在新斯科舍省。中度热，有时甚至相当潮湿的夏天，寒冷的冬季虽然很可变。与我们东北类似。
House is 120 years old. Basement has two areas–main one about 1600 square feet and other under rear extension about 200 sq. ft. Half of main basement is 6 ft high, rest is 3 ft. Extension is all 3 ft. crawl space. Basement has vapour barrier on floor and spray foam on walls. No insulation below floor of living area. Access is via steps outside house. Basement has moderate odour (worse in extension) but is quite dry with humidity around 50%. Old well in basement is sealed off except for small hole to allow sump pump float.
12个月前，我安装了热泵和所有新的管道工作。立即在房屋中看到地下室气味，显然是通过管道出现的。空调上没有异味问题，也没有热量或空调。
我现在认为问题不是由供暖系统中的泄漏引起的，而是由于地下室和主房屋之间的压力不均匀引起的，这导致了气味。已关闭所有通风孔，使温暖的空气进入地下室，并在窗户中使用提取器风扇进行实验。确定的改进，但不是完全。
Do you think i am on the right track? If so, what is best kind of fan to install permanently? Or should I install a Humidex? Would it be wise to add a second fan in the extension area as this is closed off from main basement apart from small entrance (about 2 by 3 ft)? Will running two fans cause any problems with pressure etc? Also, should I provide for make up air as required by US code (not sure about Canadian requirements). I am wary about opening up basement to living area into smells get up through vent. Blogs on this site offer varying opinions on the need for make up air. The main house has been retrofitted for improved energy efficiency but still has rate of 5.3 air changes an hour. Basement is pretty tight especially when I seal up the two small windows.
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Replies
大卫，
解决问题的最佳解决方案是找到气味的来源，并减轻允许气味发展的条件。那将是一个永久的解决方案。
A temporary solution would be to seal air leaks in your basement ceiling and to depressurize your basement with an exhaust fan, to limit the amount of basement air that reaches your living space. This approach wastes energy, and is therefore undesirable.
An odor in your basement can have a variety of causes. It might be sewer gas, due to a plumbing problem. It might be a dead animal. Or it might be mold. You need to do a little detective work to find the source of your odor.
如果您的地下室气味是霉菌，那么您需要采取所有必需的步骤来干燥地下室。这是一篇文章，可以帮助您处理该任务：Fixing a Wet Basement.
如果您的气味有另一个来源，则需要找到来源并解决问题。
如果要降低地下室以减少气味，则可以在地下室窗口中安装排气风扇。听起来您已经尝试了这种补救措施，但是您仍然有气味。这使我相信您确实有一个主要的气味问题，现在该找出气味的来源了。
Of course, an unbalanced HVAC distribution system can cause problems. If you suspect that your supply ducts and return ducts aren't balanced, you should hire a home performance contractor to check your duct system. All of the seams in your duct system should be sealed with mastic, and you need to be sure that the air flows through your supply system and return system are balanced.