An attic fan with a few blades may pick up a humming noise as it runs on a high speed setting. The only way to get rid of this hum is to continually operate the fan on a low setting or replace the ...

Q: Tim, what can you tell me about whole-house fans and attic fans? Do they really work to cool an attic space? I’m not sure which one I should consider since I have air conditioning.

Dear Ken: We have a 2,500-square-foot house and want to put in an attic fan. What should we look for and what are the things we should know? — Tim Answer: This is a wonderful system for our area.