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submitted 7 months ago by [email protected] to c/[email protected]

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General info: Looking to get current attic ventilator fan replaced. The attic is about 1400 sq. ft. Current attic ventilation fan is a foot from the ridge of the roof. Live in USA.

Handyman wants: To install two 1500 CFM fans. Two 120 volt 20amp dedicated circuits, one for each fan. He wants to install the second fan 4 feet away from the current fan. He stated that the attic ventilator fan would need to be replaced within 6 years.

My questions: Would two fans be better than one fan? Would I need two 120 volt circuits to run two fans? Is there an attic ventilator that has a user replaceable fan?

Thank you in advance for any help.

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[–] [email protected] 7 points 7 months ago* (last edited 7 months ago) (1 children)

Yeah, that 240v line run suggestion puts a gigantic question mark on anything they've suggested at all. I'd recommend a second opinion.

[–] [email protected] 3 points 7 months ago

240v for an attic fan? Wtf?

Yea, fire this "handyman". 240 in the US is for high load devices, like AC, electric stove (electric heat is a direct short), electric water heater.

A fan draws a very small amount of current - less than 5 amps at 120v.

I have a small portable blower (this uses a compressor wheel, so draws more current than a fan), and it's rated for 5 amps.