Attic Fan lockout relay with Furnace


  #1  
Old 07-20-06, 08:13 PM
mxw128
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Attic Fan lockout relay with Furnace

I'm installing a powered attic fan and the directions state that I should have a lockout relay installed so the fan cannot run while my furnace is running (the fan only needs to be disabled during furnace operation, not A/C operation). How would I set this up and where can I get this type of relay?

I was originally thinking of just wiring a switch into the fan and turning it off when I switch my thermostat over to HEAT, but I wouldn't mind making a little more robust install.
 
  #2  
Old 07-21-06, 02:56 PM
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Easy

You don't need any kind of control other that setting the thermostat for the attic fan so the fan won't come on until the attic temperature reaches ±105º. This should never happen during the heating season.
 
 

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