Return air backflow damper

[TheBigIron]

I recently purchased a Tundra for my home and currently haven't started the install because of the weather. I understand the purpose of a backflow damper to protect my A-coil in my gas furnace and will install this damper once I get started with my install. My question is when I hook into my gas furnace supply ducts and return ducts, do I need a backflow damper between my return ducts and the Tundra? I haven't read any info about this and I am curious. Don't want air conditioned air pulling through my Tundra during the summer time..

Any input would be appreciated...

Thanks Dave

 

[3fordasho]

I plan on installing 2-8"manual dampers in the hot air ducts from my Tundra to my propane forced air furnace plenum. Open during heating season, closed for a/c season to prevent conditioned air into the tundra and out the return air inlet. Don't think I want anything spring loaded because I want those to be open in the event of a power failure to hopefully prevent overheating if the tundra is fired up (allow convective flow).