Backdraft Dampers

[Kungur]

I am going to be adding a solid fuel furnace in my home> I have an exsisting lp forced air furnace that I will be keeping. I am thinking about adding backdraft dampers, one in each furnace in order to isolate each unit. I have worked out the diagram and located theunits,either Honeywell or Aprilaire, both of which are motorized.
What I am thinking of is to install 1 at the top of the exsisting plenum which will be "normally closed" . But will open when the solid fuel unit is down and the LP gas unit calls for heat.
Am I going in the right direction?
Thanks,
Tom

[Corpsie]

1. Read the forum rules: NO DIY
2. If you are licensed, apply to become a pro-member and post this in proper forum.
3. Thread is probably going to be locked soon
4. IBTL.

[beenthere]

Back draft dampers should be weighted/barometric, not motorized.

Thats all I'll tell you.

[superheatrman]

Are these dampers to isolate ductwork, suppy air? Or isolate vent products of combustion?

[Kungur]

This is to isolate the lp furnace while the solid fuel furnace is operating.
Thanks Superheatman!

[jrbenny]

http://www.hvac-talk.com/vbb/showthread.php?t=186644