In-line duct fan w/auto-safety shutoff?

[severtki]

Our woodstove is in a back room with a cathedral ceiling that is not connected to the upstairs of the rest of the house, though it shares a common wall. I'd like to add a simple 6" duct with an in-line fan to blow hot air from the warm room through the wall to the cold upstairs of the rest of the house.

I've been advised, and I seem to remember reading something about it on this forum once upon a time, to buy an auto-shutoff damper system in case of fire so that the duct doesn't shoot smoke or other vapors into the sleeping area of the house. I would guess it shuts the damper closed automatically at 160 degrees or similar temp.

Could anyone point me to a product/manufacturer for this kind of thing? I've checked the most obvious places and no luck so far.

Thanks!
k

 

[Hogwildz]

I bought 2 of this guy on Ebay.
Damn good prices!
(broken link removed to http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=270214109384)

 

[severtki]

Thanks for the quick reply and the link! Doesn't have a lot of information on it, though -- vertical or horizontal installation OK?

I'm assuming that when the fuse link hits a certain temp (160?) it melts and shuts the duct off by gravity. It is a lot cheaper than what I was told it would cost -- which is great, of course! -- but does make me wonder if there's any reason to spend more?

Thanks again,
k

 

[fossil]

That's not a fan, just a fire damper. Probably no built-in provision for shutting off power to an in-line fan. Rick

 

[Hogwildz]

Thanks for the quick reply and the link! Doesn't have a lot of information on it, though -- vertical or horizontal installation OK?
Yes approved for both. Theres a tag inside with directional arrow.

I'm assuming that when the fuse link hits a certain temp (160?) it melts and shuts the duct off by gravity. It is a lot cheaper than what I was told it would cost -- which is great, of course! -- but does make me wonder if there's any reason to spend more?
Yeap fuse link, it holds a spring loaded accordion type metal door that springs closed when the fuse link melts. Its about $85.00 or more from a manufacturer dealer.
It is only the fire damper, fan is a separate thing. I got 2- 6" fantech fans for about $130.00 each. They put out serious air & are overload protected and will shut done & reset. Meaning they are set to shut down at a certain over load, which a fire is sure to cause at a point. Good for a fire, they will shut down, and will not go back on if they burn or electrical burns up. The cheaper inline fans are a one & done overload protection, so if you by accident short them they are toast. The cheaper ones are NOT speed switch controllable, the higher priced ones like I bought are, and I have both on fan speed controller switches.

Thanks again,
k

 

[severtki]

Thanks -- this helps a lot. I purchased a Fantech 6" fan, speed control switch, and the fire damper from your link. Total for everything was just over $200, but I think worth it for the heat it will kick out.

I'm measuring everything I spend on this project in gallons of fuel oil -- so the ductwork cost me about 40 gallons... (8 days' worth before woodstove)
k