Question about Rinnai RHFE-1004FA 38,400 BTU Energy Saver Ductless Heater - LP Gas

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Rinnai 1004F Heating the Outdoors!

I have a propane-fueled Rinnai 1004F used to heat the upper floor of my house. I have used the Rinnai for 3 years now with no problems.

Since turning the unit on this winter, we have been going through much more propane than normal. The Rinnai has been running for long periods of time, seemingly being on more than it's off.

This morning, I checked around the outside vent to make sure a good seal exists, and that cold air was not infiltrating the house. What I found was warm air coming directly out of the vent.

Granted, it's about 5 degrees out, so the air being exhausted wouldn't take much to feel warm. But this was warm air, not 50 degree air.

I thought Rinnai used outside air to pull the exhaust out, which should make the vented air relatively close to outside temperature? It just seems that the air coming out is much too warm, and could explain why the Rinnai is running so long, so often, as compared to past years.

Anybody know? Oh yeah, I recently removed the front cover and top panel and got any dust out of the unit. So dirty filters or fans is not the problem here.

Thanks for any help/insight!

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Do you have the Economy button on? If so, and you have a large space to heat or the outside temp is very cold the unit may not be able to keep up. If this is the case the stove runs forever, trying to reduce the temp by 2 degrees every 30 minutes. This may not work for your space and outside temp.

Your ideas about the intake and exhaust are not quit right. There is a fan that pulls air from outside over the outside of the exhaust pipe (to preheat it). This fan actually pushed the combustion gasses all the way out the exhaust. The exhaust exiting should be a little hot. In very cold temps, frost can build up around the air intake, which is right around the exhaust pipe. If you see this you will need to keep it clean. It is a good idea to look at the exhaust everyday when it really cold.

Good luck,

Tom Hawkins
Bethel, Alaska
hawkins111@gci.net

Posted on Jan 10, 2009

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