Forced air outside wood furnaces ?
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Topic: Forced air outside wood furnaces ?
Posted By: DougG
Subject: Forced air outside wood furnaces ?
Date Posted: 04 Aug 2021 at 6:32pm
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Anyone have an outside forced air wood furnace for a house ? I think Bryan is the prime name around here, just want some opinions on any , thanks
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Replies:
Posted By: HD6GTOM
Date Posted: 04 Aug 2021 at 7:29pm
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Folks at our local consignment auction have had 1 for years. They have several, looks like hanging furnaces in the shop and office area, they have fans blowing out air. But they are hooked into the outdoor furnace. It looks like some sorta fluid is pumped thru lines to these "registers". The first furnace they had blew hot air into the building. This Is a former car dealership, large building. The heated fluid furnace is warmer than the forced air unit they previously had.
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Posted By: DougG
Date Posted: 04 Aug 2021 at 7:42pm
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Gottcha, thanks for that - I do think water holds heat better than forced air heat , just looking for opinions on hot air
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Posted By: shameless dude
Date Posted: 04 Aug 2021 at 9:37pm
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everywhere i've seen people that have them, i don't ever see where they keep the wood under cover, always covered with snow or wet from rain. i guess that if i was to have one i would put a roof over it with the wood under the roof too, sure should make it easier to load each time. i have thought of placing a shipping container outside with the wood furnace in it, filling the rest of the container with the wood. could have it blow hot air or pump hot water either way. kinda nice to put a hole in a side wall instead of a roof of what is being heated.
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Posted By: 1951WDNWWI
Date Posted: 04 Aug 2021 at 11:11pm
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We built a shed at my parents house around the outdoor boiler with the boiler tube end sticking out. Easier for maintenance. Nice loadind the wood end inside the shed. You can take nice long hot showers because it has a heat exchanger for the water heater as well as one for the forced air furnace. Dad said if we had built it 16 x 24 it would hold a winters worth of wood. Dad only wanted a 12 x 16 when it was built.
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Posted By: DMiller
Date Posted: 05 Aug 2021 at 4:41am
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Been seeing a number of the older forced air wood furnaces at the local HVAC company, most have cracked heat exchangers they said were due to wider temperature cycling and wood moisture issues as opposed to LP or NG furnaces. Were too costly as near to expense of complete new unit to just replace the heat exchanger. Boilers can have freeze issues if not kept running in winter where if have to go elsewhere for a period of time can freeze and burst piping near the boiler, also need to purchase temperature control system with these(Optional) or end up too hot in open run regions and can damage concrete or discharge coils.
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Posted By: Coke-in-MN
Date Posted: 05 Aug 2021 at 1:12pm
Neighbor used hot water type boiler outside and had exchange coil in hot air plenum on his Propane fired forced air furnace - had pre heat tank on water heater - but for control had another exchange unit in attached garage which acted as wild zone and diverted boiler water to circulate through that when house didn't need heat but boiler was still fired high .
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Posted By: allisbred
Date Posted: 05 Aug 2021 at 1:40pm
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If you have an unlimited supply of wood or very cheap access, they work well especially if set up to load with loader bucket.
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