Has anyone used there furnace exhaust to heat there green house or room?

So its starting to get a little cold during the evenings in my green house and my greenhouse is currently close to my homes furnace exhaust which spits out a lot of warm air. Im just wondering if i could use this free warm exhaust air and hopefully heat my small greenhouse with it. Has anyone done this? Im afraid I'm going to kill my plants with some kind of bad engine exhaust coming from my furnace.

the gas is carbon Monoxide, and it is very toxic.

Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air. It is toxic to humans and animals when encountered in higher concentrations

yea, king of the bad ideas, let it go from your mind, never to be thought of again.

Peace and Safe Grows

Asmallvoice

Hilarious thread. Either that or the J I just put out makes it seem so.

Ok so that was a bad idea... the only reason i thought of this was back a few years ago i had a grow and i was bringing cool air from the cross pace basement to cool my room and at that time the furnace was also in the basement crosspace. I kind of thought it would be a bad idea but I'm glad i checked twice.

The RIU General Marijuana Growing Forum....Saving lives one grower at a time.

The only thing I would do is rout your dryer vent into the room during the winter. I know you don't do laundry all the time but it will help a little, better than nothing.

Frosty69 said:

Ok so that was a bad idea... the only reason i thought of this was back a few years ago i had a grow and i was bringing cool air from the cross pace basement to cool my room and at that time the furnace was also in the basement crosspace. I kind of thought it would be a bad idea but I'm glad i checked twice.

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I don't think it's a bad idea at all. Many people go out of their way to build or purchase CO2 systems for tents. You don't have to use all of the exhaust gas, but you could hook up a regulator or just turn on/off the valve that feeds the gas to the plants. Just make sure when you go in there, you may be breathing it to. That excellent idea of yours should be considered by tent growers. Thanks for sharing! Peace

bird dog said:

I don't think it's a bad idea at all. Many people go out of their way to build or purchase CO2 systems for tents. You don't have to use all of the exhaust gas, but you could hook up a regulator or just turn on/off the valve that feeds the gas to the plants. Just make sure when you go in there, you may be breathing it to. That excellent idea of yours should be considered by tent growers. Thanks for sharing! Peace

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some people need to learn the difference between C02 and C0.
idiot!!!!!

chuck estevez said:

some people need to learn the difference between C02 and C0.
idiot!!!!!

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Sorry...my dumbness I guess. It's still not very nice to call me an idiot...especially since I was trying to help the thread and give a nice compliment! Instead, I just get insulted! So, Mr. Einstein, tell me and the other responders before me here that apparently not know the difference? I'll say peace again, instead of idiot.

bird dog said:

I don't think it's a bad idea at all. Many people go out of their way to build or purchase CO2 systems for tents. You don't have to use all of the exhaust gas, but you could hook up a regulator or just turn on/off the valve that feeds the gas to the plants. Just make sure when you go in there, you may be breathing it to. That excellent idea of yours should be considered by tent growers. Thanks for sharing! Peace

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Are you insane? Carbon Monoxide will kill a household (humans too) swiftly. We'll put this in the "let's not and say we did" category. As Chuck mentioned, there is a major difference between CO and CO2. OP was discussing CO, not CO2.

Figong said:

Are you insane? Carbon Monoxide will kill a household (humans too) swiftly. We'll put this in the "let's not and say we did" category. As Chuck mentioned, there is a major difference between CO and CO2. OP was discussing CO, not CO2.

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You are right, CO2 or similar exhaust will kill any breathing animal. I was assuming that the tent(s) being used are not in the basement. Mine and all of the grower friends I know have them in an exterior building. I still don't see the difference in the gases? What engine generates CO gas and what is it?

Crash course:

CO = carbon monoxide.. fucking deadly to animals, humans, and other things
CO2 = plants love, helps photosynthesis, plant production, and canopy properties

Any engine that runs on diesel / gasoline is capable of it.. is why it's also a massive threat when you're filling scuba tanks on boats - if air intake is downwind... CO compressed = even more deadly than you would otherwise expect, in terms of ppm - of which it doesn't take a ton of CO to cause vomiting / lightheaded/blood vomiting

Figong said:

Any engine that runs on diesel / gasoline is capable of it.. is why it's also a massive threat when you're filling scuba tanks on boats - if air intake is downwind... CO compressed = even more deadly than you would otherwise expect, in terms of ppm - of which it doesn't take a ton of CO to cause vomiting / lightheaded/blood vomiting

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Both were good explanations and thanks. Not sure how I aced Chemistry in high school 38 years ago (lol).

So,
what do we exhale?
Lot's of growers here (not me - lol) are using CO2 then?

We exhale Carbon Dioxide (CO2) .. just not in the concentrations required to help a grow room. Quite a few run CO2, and there's an awesome tankless hot water heater setup that produces CO2, fully detailed in these very forums.

Carbon dioxide (chemical formulaCO2) is a naturally-occurring chemical compound composed of 2 oxygenatoms each covalentlydouble bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state, as a trace gas at a concentration of 0.04 per cent (400 ppm) by volume, as of 2014.[1]


Carbon monoxide is produced from the partial oxidation of carbon-containing compounds; it forms when there is not enough oxygen to produce carbon dioxide (CO2), such as when operating a stove or an internal combustion engine in an enclosed space. In the presence of oxygen, including atmospheric concentrations, carbon monoxide burns with a blue flame, producing carbon dioxide.

bird dog said:

Sorry...my dumbness I guess. It's still not very nice to call me an idiot...especially since I was trying to help the thread and give a nice compliment! Instead, I just get insulted! So, Mr. Einstein, tell me and the other responders before me here that apparently not know the difference? I'll say peace again, instead of idiot.

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Based on the advice you gave, I think that it was perfectly reasonable for chuck to reply as he did.

bird dog said:

Sorry...my dumbness I guess. It's still not very nice to call me an idiot...especially since I was trying to help the thread and give a nice compliment! Instead, I just get insulted! So, Mr. Einstein, tell me and the other responders before me here that apparently not know the difference? I'll say peace again, instead of idiot.

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yeah, sorry for calling you an idiot, but as you can see,your advise was about as idiotic as it gets.

I re-read the initial post here and realized that I did not address the question properly. Again...my bad! I was basing my response on the title, which suggested furnace exhaust. I still don't see why some people have to pick on someone that they do not know. It's one thing to clear up a mistake, such as mine, but it's going overboard to start picking when someone is TRYING to help. I'm out of here. Peace