Will exhausting my hot air down the central air vent fuck something up?

yes/no ?

It depends. If you put it straight into the intake duct (typically square and covered by a filter) there shouldn't be any problems. This however will cause your AC unit to run longer because of the extra heat. And if your exhaust isn't scrubbed, the smell will be distributed throughout the entire house. If you instead put your "grow exhaust" into the AC exhaust (typically a register on the floor or diffuser on the ceiling), it will just cause back pressure in the ducting and blow the "grow exhaust" into adjacent rooms.

i agree with mike, but if you can get the smell under control then it really don t matter. I dont think the "grow air" is hot enough to make your a/c run longer. so fuck somthin up ....? NO

Ducting for the heat system and central air should be the same system. If you are connected to the duct system, when the a/c or the heater come on they will push air through your exhaust and into your room. If you do tie in to your ductwork tie in to the cold air return. This is the intake for your a/c - furnace. And although there is a filter on the cold air return it is not sufficient for removing grow room odors.

Tyrannabudz said:

Ducting for the heat system and central air should be the same system. If you are connected to the duct system, when the a/c or the heater come on they will push air through your exhaust and into your room. If you do tie in to your ductwork tie in to the cold air return. This is the intake for your a/c - furnace. And although there is a filter on the cold air return it is not sufficient for removing grow room odors.

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Heh, well I'll be carbon filtering it down my vents, gotto keep a low heat sig, an i figure i can save money/energy on heating if i pump hot air to the rest of the house this winter. the plants will keep me warm

I forget one detail about central air units. Newer ones typically monitor the pressure difference between exhaust and intake. This is how the system detects whether or not you should replace your filter. Aside from the notification, there shouldn't be any problems.

what about blowing air into the heater? will it blow out the pilot light?

ReAVeR said:

what about blowing air into the heater? will it blow out the pilot light?

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You have to make sure u run your vent to the OUTAKE of the furnace (what goes out the chimney) if your gonna use the existing ductwork then use a Y instead of a T to tie into the duct.
(u dont want ur grow air going into the furnace or it will spread it throughout the house bigtime.)