Vent into heating ducts?

I have a new room that measures 3ftx5ft, with a 1k air cooled light. The light is cooled by a 6 inch vortex fan. I believe the CFM on that model is like 400 and some change.

The 3x5 room is located in another room (Even thought it's not a closet, think of a closet in a larger room), and that rooms temps heat up pretty fast when receiving the exhaust from the light. This in turn causes all the air sucked into the 3x5 foot room via negative pressure, to be warmer, thus raising temps where it matters.

The main heating and cooling duct that travels the length of the building passes right by. I was thinking of exhausting into this, which would distribute the heat through the rest of the structure, and help keep temps from building up in the area of the 3x5, and also let that heat be used to help heat the building with out just wasting it.

This is what I propose exactly. The chain of the ventilation system components. Air from inside room->Carbon scrubber->light->6 inch vortex->building ductwork.

Are there any damage, or safety issues from dumping this air into the heating system duct? I don't know if it will hurt or not, but last thing I need to do is kill my furnace to get rid of some heat.

Is this a tried and true, sound practice? Or is this a half baked idea that I need to rethink?

I vented my heat into the house ducts when I first started and it worked fine. I didn't have any issues with my central air unit. It will heat up the building to no surprise. Not pleasant if it's already a hot day. I decided to vent straight up into the attic instead. I mostly did this to hide heat from IR detection. Doing this mixes the hot air with cooler attic air and disperses it out the roof of the house.

DecimateForce said:

I vented my heat into the house ducts when I first started and it worked fine. I didn't have any issues with my central air unit. It will heat up the building to no surprise. Not pleasant if it's already a hot day. I decided to vent straight up into the attic instead. I mostly did this to hide heat from IR detection. Doing this mixes the hot air with cooler attic air and disperses it out the roof of the house.

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Thanks for the info. Sadly, the attic is not an option here. Basement...

Hmmm, what about outdoor dryer vents summer, and duct winter?

My only other option would be using the plumbing venting, which I am not willing nor capable of doing safely.

Also is my 449 cfm fan up to the challenge of cooling a light, and carbon scrubbing as well? It cools the light fine now, but there is no carbon scrubber yet. The hood is barely warm to the touch after the light has been running for 18 hours. I am concerned that the carbon scrubber may slow down the air, and I want to make sure that there will still be sufficient air flow.

It would depend on the size of the scrubber. Scrubbers are rated in cfm capacities, so your fan should be equal or greater to work effectively.

Thanks for the info.

Anyone else ever use the heating ducts to exhaust before?