You should consider listening to those with experience when you have none yourself.
I've ran all sizes of grow from 100-8000 watts. With a small grow like what you run its unimaginable that it will produce that much heat, but as you scale up the heat truly does add up.
Maybe you wouldnt be able to heat your house with 2000 watts... but you may be able to do it if you tried and spent a lot of time figuring it out like I have.
Maybe your place isnt as well insulted as mine, could be factors like size of the house and a dozen other factors you dont think about
Excellent air movement via wall fans, directed at my exhaust plugged directly into the home hvac allows me to harvest excess heat from the walls, and other surfaces into the air, and out of that room and into the other rooms.