Worse yet in residential hvac systems, you have a closed system. When the furnace kicks on, it pulls inside air to heat it up. That air displacement creates a a negative air pressure inside the home. The exaust plumbing is typically nothing more than pvc pipes that are placed right at the exterior wall of the house. This just causes all that exhaust from the furnace to just get sucked back into the home. Diluted with outside air, yes, but a significant amount of it is getting sucked back in. Now it’s winter, you are running your dryer, and frying some bacon on the stove with the exaust. Some one is in the bathroom with the exaust fan on too. All that co2 is getting pumped right back into your home and then some.

Oink oink, it looks like a piggy nose

My boss just bought me a new silverado 2500. But I also bust my ass of like your neighbors rented mule.

Lol luna pulled the gog library. I was in the middle of kcd2. I said fuck you. Got my self a nice gaming rig, set it up just like I had it on my TV with controller. And done. Now I’m back to normal.