My split level home (in the stove room) has a square cut out between the floor joists with a register cover on both sides. This in theory allows warm air to funnel up to the bedrooms. It is located in a mutual foyer outside all 3 bedroom doors of the upstairs. The heat does rise up from the stove room through the floor register, naturally. However i would like to try and push more air warm upstairs somehow; ideally though the floor hole/register. I know that it is better to push cold air to the stove room. However, the house tends to naturally loop pretty well. If I could get more warm air upstairs via the floor register, I would be pushing the upstairs cold air back down (as a result). I have some ideas: 1. There is electric nearby (within the floor vent) attached to a switch, downstairs. Install an attic fan/bathroom vent and draw warm air up from the stove room and blow it up through the floor vent upstairs? Or am I thinking incorrectly and I should reverse that and blow cold air from upstairs down into the stove room and allow the warm air to push up the hallway/stairs (see photos). 2. Install a small door way fan and push the could air back down the hallway/stairs (see attached photo) thus resulting in more rising heat up through the floor vent? 3. Our girls are discussing knocking out a wall between their two bedrooms. If I did this (it’s easy) I could cut another vent hole into the floor (where the wall used to be) and this would be directly above the stove room. But, no reason to do so if it’s not going to work. Please send some other ideas if you have them. Anyone have any luck with these floor vent holes? This house was set up this way when we moved in. I did not cut the hole/install the register myself. When we moved in, you could tell there was at one point in time, a wood heater of some kind that was removed prior to us moving in. I suspect the floor vent was original to the house. Circa 1979.