I have a similiar setup. A floor vent above the stove is worth it, but not to blow the air down from above but hook your blower from the stove to some stack and force it up. see this link Modified Stove with Ducting
. The cold air comes down the stairs which are about the same distance away as yours. I've done a lot of testing with this (you could look for my posts and diagrams). When I just let the air rise up I was only getting mid 80's air temp going up which will do nothing to increase the upstairs temps. Once I hooked the pipe to the stove and forced the hot air upstairs, I was getting 125* at the floor vent which dramatically made a difference in the above floor's air temps. My basement and 1st floor use to be as yours is a 11 - 12* difference. Now it's around 3*.
Here is a layout of my house. Heat Circulation with Diagram
I've add return vents from the back two bedrooms this year, so I'm hoping for even more improvement in temps.
PS. if you can't see the whole image of floor plan, just save the image to your desktop and you can then display it in full.
I'm always looking to improve the heat circulation in my home. My Alaska 3 stove is on the right side of the house - on the 1st floor. The stairwell, leading up to the 2nd floor, is on the opposite side of the house (maybe 25-35ft away). I was thinking of cutting a hole in the ceiling above the stove and installing a power vent. I would have the fan of the vent blowing down into the stove room to try to pull the cold air from the upstairs to create more circulation between the upstairs and downstairs. Do you guys think it's worth it? The stove room on a typical day is about 78 while the upstairs is around 69. . When it gets really cold out the heat differential is around 11-12 degress. If I can get a more even heat I can run the stove lower at night.
I also have a cold air supply which is a metal dryer vent pipe supplying air to the stove's combustion motor. If I do what I am proposing above would it make sense to get rid of the cold air supply to create as much of a vaccum as possible in the house to help get the cold air from upstairs to downstairs?
Thanks in advance