Just run your furnace fan and cut a big hole in your cold-air return line so it draws air from the basement. This is what we do and very-rarely need to run the A/C compressor.
First summer we moved in we had Hydro bills in excess of $300/mo in the summer and now they are $125/mo
Then in the winter, we cover the hole so it draws air from the second level again.
Works great, keeps the basement smelling great because the air is moving and it keeps the upstairs cool without running the 50amp compressor!
PM me and I will post pictures if you want!
First summer we moved in we had Hydro bills in excess of $300/mo in the summer and now they are $125/mo
Then in the winter, we cover the hole so it draws air from the second level again.
Works great, keeps the basement smelling great because the air is moving and it keeps the upstairs cool without running the 50amp compressor!
PM me and I will post pictures if you want!