I have to burn gas to run the chain saw and we use electricity to run fans to blow the heat around the house.
Also, I have always felt bad about the idea of cutting down trees.
What I am finding, is that 2 gallons of gas will last an entire winter, however, my last fuel-oil fill up was 127 gallons. Without the wood heat, I would use that much fuel-oil a month and a half.
The furnace has a fan, so I use electricity with wood or fuel-oil, it makes no difference.
As for cutting down trees, nature is providing for me. Since we moved in in 2002, I have had more than enough fallen wood to cut and burn. The harder the winter, the more wood falls. It’s as if nature wants me to stay warm.