Click on to my picture of my toy box. It's 105x48x14. It's got 24" of insulation up there and I have radiant heat in the floor. I set the thermostat at 54 degrees. That keeps the floor at 72 degrees. I don't winterzie my boat. Checked the drives before I left and they were showing around 65 degrees. My kids just send the January bill down. Mine you now it was extermely cool in January in Northern Ky with all the snow and low temps. The bill was right at $300. Pm me if you need help.