Ron, I did some research years ago on heating my woodshop with electricity to help keep the humidity down. You can only get up to aprox 5020 btu's out of a 1500 watt heater period. These high priced heaters will not produce any more heat than a 35.00 cube type heater. The thing to look for is one that has a good thermostat. Some heaters even when not producing heat will use electricity.I have a oil heater and several others I've used in travel trailers over the years and recently purchased a Pelonis brand for 30.00 and it worked great for my fish room which is aprox 28x32. I have a watt meter which will tell how much wattage used and if left connected for a few weeks will give a yearly cost. I kept the room at 78-80 degrees with this heater consistantly but I can't say how much it saved me because I didn't have anything to base it on. I do know that it is cheaper to heat the room than heat numerous tanks. The electric heat will dry the air some which may help keep the humidity down. All this said I switched to a fluless natural gas heater half way into the winter which I know is much cheaper but it does add humidity. I have to run a dehumidifier anyway with 20 tanks running so its a wash. As you can see there are many varibles and lots of choices and other thoughts as in heat rises etc etc etc.
