Our Mud room acts as a laundry room, entrance from the yard and garage, and also where the backyard door has a dog door. I would like to keep the room cool since it's not used much, plus with the dog door, there is a draft, I need to replace the crappy old door, and get a nicer dog door (3 flap cold weather) but budget wise I have more key things to do. Even with that loss of heat, the room I would like to stay as cool as I can, but there is a Electric Tank water heater, it's about 8 years old (replaced within the next year or tow) with a new thermal radiant blanket on it. How cool can I keep the room, and on a guess how much do you think the room temp will be on the tank. The room has Electric BaseBoard Heat, I am trying to figure out how cool I can keep the room, vs the electric the tank will use vs the heat in the room and the electric used there. Do you think 50 degrees is too cold and the water tank would work too hard, or do you think the electric used on the baseboard to keep it at 60-65 is worse and what we are doing now. I plan on replacing the baseboard with a Cadet Fan unit, this way we can heat the room fast when doing laundry. I also recycle the heat from the dryer back into the room during this time, so that helps.