Hi,
Replace the return air grill on the cabinet where the furnace is housed with a dual window fan. Add a thermostat to control it. That way the electric heat will look after the tanks and lines.
Chuck&Gail wrote:
On our TT the fresh water tank, both waste tanks, and waste valves are heated by FURNACE. So if it might get below freezing we use only the furnace. Risking frozen tanks and lines is not worth the gamble of using an electric heater for us.
If we are sure it will not freeze outside, we use an electric heater.
