For general information: The reverse cycle heater-A/C on my 356 works beautifully, but it is noisy. So I bought two ceramic 1500/800 watt heaters with thermostat at Home Depot for $30 each, and they keep the cabin lovely and warm. I plug them into the dock power when at dock, and since I have a generator they work as well when hanging on the hook. For those with a generator it is also a good way to keep the minimum required load on the generator to keep it from glazing the cylinders.