Using a float switch to turn a pump off
"But I wonder what the percentage is for boats that have A/C running with no one onboard?"
IN FL or the rest of the south in summer , I would assume 100% of the liveaboards that can pay for the electric.
Remember HEAT is way different from cooling.
A heater can easily pump air that is 150+ deg warmer than the cabin , so the response is rapid.
Most air cond will deliver air that is 35 deg or so , which takes way longer to effect the cabin temperature. 100F inside -35 F is only half the effect of heat.
-- Edited by FF on Thursday 20th of October 2011 04:40:57 AM