amanphoto 0 Report post Posted October 30, 2014 I'm looking to extend my season - and make the wife happy. I would like to install a heater / air conditioner in my Monterey 250cr.Background: I live in NY and our boat goes in as soon as the ice melts March 1st. and comes out at first snow. My boat is 25' cabin cruiser. It would require around a 5,000 BTU air conditioner. There is no insulation and very few and small windows in the boat. I have a 3,000 watt - 110V inverter and Large 12v bank with 420 amp hours of battery. The boat doesn't Vent well and some sort of ventilation system will be welcomed.The plan: I want to install a Reverse cycle heat / AC unit or Diesel Air Heater. We don't get many hot days where we need AC, but it would be nice. We have more cold mornings and nights.The Question:1. Which one is more energy efficient? Reverse cycle heat has a compressor and fan. Diesel has pump and fan (I will have to put in a small tank for diesel fuel).2. I know the Diesel will out perform the Reverse cycle heater on really cold days, but how much heat can I expect to get out of a Reverse Cycle heater.Your advise:Has any had experience with either one of these? Share this post Link to post Share on other sites
Rip5 0 Report post Posted October 31, 2014 Don't over think this. Get the reverse cycle unit that came as an option with your boat, and call it good. It will not run efficiently off an inverter and batteries. Shore power is recommended. It will do what you need for that size boat. Heat can be an issue in freezing temps, as the discharge can and does get frozen when exiting the boat. Share this post Link to post Share on other sites
