Hayward 400k Natural Gas IID Low NOx Universal H-Series Heater (H400FDP)
The Hayward Universal H-Series Low NOx 400,000 BTU Natural Gas Pool and Spa Heater is an eco-friendly heater built for energy savings and reliability. It is designed with corrosion-resistant Cupro Nic...
Pros: It kept the pool very warm for the 6 months it worked
Cons: Are you kidding? I did not last two year! and no warranty