The Raypak 156A Natural Gas 150K BTU Above Ground Pool Heater is the only heater in this size to use all the groundbreaking features found in larger units. With PolyTuf powder coating and polymer headers, the Raypak 156A delivers uninterrupted heating performance regardless of falling leaves, wind, airborne debris, rain, downdrafts, updrafts, sleet, snow, etc. Underneath the tough, yet beautiful finish you will find galvanized metal that offers superior rust prevention and years of durable service. The Raypak 156A Heater is the perfect choice to heat your above ground pool or spa, reliably keeping the water at a comfortable temperature to enjoy.