Check the listing for details. Pentair MasterTemp 125 High Performance Natural Gas Heater, 15,000 Gal. Condition: New. Listed at 1759.00 USD. Pentair MasterTemp 125 High Performance Natural Gas Heater, 15,000 Gal Item Number: 924100 Item Features The MasterTemp® 125 Natural Gas Heater is for above ground and inground pools and spas up to 15,000 gallons. With a premixed gas combustion technology this heater offers 82% thermal efficiency along with the ease of use of its digital LCD display. It is compact and lightweight making installation simple along with its 1 ½ inch plumbing connection. This heater is certified for low NOx emissions and is certified for outdoor and indoor installations. Features: 82% thermal efficiency Natural Gas heater Digital LCD display 1 ½" plumbing connection Can be used for inground, above ground and spas up to 15,000 gallons Certified for low NOx emissions Lightweight at 80 lbs. ¾" gas line up to 50 ft. from source Certified for outdoor and indoor installations Benefits: High-Efficiency: The high performance heater uses pre-mixed gas combustion technology and offers 82% thermal efficiency. Ease of Use: Weighing 80 lbs. this heater is light and compact making storage and set up easy, the LCD display/controller allows for better control over the settings of the heater. Connections: The 1 ½" plumbing connection is ideal for smaller bodies of water such as above ground pools, spas and inground pools up to 15,000 gallons.Pentair MasterTemp 125 High Performance Natural Gas Heater, 15,000 Gal Item Number: 924100 Item Features The MasterTemp® 125 Natural Gas Heater is for above ground and inground pools and spas up to 15,000 gallons. With a premixed gas combustion technology this heater offers 82% thermal efficiency along with the ease of use of its digital LCD display. It is compact and lightweight making installation simple along with its 1 ½ inch plumbing connection. This heater is certified for low NOx emissions and is certified for outdoor and indoor installations. Features: 82% thermal efficiency Natural Gas heater Digital LCD display 1 ½" plumbing connection Can be used for inground, above ground and spas up to 15,000 gallons Certified for low NOx emissions Lightweight at 80 lbs. ¾" gas line up to 50 ft. from source Certified for outdoor and indoor installations Benefits: High-Efficiency: The high performance heater uses pre-mixed gas combustion technology and offers 82% thermal efficiency. Ease of Use: Weighing 80 lbs. this heater is light and compact making storage and set up easy, the LCD display/controller allows for better control over the settings of the heater. Connections: The 1 ½" plumbing connection is ideal for smaller bodies of water such as above ground pools, spas and inground pools up to 15,000 gallons.