Raypak Heater Low-NOx Digital R267A ASME 267.000 BTU P/N: 009293 Outdoor top is standard P/N: 009839 Why ASME? Some local codes require that public pools, pools that are in a condominium and apartment or other commercial application be ASME certified. ASME stands for American Society of Mechanical Engineers. They are a non-profit group which sets many industrial and manufacturing standards. A pool heater that is made to ASME standards will perform to a set of specifications as determined by ASME, specifically in relation to the operating water pressure the appliance can handle. Each and every ASME heat exchanger that goes into a Raypak heater is certified by a state inspector to make sure it complies with the ASME code for that particular product. ASME Code Heat Exchanger Cast Iron Glass-lined Header Raypak applies its years of commercial boiler experience to the design of its cast iron glass-lined headers. A metal header design allows for the higher working pressures required by ASME. All ASME headers are inspected upon arrival at Raypak and each lot (pour date) tested by an independent laboratory. Only after the material passes stress analysis and metal composition tests is it approved for use in an ASME unit. All Copper Fin Tube Heat Exchanger All Raypak RP2100 ASME gas heaters come standard with .065" wall integral copper finned tubes. This tubing is over 50% thicker in wall thickness than standard tubing. Since the fins are integral to the tube, maximum heat transfer is attained. The fin tubing is made from one piece of extruded copper tube, not from separate fins attached to the copper tubes. Every RP2100 has the same robust design tube bundle that is used in Raypak's large gas commercial boilers. Built to last, built Raypak tough. CPVC 2" Water Connections Standard with every RP2100 is a set of 2" slip fit CPVC water connections to make your installation secure and effortless. These couplings screw into the 2" flanged header. You can also direct plumb your copper pipe into the flanged header. Condensation Protection Standard on all RP2100 models is Raypak's Unitherm Governor, which is like an automatic bypass. The Unitherm Governor automatically regulates the water flow to help keep the water temperature in the heat exchanger above 105 F. Hi Flow Rates No need to worry about large pumps or high flow systems. The RP2100 comes with an automatic bypass built into the header. The RP2100 can handle up to 125 GPM.