| Standard Input - gas consumption ranges from 15,000 BTUh to 120,000 BTUh | Capacity range - flow rates from 0.5 gpm up to 6.6 gpm | Compacy Design - ANSI Z21.10.3/CSA 4.3 certified design that can be wall-mounted indoors or outdoors | Durable Steel Casing with Polyester Coating | Venting Options - available as an Outdoor (requires no venting) or indoor Direct Vent (-DV) model which includes special plastic flue adapters that are compatible with both 3” Schedule 40 and 80 PVC/CPVC pipe. The DV model can also be converted to a non-direct vent (SV) model with the use of a Conversion Kit (#SV-CK-3) | Direct Electronic Ignition | Energy Factor - 0.91 (NG) 0.93 (LP) | Thermal Efficiency - fully condensing, 93% efficient for use with natural gas or propane | Temperature Controls - includes built in display that can preset the output temperature to either 120°F, 135°F, or 140°F | Power Cord Installation Kit - 6’ power cord is included with -DV models only | Safety Devices - Flame Sensor, Overheat Prevention Device , Lightning Protection Device, Freeze Protection, Condensate Overfill, Fan Rotation Detector | Additional Features - Temperature Lockout, High Elevation Adjustment | 12-Year* Limited Heat Exchanger Warranty for Residential Use | 5-Year Limited Parts Warranty | Approvals - CSA, UPC**, NSF, Low NOx Approved by SCAQMD [<14ng/J or 20ppm]