![]() ![]() Where this standard is being applied to a building outside the U.S.Water heaters or gas pool heaters in this category or subcategory are regulated as consumer products by the USDOE as defined in 10 CFR 430.Refer to Section 7.5.3 for additional requirements for gas storage and instantaneous water heaters and gas hot-water supply boilers. ![]() Oil storage water heaters with input capacity >105,000 Btu/h and 140,000 Btu/h if the water heater either (1) has a storage volume >120 gal (2) is designed to provide outlet hot water at temperatures greater than 180☏ or (3) uses three-phase power.Gas storage water heaters with input capacity >75,000 Btu/h and 105,000 Btu/h if the water heater either (1) has a storage volume >120 gal (2) is designed to provide outlet hot water at temperatures greater than 180☏ or (3) uses three-phase power.≥300,000 Btu/h and 12 kW and 2 gal (2) is designed to provide outlet hot water at temperatures greater than 180☏ or (3) uses three-phase power. Very Small DP: UEF = 0.80 Low DP: UEF = 0.80 Medium DP: UEF = 0.80 High DP: UEF = 0.80 Technology options for improving efficiency include the use of condensing technology for gas-fired water heaters and improved insulation for tanks on all storage models.Table 7.8 Performance Requirements for Water- Heating Equipment-Minimum Efficiency Requirements Equipment Typeįor applications outside U.S., see footnote (h). The thermal efficiency levels were raised to 80%, matching the current standards for commercial gas-fired storage water heaters, and took effect in October 2015. In 2015, DOE published a final rule amending the standards for commercial oil-fired storage water heaters to reflect the efficiency levels in ASHRAE 90.1-2013. The standards include maximum standby loss requirements and minimum thermal efficiency levels. DOE adopted amended standards for commercial water heaters in 2001 based on the efficiency levels in ASHRAE 90.1-1999. The Energy Policy and Conservation Act (EPCA) requires that if the equipment efficiency levels in ASHRAE Standard 90.1 are amended, DOE must either establish amended standards for the products at the levels specified in ASHRAE 90.1 or establish more stringent standards if they would result in significant additional energy savings and are technologically feasible and economically justified. ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) 90.1 is a commercial building energy code. Those standards were equivalent to the efficiency levels in ASHRAE 90.1-1989. THE STANDARD:Ĭongress established the first national standards for commercial water heaters as part of the Energy Policy Act of 1992. Although there are electric and oil-fired commercial water heaters, gas-fired equipment accounts for most of the energy consumption of this product category. Businesses with commercial water heaters range from office buildings, which typically use very little hot water, to restaurants, which may use large volumes. Commercial water heaters include a wide range of equipment that heats potable water for purposes other than space heating. ![]()
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