Commercial – Water Heaters

 Bradford-White-water-heaters

Works Plumbing installs Bradford White Water Heaters. Quality and dependability of your water heater is a priority. That is why we choose Bradford White.

On April 16, 2015, there was significant changes to water heater energy factor (EF) requirements as the result of updates to the National Appliance Energy Conservation Act (NAECA). These new requirements call for higher energy factor (EF) ratings on virtually all residential gas, electric, and oil water heaters, completely altering the water heater landscape. NAECA also affects some light-duty commercial water heaters.

The NAECA rulings are important to customers because they reduce energy usage and save money all year long. According to the U.S. Department of Energy website, standards mandatory in 2015 will save approximately 3.3 quads of energy and result in approximately $63 billion in energy bill savings for products shipped from 2015-2044.

Bradford White is NAECA ready, and we’re committed to helping you get ready too!

HOW THE ENERGY FACTOR (EF) IS CALCULATED

The energy factor (EF) indicates a water heater’s overall energy efficiency based on the amount of hot water produced per unit of fuel consumed over a typical day. The higher the EF, the more energy efficient the water heater. The EF is measured in three ways: 1. Recovery efficiency – how efficiently the heat from the energy source is transferred to the water. 2. Standby losses – the percentage of heat loss per hour from the stored water compared to the heat content of the water (water heaters with storage tanks). 3. Cycling losses – the loss of heat as the water circulates through a water heater tank, and/or inlet and outlet pipes.

NAECA AND GAS WATER HEATER PRODUCTS

bradford-white-products-gasGas water heaters will require additional insulation, incorporate newer flue baffling technologies (including flue dampers), incorporate electronic ignition in lieu of the standing pilot, or any combination of these. One impact will be an increase in the overall product size, especially in diameter. For gas-fired products over 55 gallons (≤75,000 BTU/Hr.), fully condensing combustion technology will most likely be required. This will also mean that line voltage will have to be available as will a means for condensate disposal.

NAECA EF Requirements for Residential Water Heaters
20-55 GallonsGreater than 55 Gallons
CalculationEF = 0.675 – (0.0015 x V)EF = 0.8012 – (0.00078 x V)
Rated Storage Volume
Tankless
30
40
50
60
65
75
Current Standard
0.62
0.61
0.59
0.58
0.56
0.55
0.53
2015 Standard
0.82
0.63
0.62
0.60
0.75
0.75
0.74

NAECA AND ELECTRIC WATER HEATER PRODUCTS

bradford-white-products-electricElectric water heaters will require more insulation. This will increase the diameter and/or height of the water heater. Additional insulation may be required for piping and fittings such as drain and T&P valves. Electric water heaters over 55 gallons (≤12 kW input) will likely utilize integrated heat pumps to meet the new EF requirements, based on currently available technology.

NAECA EF Requirements for Residential Water Heaters
20-55 GallonsGreater than 55 Gallons
CalculationEF = 0.960 – (0.0003 x V)EF = 2.057 – (0.00113 x V)
Rated Storage Volume
20
30
40
50
65
80
120
Current Standard
0.94
0.93
0.92
0.90
0.88
0.86
0.81
2015 Standard
0.95
0.95
0.95
0.95
1.98
1.97
1.92