EA New Homes Measures Guide - Earth Advantage

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2012 Earth Advantage Residential Measures Resource Guide 8.1.4 Energy Health Land Materials Water Efficient Kitchen Faucets: 1.5 gpm or less or Water Sense label 1 0 0 0 1 Description: Install kitchen faucet with aerators which limit flow to 1.5 gallons per minute or use Water Sense labeled products. Benefit: Efficient faucets reduce water use. Verification: EA Rater will read flow rates stamped on faucet aerators or measure the flow rate directly. Water Sense labeled products can be identified on the EPA website. 8.1.5 Refrigerator: Through the door water and ice unit Description: Install a refrigerator with water and ice delivered through the door. Energy Health Land Materials Water 0 0 0 0 1 Benefit: A refrigerator with cold water supplied through the door uses less water when compared to running a water faucet until the water cools for drinking. Verification: EA Rater will confirm the presence of a refrigerator with water and ice in the door. 8.1.6 High-Efficient Toilets: WaterSense qualified toilet, 1.28 gpf (WaterSense) Energy Materials Water 0 0 0 0 3 Description: Install a Water Sense qualified toilet (1.28 gpf). Dual flush toilets also meet the requirement. Dual flush toilets use two flush modes. The first mode uses the full 1.6 gallons per flush for flushing solid waste. The second mode uses fewer gallons per flush (usually 0.6 - 1.1 gallon) for flushing liquid waste. Another method of achieving lower flush volumes is a pressure assist model. All dual-flush toilets in the home must meet this requirement to achieve measure points. Calculate the average flush volume using this formula. Dual Flush Average Flush = [(full flush) + 2(half flush)]/3. Health Land Benefit: Toilets consume more clean water than any other indoor plumbing fixture, accounting for about 30 percent of indoor water use. Verification: EA Rater will read flow rates stamped on the toilet and verify that all toilets meet this spec. Water Sense labeled products can be identified on the EPA website. Page 56 of 70
2012 Earth Advantage Residential Measures Resource Guide 8.1.7 Whole-House On-Demand Hot Water Delivery System Energy Materials Water 1 0 0 0 3 Description: A small pumping system delivers hot water to the faucet quickly. A manual switch must be installed to activate the pump. The unit must be installed per manufacturer instructions. The point is not available if the unit triggers on a motion sensor. This is not a typical hot water recirculation system in which a pump runs constantly to keep hot water immediately available to all fixtures. (Some systems include timers to limit operation to the times of day when hot water is typically used, but this generally means the pump still runs for many hours a day.) Water circulating in the pipes loses heat and drives up the stand-by loss of the water heater. Also, a small amount of electricity is used to operate the pump. Health Land Benefit: On-demand hot water delivery systems save water by delivering hot water to the fixture quickly. Without this system the occupant will need to open the hot water tap and wait for the hot water to reach the fixture. This will allow the occupant to run the pump only when hot water is needed. Homes with a centrally-located water heater may not benefit as much from the installation because of short plumbing runs. Verification: EA Rater will test the system to ensure proper operation. An on/off button will be located at the faucet furthest away from the water heater. 8.1.8 Energy Health Land Materials Water Short Hot Water Piping Runs: 20 feet one story - 10 feet for each additional 1 0 0 1 2 floor Description: Plan plumbing runs to minimize the length of all hot water lines. Place water heater in a central location to reduce the length of hot water lines to fixtures. To qualify for this measure pipe runs need to be limited to no more than 20 feet for single story homes plus no more than 10 feet for each additional story. The key to efficient hot water distribution is to design the home's floor plan so that the kitchen, laundry, and bathrooms are near a centrally-located water heater. Benefit: It is typical to run the faucet while waiting for the water to warm up. In addition to being wasteful of water, such an approach also wastes energy if the faucet is particularly far from the hot water source. Water sits in the pipes and cools, so that it must be flushed out again the next time. All the hot water that went down the drain is also replaced by cold water in the water heater, and it takes energy to heat it back up again. This has the added advantage of requiring less plumbing labor and materials to install. Verification: At rough inspection, EA Rater will measure the distance from each fixture to the water heater. Page 57 of 70
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EA New Homes Measures Guide - Earth Advantage

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