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Featured Products |
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Fantech Kits |
 These handy kits include fans, mounting brackets, Y adapters, collars, clamps, and lights. See individual kits for contents. Great quality and value! |
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AirScape Fans |
 Reduce indoor air temperature by pushing the hot air out of the house through the attic and replace it with cooler outside air. Quiet and reliable. |
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How To's: Our Do-It-Yourself Help Section
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Metlund - Save Money, Water, and Energy!
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With the costs of energy (and water) skyrocketing we wanted to highlight a very impressive product that can help you mitigate some of those increased costs: The Metlund® D'MAND® SYSTEM.
How does the Metlund system work?
The Metlund® D'MAND® SYSTEM is an electric water pumping system that quickly (typically within 30 seconds) brings hot water to
the fixture by pulling water from the hot water tank and returning ambient house temperature water back to the hot water tank or tankless heater. The D'MAND® system is usually installed under the sink farthest from the water heater.
When activated, it circulates the ambient house temperature water normally discarded down the drain, back to the water heater through the cold water line. At the same time, the D'MAND® system pumps hot water rapidly from the hot
water heater to the fixture. When hot water is detected in the line the pump stops automatically and hot water is available at the faucet.
In typical residential applications it costs less than $1.00 per year to operate the pump. It can be activated by any combination of methods such as buttons, wireless remote control, or motion sensors. Life expectancy is 15 to 20 years and servicing is not required.
Tankless?
The Metlund® D'MAND® SYSTEMS (S-70 and S-02) are the only pumps on the market approved for use with tankless water heaters. Smaller pumps available from other manufacturers do not have enough volume or pressure capability to activate most tankless water heaters.
Why use it?
- Saves energy and water: The loss of water while waiting could be 3 to 7 gallons. Since most homeowners do not stand and wait for hot water to arrive, another 1 to 3 gallons may be lost before they notice hot water has arrived.
- Easily installed in new or existing homes.
- Will work with any water heating system.
- Installed within two hours or less on any existing or new home. Does not require major plumbing.
- Return on investment: Will have a payback of one to three years.
- Extends water heater life.
- Reduces sewage and air pollution.
How much water is saved?
Water savings for a household of four occupants varies from about 900 gallons to about 3000 gallons per point of use, per year (DOE study). Point of use is a single location at a home, for example a faucet where hot water is available. The water savings in a home with four points of use, on the average, would be 3,600 to 12,000 gallons per year.
If a home saved only 20 gallons of water each day (7,300 gallons per year) then in one year the impacts would be:
- $151 Saved (including natural gas for water heating, water, and sewer - @ $1 per therm) or
- $175 Saved (including propane for water heating, water, and sewer - @ $1 per gallon) or
- $242 Saved (including electricity for water heating, water, and sewer - @ $0.1 per kWh)
Selecting the right pump:
- The S-50 models are designed for smaller homes where the distance is less than 50 feet from the water heater. NOT recommended for tankless hot water heaters. Typical wait for hot water before installing pump: less than 1 minute.
- The S-70T models are designed to effectively deliver hot water rapidly up to 100 feet from the water heater. They are designed for most residential homes. Typical wait for hot water before installing pump: 1 to 3 minutes.
- The S-02 models will accommodate larger homes and commercial applications where distance from the water heater and larger diameter piping are factors. Typical wait for hot water before installing pump: 3 or more minutes.
Plumbing layouts:
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1. Standard retrofit plumbing: The majority of homes are plumbed in this manner. Depending on where the fixtures are located, the hot water line runs as a main line then branches to the fixtures. In most cases, the branches are short and the main hot water line is long.
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2. Structured Plumbing® 1: Locate the S-Series pump and the ThermoSensor at the fixture furthest from the water heater. A button hardwired directly to the pumb is used to activate the system at that fixture. Wireless remote buttons are used to activate the system from other fixtures.
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3. Structured Plumbing® 2: Locate the S-Series pump at the water heater and extend the ThermoSensor from the electronic control board back to the fixture furthest from the water heater. Both the S-Series pump and the ThermoSensor should be installed on the dedicated return line pipe.
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Images courtesy of ACT Metlund.
More Links:
- All Metlund Pumps
- Our Gas Water Heaters
As always, if you would like to ask more questions about this or other technical topics give us a call at 877-711-4822 - 9-5 PST.
Live people for technical and sales support - an Internet first!
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