Other heat-pump water heaters will be coming along soon.D. After selling a few hundred units in late 2007, the company began sourcing the product from an offshore supplier.5 gallons (160 l), a maximum water temperature of 135F Electric Bicycle motors (57C), an efficiency of 240% (coefficient of performance of 2.4), and an energy factor of 2. The economic savings potential is so much greater than before, with the run-up of energy prices, Sachs told EBN. Of 400 units scheduled to arrive in June, almost all were pre-sold by the end of May, according to Sunil Sinha, chief scientist at AirGenerate.
 

With todays high energy prices, however, consumers should be more receptive to heat-pump water heaters, according to Harvey Sachs, Ph. The model will sell for about $400 more than a standard, 50-gallon (190-l) electric water heater but save an average family $250 per year

with electricity(from: http://www. The list price is $499. If the heat-pump module stops working for some reason, the conventional electric-resistance element will still keep the water warm, but homeowners will notice the problem and contact Skyland Falls. According to Alexander, one of his employees can install three AirTap units in a day.

 

Skyland Falls, a Tennessee developer, has installed 30 AirTap units since January 2008 in a 70-unit subdivision currently under construction. [AirTap] may be able to ride the wake instead of having to break through the ocean waves, he said.

 
This model will offer the same energy factor of 2. Houses in the subdivision are 2,000 ft2 (190 m2) each and sell for an average of $230,000. The AirTap A7 water heater has a rated output of 7,000 Btu/hour (7. (Energy factor is a standardized measure of performance of water heaters; the higher the number, the better.building-materials-china., the buildings program director at the American Council for an Energy-Efficient Economy.11 but will have a first-hour rating of 60 gallons (230 l). Having major manufacturers enter the heat-pump water-heater market, according to Sachs, will give this sort of product legitimacy.building-materials-china. In late spring 2008, the all-electric homes were using less than $2 per day for energy, according to Alexander, though how much of this is for water heating is not known.com/) will go out and troubleshoot the problembut it probably wont be an emergency call, since the water will remain at least warm.com/buy-electricity/) at 10 cents per kWh, the company claims. The outsourcing of production will allow the company to significantly ramp up production. Since this is a new system, we wanted a backup, Alexander told EBN.building-materials-china.com/) in a 100-unit subdivision that is in the works.

The first of the new (offshore-manufactured) AirTap units were received in January 2008, and about 200 had been sold through May 2008. Skyland Falls installs the water heaters in utility closets with the outflow air from the AirTap heat pump vented into the adjacent garage; this setup provides some cooling to the garage, which is beneficial in the summer. The controls on the water heater are set so that the standard element will come on at 100F (38C), while the AirTap is set to heat water to 130F (54C).

The energy factor and first-hour rating of the AirTap are certified by GAMA (previously the Gas Appliance Manufacturers Association and now a broader association of appliance and equipment manufacturers). With some units in place for four months, Skyland Falls has yet to receive a call. General Electric expects to introduce its Hybrid Electric Water Heater in late 2009.An Affordable Heat-Pump Water-Heater Retrofit
The engineers at AirGenerate (previously Beyond Pollution) appear to have done something remarkable: create an affordable, effective, heat-pump water heater that can be retrofit onto a conventional gas or electric water heater, more than doubling the energy performance compared with a standard electric water heater.building-materials-china.) All this is in a unit that measures only 18" wide by 14" deep by 14" high (460 x 360 x 360 mm), weighs only 48 pounds (22 kg), and sits on top of a standard water heater.building-materials-china. According to Sachs, a second major player is likely to soon announce another heat-pump water heater.