WW Series - Water source heat pump water heaters

E-Tech WW Series high efficiency water heaters are water-source heat pumps specifically designed to heat water. They use environmentally friendly R-134a refrigerant and provide final tank temperatures up to 140°F, efficiently heating water by recovering waste heat from a variety of sources.

E-Tech WW Series heat pumps use existing resources - the building chiller or cooling tower, a lake, a well or a ground water loop - as the source of energy for heating water. The heat pump moves energy from this source to the water to be heated. Instead of continually consuming gas or electricity to heat water, you only pay for the electricity it take to move the energy - typically 50-75% less than direct heating.

E-Tech commercial water heaters are an energy saving investment for commercial and industrial applications with large hot water requirements. They provide three important benefits:

• They reduce the energy cost to heat water
• They can reduce the energy costs of space cooling
• They are environmentally friendly.

Hot Water Costs $$$:

E-Tech high efficiency heat pump water heaters can save 50-80% of your hot water energy cost. Applications with high utility costs and large hot water requirements save the most, and your geographic area and local energy costs play an important role in how much you can save.

How much can I save?

Most experts expect energy prices to continue to rise. As energy costs go up, the amount of money you save will continue to increase, making today's investment in high efficiency water heating a wise financial decision.

Even better…Free Hot Water!

Extracting heat from the water source, the WW series can reduce the load on building chillers and recover heat that would otherwise have been wasted to the atmosphere. When used to recover heat from a building chiller loop (commonly used in large buildings and hotels) the cost of operating the heat pump is generally offset by the reduced load on the chiller. This results in essentially "free" hot water while the chiller is operating.

Environmentally Responsible - "Green" technology

E-Tech high efficiency water heaters are environmentally friendly in several ways;

• They reduce the purchased energy demand for hot water production by 50-80 % by using energy already available in the room.
• They can replace fossil fuel water heaters, eliminating their greenhouse gas emissions.
• They use environmentally friendly, non-ozone depleting refrigerants.

E-Tech high efficiency water heaters can be an important component in new green building designs.

Storage Tank Requirements

The WW series integrates into a new or existing storage tank. Proper sizing of the storage tank is an important part of an effective heat pump water heating system. Contact us for help in sizing your storage tank or download the storage tank sizing worksheet.

Selecting the E-Tech WW Water-to-Water Heat Pump Water Heating System

E-Tech systems are engineered to meet the needs of your application. Involve AERS in the project as early as possible so we can evaluate the water source and make recommendations for the proper WW unit for your application - whether new construction or retrofit we can save you time in system selection.

How the WW heat pump works

Standard water heaters heat water by converting a fuel source (typically electricity or natural gas) to heat, which is then transferred the water. This requires the purchase of all of the energy it takes to heat the water. Since no standard water heater is 100% efficient, you actually need to pay for more energy than the water heating requires to make up for the inefficiency.

E-Tech heat pump water heaters work by transferring heat, not creating heat. Heat pumps move energy from someplace it's not needed (in this case, a water source) into the water. The total energy required to heat the water does not change, but you only need to purchase the energy which is needed to move the heat - typically only 25 - 50% of the total energy - saving you up to 75% of energy costs.

The WW series water-to-refrigerant coil extracts heat from an available input source, transfers the heat to the output water via a refrigerant-to-water coil which produces hot water. A water source heat pump water heater operates very efficiently as the heat generated by the compressor motor and the refrigeration compression cycle is also converted to water heating.

Want to know more about heat pump water heaters work?

What are some good applications?

Applications that have simultaneous space cooling and domestic water heating requirements are the best candidates for a water source heat pump. Some typical examples are:

• Hotel laundries and kitchens
• Food processing
• Hospital or nursing homes laundries and kitchens
• Textile manufacturing
• Metal fabrication manufacturing
• Industrial processing using hot water
• Even green houses where water can be extracted from a well or ground loop

What models are available?

Standard WH Series machines are available in capacities from 54,000 to 675,000 at rated conditions. Custom products are available in capacities up to 2,000,000 Btuh.

Two special system packages are available:

• A Pool Heating Option for Indoor/Outdoor Pools (P)
• A Reverse Cycle Option for the ability to Heat or Cool the water is desired (R)

Model	Heating Capacity (Btuh)	Cooling Capacity (Btuh)	COP	Final Water Temp (°F)
WW-54 HT	54,000	39,000	3.7	140
WW-96 HT	96,000	69,000	3.6	140
WW-110 HT	110,000	80,000	3.7	140
WW-165 HT	165,000	125,000	3.5	140
WW-190 HT	190,000	138,000	3.5	140
WW-330 HT	330,000	250,000	3.7	140
WW-430 HT	380,000			140
WW-500 HT	500,000			140
WW-720 HT	675,000			140