One Homeowners Geothermal Story (WaterFurnace 7-Series)

Making the significant investment in installing a geothermal heat pump does make sense. Keep in mind, a geothermal heat pump also becomes the most efficient central air-conditioning system during summer and provides free water heating.

I just replaced my old heat pump with a WaterFurnace 7-Series geothermal heat pump in my home. Even though the overall installed cost is higher than other systems, it will pay back its cost in savings — and the comfort level is excellent. Also, if one is installed by 2016, there is a 30 percent federal tax credit on the total cost.

I chose this W700b11_Slider1aterFurnace model because of its super high heating and cooling efficiencies. It has a heating efficiency COP (coefficient of performance) of 5.3. Using the constant temperature underground, it produces more than $5 worth of heat for each $1 on my utility bill.

For most homes, several 5-inch diameter holes are drilled about 150 feet deep for the tubing to use the Earth’s heat. This is called a vertical loop. I have a large backyard, so I installed a long horizontal 5-foot-deep loop. The loop replaces the outdoor condenser unit, so there is no noise to bother you or neighbors. The indoor compressor is very quiet.

The 7-Series model, because it uses a special variable-output compressor, fine tunes the heating and cooling output to the instantaneous needs of the house. This is the most expensive system design, but it provides the best savings and year-round comfort. The installation cost of the ground loop is the same no matter what geothermal system you install.

By constantly varying the output, it runs in more efficient slower, quieter cycles, and the air from the register feels hot. A common complaint for standard heat pumps is that the house never feels warm. The energy-guzzling backup resistance heating seldom, if ever, comes on.

During very hot weather, the compressor can run in supercooling mode to produce an extra 20 percent output.

The next step down in comfort and efficiency is a model with a two-stage compressor. Most of the time, it runs at the lower-output speed. When it cannot heat or cool your house to the thermostat setting, it automatically switches to the higher speed for more output. Its EER is as high as 30.

The simplest design is a single-output compressor that either is on or off. This still provides much better comfort and savings over a standard heat pump.

Give us a call at Ground Loop Heating and Air Conditioning today and talk to one of our knowledgeable sales associates about the WaterFurnace 7-Series and having Geothermal installed in your home.

This entry was posted on Sunday, August 10th, 2014 at 6:14 pm. Both comments and pings are currently closed.

One Response to “ One Homeowners Geothermal Story (WaterFurnace 7-Series) ”

  1. Thomas Owens says:

    I’m looking at replacing a 14 year old FHP 5 Ton Geothermal Split System with a WF 5 Ton Split System 2 stage compressor with a Variable Speed Air Handler. I have a “Pump and Dump” system that produces ample water for the flow.
    Does anyone have a ballpark guess how much this type of system would cost for installation?

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