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A- With an air source heat pump, the outside air is often subject to very cold sub zero

temps, as well as other often very damaging elements such as snow, ice storms, falling

ice, combined with wind can cause costly repairs to these units.

Also a defrost system is required to these units, which requires additional controls, sensors, timers, snow clearing around an bellow the unit for the defrost water to run off clear of the outdoor coil. Not to mention the fan blades that are very sensitive to ice and snow build ups,

causing further costly damage. These high cost repairs are not covered by warranties.

B- A geothermal heat pump has no outdoor component in the elements, but rather in

ground piping, bellow the frost line, whether it be vertical or horizontal. No matter the

outdoor weather, your heat source is at a constant above freezing temperature,

requires no defrost controls of any kind, but simply a low energy cost pumping module

inside the home to recirculate the liquid (closed loop systems) as it absorbs the natural

heat from the earths core (vertical loops) and the heat left by the sun (down to 10 ft)

into the earth from the previous summer.

As an added benefit, the heat removed from your home in the summer while you enjoy the air conditioning feature is stored around the loop area, only to be reabsorbed to heat your home in the winter, making this system an incredibly efficient renewable energy source.

It depends on land size and type. If you are on a large lot, a horizontal closed loop is

suitable and less costly to install. But if your lot is all rock, or a dry sand type, a vertical

drilled borehole will be best. Wet, clay type ground is best as it holds lots of humidity

and energy.

An open loop system takes water from a water source, usually a well, circulates it

threw the heat pump to absorb heat from the water, then returns it to a separate well

back into the ground. The returned water is simply colder and completely

uncontaminated. The wells must be far enough apart so that the colder water cannot

short cycle into the supply well.

A closed loop system recirculates the same water threw a horizontal or vertical piping

system. This system does not rely on a well water pump, but rather a 1 or 2 pump flow

module.