Geothermal FAQ Installation:
Most units are easy to install, especially when they are replacing another forced-air system. This is known as a retrofit. Geothermal systems can be installed in areas unsuitable for fossil fuel furnaces because there is no combustion and thus no need to vent exhaust fumes. Ductwork must be installed in homes without an existing air distribution system. Geothermal systems can also be integrated with hydronic heat systems. Your dealer or installer can assess the cost of installing ductwork or plumbing.
It's not recommended. Thermal fusion of the pipe, drilling and trenching are procedures best handled by licensed professionals. Nonprofessional installations may result in less than optimum performance, which could cancel out anticipated savings
Thermal fusion and stab fittings are the only acceptable method used to connect pipe sections. Thermal fusion connections are either socket or butt fused together to form a joint stronger than the original pipe. Using barbed fittings, clamps and glued joints are unacceptable and will eventually cause the loop to leak and fail.
There are two types of antifreeze solutions that are used: propylene glycol and methyl alcohol. These heat transferring solutions are mixed with water to form a solution for your specific climate and ground conditions. Geomax’s geothermal heat transfer solution is a mixture of methyl alcohol and water.
Trenches are spaced four to five feet apart while boreholes are spaced ten to fifteen feet apart.
This depends on soil conditions, length and depth of pipe, and equipment required. A typical installation can be completed in one or two days.
With the vertical installation, time varies with conditions on the site such as type and depth of the overburden, type and hardness of the bedrock, and the presence of aquifers. Typical drilling times are one or two days; total installation can usually be accomplished in two days.
Horizontal installations are simpler, requiring lower-cost equipment. However, they require longer lengths of pipe due to seasonal variations in soil temperature and moisture content. Since a horizontal heat exchanger is laid out in trenches, a larger area is usually required than for a vertical system. Where land is limited, vertical installations or a compact slinkly-like coil horizontal installation can be ideal.
If regional soil conditions include extensive hard rock, a vertical installation may be the only available choice. Vertical installations tend to be more expensive due to the increased cost of drilling versus trenching, but since the heat exchanger is buried deeper than with a horizontal system, vertical systems are usually more efficient and can get by with less total pipe. Your geothermal contractor will be able to help you decide which configuration best meets your specific needs. For a general description of visit here geothermal loop types.
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