Geothermal Heating

Description

Geothermal is smart business: it's cost effective and energy efficient.

Transcript
Geothermal Heating: Closed Loop Installations. Male Speaker: Geothermal systems are extremely efficient, with annual home energy savings between 30% and 60%. Though, nearly double the expense to install than traditional HVAC systems, the cost difference is typically returned to a homeowner in energy savings in less than ten years. Geothermal loops can be labor intensive, but with new technology recently introduced into the residential construction market, installation man-hours can be greatly reduced. Horizontal close loop installations are generally most cost effective for residential installs, particularly for new construction, for sufficient land areas available. These installations involve varying pipe and trenches dug with back hose. Dense clay soils are the best for geothermal exchange. Dry sandy soils transfer heat poorly. Michael Strasburg: Generally, my preferred type of soil for this type of application is actually marine clay. Though, there's who hate marine clay, but we happen to love it in this industry. It's got end, its excellent conductivity factor. It really pulls the heat and cooling off the pipeline very quickly. Arjay West: In this instance, because the rock is nice and deep, and the soils are appropriate, we're able to run 300 foot close loop horizontal trenches, and heat and cool this house effectively. Male Speaker: The series of trenches must be dug deeper than the frost line, and will hold the circuit of high-density polyethylene piping. This circuit will carry the mixture of water and antifreeze to and from the pumps to heat and cool the home. Michael Strasburg: The supply in the header pipe will meet up with the circuits going out to the field in this vault location. Male Speaker: Typically, this is done with a traditional socket-fusion technique, which is slow and time consuming. A more modern and efficient technique is Electrofusion. Electrofusion uses electricity to weld both sides of a coupling at the same time, in roughly five minutes. Michael Strasburg: We're going to install this pipe in a S figure. You can see it, S is in to keep equal and opposite force onto the coupling, that make sure that you don't end up pulling off the socket. The next step connects the positive, negative terminal of the Electrofusion equipment. The barcode tells the Electrofusion processor what fitting it is, gives it a exact amount of time and seconds for cooling and heating of the actual fitting. You can't get that out of the socket fusion. Male Speaker: Electrofusion can cut your install time nearly in half. Michael Strasburg: We've accomplished both fusions at once, which allow our crew to move on to the next fitting and hook up the machine. Male Speaker: When you're ready to back fill, the soil must be carefully sifted to remove any large rocks and stones that could potentially damage the lines. Michael Strasburg: After it's all been back filled, we'll make sure that the entire system is purged. We like to purge from the outdoor vault location that allows us to tap in out here, purge the system, bring in up the pressure, test everything and make sure we have adequate flow. Male Speaker: Geothermal is a science, so you need a sub who knows exactly what they are doing. Arjay West: There are HVAC firms, who have partnered with the scientists loop people of you will to create the solution. They understand how the heat exchange works and what one needs to do in order to put the loops in the ground properly, so that you get the right conductivity with the soil to get the proper heat exchange that you need to do the job. Male Speaker: The International Ground Source Heat Pump Association is a great resource for finding accredited geothermal installers and designers. Geothermal is smart business. It's energy efficient, healthy for the environment, and it's cost effective for you and your customers.
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