Cleanest, Safest, Most Reliable HVAC Systems

Geothermal Heat Pumps give homeowners and companies the ability to reduce their carbon footprint while taking advantage of the most energy efficient heating and cooling system on the market. What makes a Geothermal Heat Pump so efficient is their use of the earth’s geothermal energy. The earth actually acts like a solar collector and stores heat deep in the ground. This stored heat, which remains a constant 55 degrees, can then be harnessed and used to heat and cool homes and buildings of all shapes and sizes. A homeowner using a Geothermal Heat Pump can expect efficiencies that are 400 – 500% higher than those of the most efficient traditional heating and cooling system. As a result, these homeowners will experience long-term savings with the added benefit of hot water.

Geothermal Heat Pumps are one of the cleanest, safest ways to heat and cool a structure. They operate on 100 percent electricity. This means that no carbon monoxide, carbon dioxide or other greenhouse gases will be emitted. Greenhouse gas emissions associated with the use of geothermal heat pumps are 55 to 60 percent lower than those from a standard air-source heat pump.

How Geothermal Heating & Cooling Works

Rather than generating heat, a geothermal system transfers heat from one place to another. The heat exchanger, commonly referred to as the geothermal loop, is buried in the ground and circulates a water solution through a series of pipes. This solution captures the stored solar warmth and delivers it back to the geothermal system located in the house. The geothermal unit then transfers the solar heat throughout the house using standard forced air ductwork or radiant floor heat to deliver comfortable indoor temperatures during the winter.

The same geothermal unit and underground loop system will reverse this cycle during the cooling season to provide air conditioning. The system removes heat and humidity from the air, then transfers and deposits that heat back into the earth through the same loop system.

Geothermal Loops

The heart of geothermal technology is the geothermal loop system and by installing a geothermal loop system, it’s like getting a 70% discount on energy for the life of your home. 

There are four basic types of geothermal loop installations; horizontal, vertical, pond and open. Three of these types – horizontal, vertical and pond – are closed-loop systems. Closed-loop systems use a continuous loop of polyethylene pipe as a heat exchanger. Horizontal and vertical systems are installed in the ground while a pond/lake system is installed in a body of water.

The fourth type of geothermal system is an open-loop and uses groundwater from a conventional well as a heat source in Winter and a heat sink in Summer. There is no significant difference in operating cost and efficiency between open- and closed-loop systems.

Here at Rabe Hardware, we’ll help you select the proper loop system based on a site survey and by conducting a detailed energy analysis of your home.

The Geothermal Benefits are Unmatched

Geothermal heating and cooling systems are quickly becoming the #1 choice for homeowners and businesses everywhere because the many benefits these high efficiency systems provide.  Thousands of Geothermal purchasers have chosen to enjoy the following advantages of geothermal over a conventional furnace and air conditioning system.



Lower Utility Bills
The most efficient gas furnace has an efficiency rating of 98%. Geothermal delivers a 400% efficiency rating.  That means for every 4 units of energy that are delivered, 1 unit of electrical energy is consumed.  Geothermal systems transfer heat versus burning fuel to create it.  This efficient use of energy transfer results in significantly lower operating costs.


Longer Life Cycle
Geothermal systems typically have a lifespan of 15-20 years rather than a 7-10 year lifespan on a conventional furnace and air conditioning system. The ground loop of the geothermal system (the pipes buried in your yard) is made up of polyethylene pipe, the same pipe which is used in city gas lines, and they have a lifespan up to 50 years.


Clean & Safe
Unlike other comfort systems, geothermal doesn’t emit any carbon dioxide, carbon monoxide, or other greenhouse gasses.  There is no combustion in a geothermal heat pump; therefore there is no chance of carbon-monoxide poisoning – and by adding high efficiency air cleaners, a high level of indoor air quality can be achieved.


Quiet Comfort
Geothermal heat pumps are very quiet and can be compared to that of a refrigerator.  Not only are geothermal systems extremely quiet, but you can also forget about hot and cold spots. With geothermal your indoor air temperatures will remain at consistent levels and you’ll see an improvement in air purification and dehumidification versus conventional systems.


Environmentally Friendly
By using a modest amount of electricity and not burning fossil fuels, we can significantly reduce our impact on the environment. Versus a traditional system, a standard 3-ton residential geothermal system produces approximately one less pound of carbon dioxide for every hour of use. Over 20 years, that’s like planting 120,000 acres of trees or taking 58,000 cars off the road!


Bonus Hot Water
Offering more than comfortable living, geothermal systems even have the capability of capturing reclaimed heat during heating and cooling modes to heat domestic water. This application can reduce the water heating cost of a four-person household by as much as 50-60 percent!

Geothermal Equipment, Warranty & Iowa Tax Credit


Rabe Hardware offers GeoComfort geothermal heating and cooling systems, one of the most efficient, reliable and quiet geothermal systems on the market.  Their full-line of products are on the cutting edge of geothermal technology and offer the best warranty and support in the industry.

GeoComfort Geothermal System’s Features
    • Elastomeric compressor vibration absorption pads and high density closed cell foam insulation make this one of the quietest units on the market.
    • The desuperheater captures waste heat during operation and transfers it into the domestic hot water supply, providing free hot water and enhancing the operation of the unit. 
    • foamed coaxial heat exchanger increases heat transfer for more efficient operation.
    • GeoComfort uses an all-aluminum microchannel air coil that eliminates the potential for failure due to corrosion and increases the unit’s life expectancy.
    • A variable speed blower helps maintain a consistent temperature throughout the home, while improving the quality of your home’s air and reducing utility bills 

GeoComfort Geothermal Systems

Geothermal FAQ's

The EPA and the U.S. Department of Energy recognize geothermal systems as the most environmentally friendly way to heat and cool. Unlike other comfort systems, geothermal does not emit carbon dioxide, carbon monoxide, or other greenhouse gasses which contribute to air quality pollution. There is no combustion in a geothermal heat pump; therefore there is no chance of carbonmonoxide poisoning. By adding high efficiency air cleaners with geothermal, a high indoor air quality level can be reached.

Geothermal systems typically have a lifespan of 15-20 years rather than a 7-10 year lifespan on a conventional furnace and air conditioning system. The ground loop of the geothermal system (the pipes buried in your yard) is made up of polypropylene pipe, the same pipe which is used in city gas lines, and they have a lifespan up to 50 years.

Geothermal is an investment. For many retrofit applications and especially new construction the energy savings will more than offset the cost of installation. On average, Geothermal heat pump users will see a 30%-70% reduction in their heating and cooling costs. That savings, over a period of time, plus utility rebates combined with Federal and State* tax incentives can roduce a return on investment in as little as 3 years. Recent studies have also shown an increase in home values for those with Geothermal systems due to the environmental impact and long-term savings.

A geothermal heat pump is an extremely competitive choice for a market forced to deal with rising energy costs and resource depletion because they are renewable and the most efficient heating and cooling system available today. Add in the fact that many ground source heat pumps can heat a home’s water for virtually no additional cost, you quickly realize that you can’t lose with a properly designed and installed geothermal heat pump.

It is true that a Geothermal heat pump installation can be more convenient during the construction. However, Geothermal heat pumps also provide a great option for replacing or upgrading an existing heating and cooling system to take advantage of this clean, safe & renewable energy.

As it turns out, geothermal is flexible and able to accommodate a variety of landscapes, from rocky, small-sized lots, to sprawling acreage. Numerous loop field installations have made it possible to install a Geothermal system just about anywhere.

A Geothermal heat pump is capable of providing consistent and adequate heating and cooling for your entire house as long as it is properly sized and installed. Make sure you only work with a contractor that is experienced and qualified in Geothermal heat pump design and installation to avoid any problems.

Although many parts of the country experience seasonal temperature extremes — from scorching
heat in the summer to sub-zero cold in the winter—a few feet below the earth’s surface the ground
remains at a relatively constant 55 degrees. So when the outside temperature is below freezing, a
geothermal heat pump should have no trouble extracting enough heat to keep your home 72 degrees or
more. Even when the ground freezes, the frost usually only extends three or four feet below the surface
which is not deep enough to effect the geothermal loop pipes which should be buried at least 7 feet
below the surface.

Archaeological evidence shows that over 10,000 years ago the North American Paleo-Indians settled near hot springs and were the first humans to use geothermal energy. Since many people live in areas without those hot springs, another way of harnessing the earth’s renewable energy was needed. So, in 1948 Professor Carl Nielsen of Ohio State University developed the first groundwater heat pump, for use at his residence. While modern advances in technology have increased the efficiency of these machines, the concept remains the same. Today, 85,000 geothermal heat pumps are installed annually across the United States and geothermal energy is considered an important step toward energy efficiency and the reduction of global warming.

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What Our Customer’s Have to Say


  • Thanks for doing such a good job.  Everyone was conscientious about their quality of work.  I gave your name and number to several people who liked what they saw and I told them you were fair and honest to work with.  I hope you get some additional business from this. Thanks again.–Ted Finch (Cedar Rapids,IA)

  • I love the Geo!  If by chance I would build again, you would my first call for all geothermal, plumbing and electric. The people at Rabe Hardware are the nicest, hardworking people I have ever worked with. You guys have been great with my Mom & Dad and that means a lot to me. You have a five star business.  No more buying propane or cutting wood for me! Thanks again.–Kelly Posusta (Douds,IA)

  • My wife and I wanted to pass along a big Thank You to you and your company.  We couldn’t be more happy with what we have.  From start to finish the process was extremely smooth.  The first time I met with Jake to talk about the Geothermal I was really clueless about the entire system but Jake broke it down into simple terms and in the end there was no doubt in our minds that we were going to go with the Geothermal system.  The scheduling process was smooth as was the communication with the guys on the jobsite. Coming from a homeowner who was acting as the General on his own home, this was very helpful.    They were all very easy to talk to and were very accommodating to our requests, not to mention they were clean and picked up after themselves.  Thank you again for everything, we sure appreciate it.–Matt & Alicia Hayes (Cedar Rapids, IA)

  • Matt was very knowledgeable, helpful and great to deal with–especially appreciate Rabe accommodating our needs to get the old AC unit disconnected so we could do some landscaping before the install the next day. The 3 guys who did the install were great too, efficient and thorough in cleaning up, etc, and showing us how to use the new thermostat. Thanks so much!–John & Dawn Stoakes (Dysart, IA)

  • We would like to thank every person at Rabe Hardware for the pleasant and professional work we received in the installation of heating, plumbing, and electrical contracting.  We constructed a new home in 2005, after visiting with Jake Rabe.  We took his suggestion and installed a Geothermal unit.  The unit surpassed all expectations, both in comfort and low operating cost.  Help with electrical and plumbing installation was great. The products are quality, the staff super and service exceptional.  It was a very good experience.–Denny & Wendy (Keystone, IA)

  • I love my air conditioner!! I wish I would have had it installed sooner. It runs so quietly and boy does it cool things down quickly. The guys from Rabe were fantastic. Very professional and friendly. One of the parts was wrong so they had to make a trip to get the right one and then it got to be about 4 and I asked if they were done for the day and they said, you don’t have air yet, so they stuck around and finished up the job instead of coming back the next day. The next day a tech came out to check the AC to make sure everything was working properly and then a few days later I received a follow up call asking how everything was working. The guys at Rabe’s are great!!– Stephanie Hofmaster (Newhall, IA)