Fuels, including oil, propane and natural gas, are the biggest heating and cooling expense for most American households. You can reduce your use of fossil fuels like these and greatly reduce your heating and cooling costs with a geothermal heat pump system.

Less Fuel Reduces Pollution & Expense

When compared to propane, oil and natural gas furnaces, geothermal heat pumps are far and away the least expensive to operate. If you compare geothermal to a new high-efficiency natural gas furnace, you could cut your operating costs almost in half! In the long run, a geothermal solution provides an excellent return on investment.

Your Local Geothermal Experts

Doug’s Heating & Air Conditioning was one of the first in the area to install, maintain and service geothermal heating and cooling systems. Since 2000, we’ve provided The ClimateMaster system — one of the greenest, most efficient ways to heat and cool your home.


We have the experience and expertise to install, maintain and service most residential and commercial geothermal equipment. You can rest assured knowing that Doug’s 7-Point Guarantee will ensure that we’re on time. Plus, our courteous technicians won’t leave until they have tidied the work area.

Homeowners enjoy geothermal heating and cooling systems for many reasons, including:

  • Clean, green energy from the earth
  • Proven reliability and long life: Receive a 10-year limited warranty on the heat pump unit and 50-year limited warranty on the underground pipes
  • Heating, cooling and water heating within one unit
  • Flexible installation options
  • Quiet operation
  • Federal tax credits — ask Doug’s for details

Remember to ask our staff about current geothermal credits and rebates. Contact us today for more Quad Cities geothermal heating and cooling information! 

2021 Home Improvements

February 22, 2021

Stimulus checks and tax returns will allow some of us to upgrade our homes, which is why the team at Doug’s Heating & Air Conditioning collected some ideas for small and big spenders.   Air Quality Investing into clean air for you and your loved ones is the most affordable solution. You may consider air…

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Consider These Five Things Before Investing in Geothermal

June 25, 2019

Whether you’re looking to go green or trying to save on your energy bills, many people are looking for alternatives to control the temperature in their home. Geothermal is one such option that leverages an abundant supply of renewable energy and growing technological support in its favor. However, the initial cost can be quite high…

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Does Geothermal make sense for your home?

August 22, 2018

There is no doubt that installing a geothermal heat pump is an environmentally friendly method to heat and cool your home, including water. Instead of relying on oil, geothermal generates warm or cold air in your home through pipes buried in the ground. This process operates in a slightly different way than your standard HVAC system.…

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May 24, 2017

Did you know the temperature of the earth/soil increases the further you dig? Did you know the temperature just a few feet below the ground barely changes throughout the year?  This underground temperature is between and 45 and 75 Fahrenheit depending on your location. Ground source heat pumps, direct use geothermal technologies, and enhanced geothermal…

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Geothermal Energy Systems

September 15, 2015

Look who visited us at one of our sites today: our congresswoman Cheri Bustos! Congresswoman Bustos was eager to hear what Chris Cacari from Doug’s Heating & Air Conditioning had to say about the advantages of Doug’s Geothermal Energy Systems. Geothermal systems use small amounts of electricity to transfer heat to and from the ground…

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What are Alternative Heating Options and How to be Safe?

February 16, 2015

There are alternative heating options available which can help combat rising energy costs.  These options include geothermal heaters, wood and pellet heaters, solar heating, and much more which efficiently heat space while using less energy than traditional systems.  However, alternative heating options often carry a larger risk of fire or other hazards.  So, it is…

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Propane vs. Geothermal

March 18, 2014

Most propane furnaces have efficiency ratings around 90 to 95 percent.  The remaining 10 percent escapes through the flue during combustion.  Geothermal heat pumps are often measured using a coefficient of performance – a ratio of heat produced to energy consumed to produce it.  The coefficient of performance is multiplied by 100 to determine the…

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Geothermal Units vs Propane Tanks

March 19, 2013

Geothermal units are the perfect replacement for propane tanks. Ground source heat pumps are able to provide heating, cooling and hot water, while cutting energy use by up to 80%. Because a GHP system is so efficient, it uses a lot less energy to maintain comfortable indoor temperatures. This means less energy is needed to…

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They call Propane Tanks PIGS for a reason. Find out how we can take the squeal out of your heating bill.

March 2, 2012

Geothermal units are the perfect replacement for propane tanks. Ground source heat pumps are able to provide heating, cooling and hot water, while cutting energy use by up to 80%.  Not only does it cost less, but you also qualify for tax incentives!  Contact Doug’s today to find out what options are available to you!…

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"Just to let you know your crew did a wonderful job.  Very professional and yet friendly.  Extremely knowledgeable and cleaned up everything as if they were never here.  We would recommend Doug’s to anyone."

— Jolene,  Colona, IL

“We had a very courteous estimator. He showed up on time. We couldn’t ask for a nicer guy. He took about 45-minutes or so, but was very thorough.”

— Jim, Coal Valley, IL

“They wear shoe protectors. They’re very careful and courteous with your property.”

— Jim, Coal Valley, IL

“Prompt, courteous, very professional workmanship...they did a very nice job.”

— Jim, Coal Valley, IL

“They came out exactly when they said they would be here.”

— Gloria, Coal Valley, IL

“The service technicians are like friends. They are very courteous to us, and take the time to explain any questions we have.”

— Gloria, Coal Valley, IL

“Actually I searched around to have my geothermal serviced and they were not only one of the first, but they were one of the only ones that knew how to service the geothermal and knew about geothermal.”

— Vicky, Moline, IL

“I felt like they knew exactly what they were doing. They were on time.  That's important to me, because I work.”

— Vicky, Moline, IL

“I would say they were one of the first companies that I could find that can service geothermal heating.”

— Vicky, Moline, IL

“They stand behind what they sell and they’re there for you.”

— Gail, Moline, IL

“They respect our home.”

—Gail, Moline, IL

“We’re just really happy. We call them for everything.”

— Gail, Moline, IL

“I would recommend them over any other heating and air conditioning company in the Quad Cities.”

— Richard, Moline, IL

“They're courteous, they come on time. They come when they say they're gonna come and they get the job done.”

— Richard, Moline, IL

“They are efficient. They are always on time and very friendly staff.”

— Hemispheres Bistro, Bettendorf

“The exhaust system works perfectly. I mean it’s designed really, really well.”

— Hemispheres Bistro, Bettendorf

"We have a NEW Heating & Air Conditioning System from Doug's & we are VERY HAPPY with it."

— John from Moline, IL

"In this crazy mixed up world where most companies are only focused on money it was great to find a company that honestly cares. I can’t say thank you enough for the great customer service we have received!"

— Sarah from Davenport, IA

"Doug's just made our day! They were here within 3 hours to fix our dead furnace, less than an hour after they arrived we have heat! Thanks so much!"

— Ryan from Rock Island, IL

"Please know that Ben was so very pleasant when he serviced our generator. His kindness toward our little 4 year old grandson left quite an impression...who knows, our little guy may decide on a Htg/AC career and come ask you for a job!"

— Carole from East Moline

"I've owned this house for 7 years and the heating system has never worked as well as it does now!"

— Jim from Moline, IL

"I wanted to let you know that Matt was such a nice man while helping us with our estimate!"

— Mary from Sterling, IL

"I want to commend Ben at Doug's Heating and Air Conditioning on his professionalism and courteousness!"

— Connie from Moline, IL