Geothermal

Geothermal Heating And Cooling Manassas, VA

A geothermal heat pump captures the consistent temperature of the earth and transforms it into home comfort. The process is simple, eco-friendly and efficient. Geothermal technology provides an efficient and sustainable solution for heating and cooling properties. In winter, circulating coolant passes through underground piping, where it extracts heat from the warmer ground.

In summer, the process reverses. Liquid coolant removes heat from a home’s interior and carries it underground, where it dissipates into the cooler environment. Geothermal heating can significantly reduce homeowners’ energy bills, offering potential annual savings that can offset installation costs. You enjoy quiet, even geothermal heating and cooling for your Northern Virginia home without direct fuel consumption, carbon emissions, or undue wear and tear on HVAC equipment.

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Happy Family With A Dog Under A Roof Symbol

Parrish Services installs geothermal heating and cooling systems for any home location—urban, suburban, or rural. Choose the installation that suits your property best:

Geothermal technology is an efficient and sustainable solution for heating and cooling properties, providing significant benefits in terms of comfort and environmental impact.

  • Vertical loops: closed-loop tubing inserted and fixed into a series of deep, small-diameter vertical wells; best for urban areas where space is limited
  • Slinky coils: overlapping coils of tubing laid in horizontal trenches; a compact system for achieving more capacity in less space
  • Horizontal ground loops: coiled tubing laid in a series of horizontal trenches; recommended for rural areas with sufficient landscape space

Geothermal systems operate using a series of pipes, known as a loop, which are installed underground or submerged in a nearby water source. These pipes contain a water-based solution that absorbs heat from the ground. This absorbed heat is then carried back to the geothermal heat pump located inside the building. During the colder months, the heat pump transfers this heat into the building, providing efficient warmth. In the warmer months, the process reverses: the system absorbs heat from indoors and transfers it back into the ground, effectively cooling the space. Geothermal heat pumps are integral to these systems, offering a dual-function solution for both heating and cooling. By utilizing geothermal heat, these systems provide a consistent and energy-efficient way to maintain comfortable indoor temperatures year-round.

Retrofit Existing HVAC Systems to Geothermal

Parrish Geothermal HVAC Services

  • Site evaluation
  • Sizing calculations
  • Trenching & drilling
  • Permitting
  • Ductwork evaluation
  • Indoor air quality equipment
  • Programmable & smart thermostats
  • Heat pump systems

Harnessing geothermal energy pays dividends for your budget and the environment. When you install a geothermal heating and cooling system in Manassas, you’ll enjoy these homeowner benefits:

  • Lower utility bills
  • Greater heating & cooling efficiency
  • Less fossil fuel use
  • Longer system lifespan
  • Heating & cooling from one system
  • Even temperature control
  • Safe & quiet operation
  • No outside unit
  • Lower environmental impact
  • Lower maintenance costs 
Geothermal Heating System With Underground Loops

New Builds & Retrofits: Parrish Does It All


What is a geothermal heat pump?

A geothermal heat pump uses the Earth’s stable underground temperature to heat or cool a property. It transfers heat from the ground during winter and removes heat from the home in summer for efficient climate control.

How do geothermal systems reduce energy bills?

Geothermal systems are highly energy-efficient because they leverage the Earth’s natural heat, reducing the need for fossil fuels. This efficiency can significantly lower utility bills over time compared to traditional HVAC systems.

What are the types of geothermal system installations?

Geothermal systems include vertical loops, horizontal ground loops, and slinky coils. Vertical loops are ideal for small spaces, while horizontal loops suit rural areas. Slinky coils are compact and offer high capacity in smaller landscapes.

Can geothermal heating be retrofitted into existing homes?

Yes, geothermal systems can be retrofitted to work with your home’s current ductwork and air quality equipment. For more details about retrofitting, reach out to us to explore how geothermal can work for your property!


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Customer Reviews

Parrish has the best customers in Northern Virginia, hands down! To learn more about the Parrish Difference or discover the many reasons that so many new customers are now lifetime customers, check out these stories from verified clients.

Parrish Services technicians are invariably excellent at their job and very personable. The company may not always be the cheapest one in the area but the few extra percents on the bill buy the very best services in northern Virginia. I would not think of using anybody else.
Philippe Lacoude
Philippe Lacoude
17:20 29 Aug 22
Just a standard maintenance evaluation on my HVAC system but my tech was on time, polite, thorough and knowledgeable. He advised me on parts I can replace myself to buy a little more time with my current older unit rather than trying to upsell me. He advised that I will likely need a new unit in the next couple of years, but again did so without any pressure to address prematurely. Overall it was great exchange and established a sense of honest trade work. This will not be forgotten when it is time to buy a new system!
Tim Brown
Tim Brown
19:01 26 Aug 22
This was our 1st annual check up. Robert was very helpful and professional. However, we found the prices to be very high. We’ll have to really consider the recommendations.
Rickey Butler
Rickey Butler
15:47 17 Aug 22
Team was friendly, professional, focused and in great spirits. So far I have no complaints, no criticisms, house is the perfect temperature. Great job!
Michael Arko
Michael Arko
12:30 16 Aug 22
Great service overall! Doug B did a thorough job on my HVAC check providing info on preventative maintenance need next time I need HVAC check, which I will definitely do between Nov and Jan! Great job!!
Lisa Timmering
Lisa Timmering
01:58 02 Aug 22
Joe was exceptional! He quickly diagnosed the issue with my A/C unit/cleared the "fault" and wa-la, the until began working again! Thanks Joe for your work!
Lisa Hensley
Lisa Hensley
15:59 01 Aug 22
When your air conditioner goes out, and it's July...the hottest month of the year...it's an emergency! So I took the first appointment I could get with a company that used a bait and switch technique of leading me to believe they could come soon- only to later confess they would have to come later. I kept calling around and got someone at Parrish Services. They were honest about what they could and could not do. They sent out true professionals who diagnosed the problem within 10 minutes...fixed it, and spoke honestly about what they were doing and what to look out for in the future! Thank you Parrish Services!!
grady powell jr
grady powell jr
09:05 22 Jul 22
I have had a service contract with Parrish Services for many years. Everyone now and again I get pleasantly surprised with service for an issue that is most unpleasant.I had my semi-annual service check done 2 weeks ago. Over the past 2 days it's been warm in the house. I called Parrish to come back to look at the A/C system again. In a matter of 2 hours they were able to schedule next-day service, and the tech re-arranged his calls for service so that he spent less time driving. That meant I was next on his schedule based on location of service calls.The tech ended up locating a major coolant leak. We opted for the lesser of two expenses by having the coil replaced (a quarter of the price of a brand new unit; still not cheap, but better than replacing the entire unit).I am thankful for Parrish Services' scheduling diligence and courteous service. They bent over backwards to schedule a next-day appointment during a stretch of the year when they have an overabundance of A/C service calls.
Peter Prinz
Peter Prinz
13:50 21 Jul 22
Joe C is the Man! Very professional and knowledgeable. He kept me informed every trouble shooting step of the way. Parrish Services, Inc is definitely #1 on my list for all HVAC needs. Thank you!Also thanks to the young lady that booked my appointment! Sorry I can remember her name. She was very kind and found me an opening.
Lee Andrews
Lee Andrews
18:09 02 Jun 22
Really excellent service at all levels, from scheduling to the actual repair. Christopher L. was knowledgeable and extremely smart and persistent in diagnosing the problem and repairing it. We will definitely be using their services again. A+++++
The McFeely Rainbow Experiment
The McFeely Rainbow Experiment
19:56 25 May 22