Heating Replacement & Installation in Manassas, VA

Heating Replacement & Installation in Manassas, VA

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Exploring Two-Stage Furnaces

Even the best systems won’t last forever. If your unit is unreliable or inefficient, upgrading can improve comfort and lower energy bills.

Common signs it’s time to replace include:

  • Frequent or costly repairs in the last two heating seasons
  • Uneven temperatures, cold spots, or poor airflow
  • Rising energy bills despite regular maintenance
  • Excessive noise, short cycling, or constant running
  • Visible rust, cracks, or a failed heat exchanger
  • System age near or beyond its expected lifespan
  • Outdated equipment using discontinued parts or refrigerants

Our Heating Installation & Replacement Services



  • Furnaces: High-efficiency gas furnaces deliver powerful heat and steady comfort, ideal for cold snaps in Northern Virginia. Options include variable-speed blowers, sealed combustion, and smart thermostat integration.
  • Boilers: For homes with radiators, modern boilers provide quiet, even heat and excellent durability. We install high-efficiency condensing models and can discuss zoning, indirect water heating, and control upgrades.
  • Heat pumps: Heat pumps provide heating and cooling in one system. Today’s cold-climate heat pumps offer efficient performance even in low temperatures and pair well with smart controls and zoning.
  • Geothermal systems: Ground-source heat pumps leverage stable earth temperatures for exceptional efficiency and long service life. Our team installs loop systems (horizontal, vertical, or well-to-well) tailored to your property.
Boiler heating system

Why Choose Parrish Services for Heating Installation?


What heating system is best for my home in Manassas?

It depends on your home’s layout, insulation, energy source, and comfort preferences. Gas furnaces excel at strong, fast heat; heat pumps provide efficient all-electric comfort year-round; boilers deliver quiet radiant warmth; geothermal offers top-tier efficiency if the site allows. We’ll walk you through your options to help you find your best fit.

Can I repair my heater instead of replacing it?

Repairs can be a better option than a replacement, especially if the system is younger, repairs are minor, and energy bills remain stable. Replacing your unit becomes the better choice when repairs are frequent or expensive, the unit is near end-of-life, efficiency has dropped, or safety is a concern.

How long do furnaces last before needing to be replaced?

With proper maintenance, many furnaces last 15 to 20 years. Factors like installation quality, filter changes, and ventilation affect longevity. If your furnace is approaching this range and showing performance issues, a high-efficiency replacement can improve comfort and lower operating costs.


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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.

Alton our technician was awesome. Extremely professional, courteous, and knowledgeable. I appreciated him taking on all my questions and able to answer them so thoroughly without ever feeling rushed. Definitely will be requesting him on all our electrical home needs going forward.
Chris Gabriel
Chris Gabriel
00:22 13 Feb 25
I had a great experience with Parrish, and the head technician, Danny Shoop (the assistant was also very good). We had a number of plumbing issues that needed repair, and the work was completed to our satisfaction. I was impressed by Danny's professionalism, his work ethic, and the suggestions and recommendations he made. I will definitely use Parrish again.
Trina Santry
Trina Santry
19:35 07 Feb 25
I wanted to express my sincere appreciation for Nathan Wilkinson for the exceptional service provided during the recent gas inspection. Your expertise and professionalism were evident from the start. You arrived promptly at the scheduled time, demonstrating a strong commitment to punctuality. You conducted a thorough and meticulous inspection of the gas systems, ensuring every detail was carefully examined. Your knowledge and attention to safety measures were remarkable. Thank you
Rita Domit
Rita Domit
14:09 28 Jan 25
I woke up at 6:30 with my smoke detector going off. Changes batteries but that didn't work. Web said they might be end of life, so I turned to m electrician. Parrish was wonderful! She was patient with me and went out of her way to help get it add today. Alton was the tech who was also helpful, patient, and informative. He came out and fixed the problem. He was professional and made me feel listened to. Cost was reasonable. Highly recommend this company.
Wendy Martinez
Wendy Martinez
22:52 22 Jan 25
Andre and the other technician did a great job installing the new furnace hot water heater and air conditioner. I appreciated the prep and care taken in my home as they carried out the old and brought in the new furnace and hot water heater. Andre took the time to answer what overall questions I had and kept me up to date on the installation progress.
Cynthia Venne
Cynthia Venne
14:07 20 Jan 25
Brandon did a routine inspection of our HVAC that we knew was reaching its replacement age. He was very professional and honest with his assessment and what needed to be repaired or replaced and why, complete with photos and diagnostics. He made sure I knew all my options and pricing (including cost savings) for the recommended parts and services. Very happy with Brandon’s service and Parrish in general.
Brett Gillies
Brett Gillies
14:43 17 Jan 25
Clarence Boyd fixed the toilet tank leak. He diagnosed the issue so quick and resolved it in less than 30 min. He is courteous, knowledgeable and efficient. I highly recommend him.
Rita Domit
Rita Domit
14:14 15 Jan 25
Alton conducted a comprehensive inspection of our home's electrical system. He explained issues as he found them, and even made water heater and fire safety recommendations. I was pleased with his ability to communicate issues clearly and provide a quick turnaround for the quotes.
nihad khdair
nihad khdair
01:02 15 Jan 25
My wife, Janice, worked with Alton Wallace to convert our fireplace from gas to electric, and Alton was wonderful! We’d never tackled a project like this before so we had some questions along the way, but Alton was very patient and willing to walk us through step-by-step. He was personable and very knowledgeable. We would definitely recommend Alton to future clients!
Douglas Gore
Douglas Gore
21:36 13 Jan 25
I am very pleased with the excellent service I received today from Nathan W. with Parrish services. He diagnosed the issue quickly and got my heat back on! He answered all my questions and was polite and courteous! Parrish has been our Heating/AC maintenance company for many years and always gives great service!
Anne Leeson
Anne Leeson
20:01 10 Jan 25