Heat Pump Installation
By One Hour Heating and Air Conditioning of Northern VA (aka Modern Mechanical LLC)
One Hour Heating and Air Conditioning of Northern VA (aka Modern Mechanical LLC) offers professional heat pump installation near Ashburn, VA. Our skilled technicians assess your needs and install high-quality Carrier systems designed for year-round comfort and energy efficiency. We take pride in precise installations, ensuring your heat pump operates smoothly and reliably for years to come. Whether you're replacing an outdated unit or installing a new system, rely on us for reliable service and customized solutions to maintain your home's comfort all year long.
What Does The Process Look Like?

Book an Appointment
Get started by booking a heat pump installation appointment with your local Carrier dealer by giving them a call or scheduling an appointment online.

Evaluation & Estimate
Your local Carrier dealer will evaluate your home’s layout and heating and cooling requirements to recommend the right heat pump system for you. You’ll receive an estimate that outlines equipment options and prices, ensuring a solution that meets your comfort and budget needs.

Perform Installation
A certified technician will install your new heat pump, ensuring it's optimized for maximum efficiency and performance. From equipment placement to system calibration, they'll manage every detail of your heat pump installation to guarantee your home enjoys dependable comfort throughout the year.
Other Services We Provide

Heat Pump Repair
Count on us for dependable heat pump repair and service to keep your home comfortable year-round. Our experienced technicians troubleshoot issues, perform timely repairs, and ensure your system is operating at its highest efficiency.

HVAC Maintenance
We provide annual HVAC maintenance to keep your heating and cooling system running efficiently year-round. Regular tune-ups help prevent breakdowns, can improve energy efficiency, and extend the lifespan of your heating and cooling equipment.

HVAC System Installation
Let us ensure reliable comfort and energy efficiency for your home with professional HVAC system installation. We offer high-quality Carrier equipment, precise HVAC installation, and customized solutions to meet your heating and cooling needs.
Trusted HVAC Professional in Ashburn
Great Value and Fantastic service
May 14, 2025
One Hour heating won my business though competitive bidding and provided an exceptionally smooth installation experience. The install team and subsequent service teams have been highly professional and very competent. Very satisfied.
Nicolas
Expertise (5)
Solve Problems (5)
Service (5)
Hummel Install
April 22, 2025
Excellent work
Joseph
Expertise (5)
Solve Problems (5)
Service (5)
find another dealer - this dealer has no customer service and haggles customers
April 16, 2024
Worst customer service. Harasses customer
Mihon
Expertise (1)
Service (1)
Solve Problems (1)
Always great service year after year.
March 12, 2024
I have many years with this team and it's my second carrier install with them. They are very professional, prompt, and neat. I highly recommend them.
Brian
Expertise (5)
Service (5)
Solve Problems (5)
Great Service
January 24, 2024
They worked great and went above and beyond
Dario
Expertise (5)
Service (5)
Solve Problems (5)
Wonderful people to work with
January 05, 2024
The new heating and air conditioner system that was installed was for my mother. My husband and I have used Modern Mechanical for the past several years and we knew they were the ones to call when my mother's furnace stopped working. Modern Mechanical has always done an excellent job with any service we have needed and we would highly recommend them. Their reps are very kind and respectful and we know they will do the job right.
Daniel
Expertise (5)
Service (5)
Solve Problems (5)
New a/c and furnace. Installation and equipment first rate
December 12, 2023
We are very impressed with Modern Mechanical. They are very businesslike and professional. Communications are excellent.
STEPHEN
Expertise (5)
Service (5)
Solve Problems (5)
Amazing service and quick turn-around.
May 31, 2023
Amazing service and extremely knowledgeable
Jamie
Expertise (5)
Service (5)
Solve Problems (5)
Outstanding Service
May 30, 2023
Great customer service
Edward
Expertise (5)
Service (5)
Solve Problems (5)
Poor post sale customer service
May 15, 2023
At the time of the Carrier 5 Ton Variable Speed Infinity Air Handler FE4ANF006L00, the air handler was defective. I was reluctantly told by the installer that the heat element had a module or resistor that was made for a commercial unit and the system failed system checks. The heat from this air handler would not work until this was corrected. The installer could not get a replacement part for several days. When they arrived and installed the replacement module it had the same issue. Another week went by before a third attempt was made. This time it did work. I had to take three days off from work for this installation. The installer (Modern Mechanical) would do nothing to compensate for my time and aggravation. The salesmen stated that "I wanted to let you know that we did not manufacture these units we just put in what is given to us. We understand things happen, maybe the guy who puts this part together was having a bad day who knows!" I don't consider these statements to be an endorsement for the installer or the manufacturer.
Mark
Expertise (2)
Service (2)
Solve Problems (2)
My experience is average.
May 23, 2022
I have a broken door because of maintenance guys trying to open left side. The did not resolve my issue.
TIZIANA
Expertise (4)
Service (3)
Superb job
April 03, 2022
Very professional, courteous, high\-quality installation
SEAN
Expertise (5)
Service (5)
Solve Problems (5)
AMAZING Customer Experience
November 10, 2021
One Hour was amazing from the first contact to the final invoice. Everyone along the way was professional, helpful, and knowledgeable! We had several companies out to provide estimates and by far One Hour ranked above their competitors.
Meghan
Expertise (5)
Service (5)
Solve Problems (5)
Great experience with our installer!
September 08, 2021
Modern Mechanical did a super job overall and there technicians in particular explained everything and made the process extremely smooth.
Ray
Expertise (5)
Service (5)
Solve Problems (5)
Installation of an AC/ heating eating Unit at Lansdown Woods.
August 11, 2021
On time, Efficient, Our building Engineers complemented there work and they cleaned up before they called it a day. Mike R
Jeannie
Expertise (5)
Solve Problems (5)
Kind, knowledgable service
May 20, 2021
Everyone has been so wonderful with this company. We've only had great experiences. We will certainly return for future needs.
THOMAS
Expertise (5)
Service (5)
Solve Problems (5)
Innovative Installation
May 20, 2021
Modern Mechanical performed an installation which required thinking outside the box. They removed the previously installed equipment which had been mounted on concrete blocks and plywood then they correctly installed the Carrier unit.
David
Expertise (5)
Service (5)
Solve Problems (5)
Nothing but the best....
May 13, 2021
Nothing but the best.
John
Expertise (5)
Service (5)
Solve Problems (5)
Quality Work
April 01, 2021
Daniel \& Ron were very professional and did quality work. I had positive experience and would recommend them.
Dmytro
Expertise (5)
Service (5)
Solve Problems (5)
Ashamed product
March 23, 2021
Best quality and affordable cost
Khagendra
Expertise (4)
Service (4)
Solve Problems (4)
Outstanding
March 23, 2021
Contractor was very professional from the estimate phase, installation phase and the follow\-up visit to correct a minor installation mistake. Both management and tech staff were extremely professional. Well done!!
Ray
Expertise (5)
Service (5)
Solve Problems (5)
Heating/Cooling Installation
March 18, 2021
Excellent Work!
Ed
Expertise (5)
Service (5)
Solve Problems (5)
Major issues with new infinity furnace that took days to resolve while we went without heat. No real communication from anyone.
February 12, 2021
From what I understand Carrier shipped out a new model of the infinity furnace that we ordered with bad inducer motors. Three days after installation the furnace would turn on, ignite, then turn off. Modern Mechanical came out and replaced the inducer motor 3 times but it kept burning out. After several days without any heat on our main floor, which we had to use multiple electric space heaters to keep from freezing, they replaced the motor with a different brand. Since that point the unit has worked but I have very little confidence in this system and really wish we had gone with a different brand. Plus I am dreading the power bill for running 3 electric space heaters all day. While I understand the issue was a manufacturer defect we were left without heat for several days in the middle of 20\-30 degree days. After our last carrier install didn't go well I was very hesitant to do it again and I can now say for sure I will never buy carrier again. Horrible experience.
Eric
Expertise (3)
Service (3)
Solve Problems (3)
A Professional, Knowedgeable Team
October 07, 2020
When my a/c broke this summer, I had to replace it quickly during our 90 degree days. Modern Mechanical responded and a new system was installed by their skilled technicians. I would recommend this company.
Gerogia
Expertise (5)
Service (5)
Solve Problems (5)
Great service and product
August 07, 2020
On time and professional. Would definitely utilize again.
Lance
Expertise (5)
Service (5)
Solve Problems (5)
Great overall experience
August 06, 2020
Wonderful experience from estimate, to install, to after service. Highly recommend.
Cindy
Expertise (5)
Service (5)
Solve Problems (5)
From Start to Finish, a Great Experience
July 16, 2020
From the sales meeting to installation, One Hour Heating \& Air Conditioning was professional and informative. They did a great job installing the furnace and AC.
Douglas
Expertise (5)
Service (5)
Solve Problems (5)