Looking for an HVAC company in Manassas? From the Victorians around the Old Town railroad depot to the newer townhomes off Liberia Avenue, Leonard Splaine has serviced Manassas heating and cooling for decades, about 20 minutes up Prince William Parkway from our Woodbridge shop.
Why us?
Serving Manassas
Manassas is a city of contrasts for an HVAC tech: century-old Victorians and bungalows around the Old Town depot, post-war ramblers in Yorkshire and Sudley, and waves of 80s and 90s colonials and townhomes out toward Wellington and Liberia Avenue. Each generation of housing fails differently, and after 70 years in Prince William County we've worked on all of them.
The older homes near Old Town are classic mini-split territory: thick plaster walls, no ductwork, radiators or aging oil furnaces, and window units struggling through July. The newer subdivisions have the opposite problem, builder-grade systems that all hit end-of-life on the same schedule, so whole streets start replacing ACs within a few summers of each other. We right-size every replacement with a real load calculation instead of matching whatever the builder installed.
Manassas is a straight shot up Prince William Parkway from our Woodbridge shop, so same-day service is the norm here, not the exception. Three generations of the same family have run this company since 1956, and the continuity shows in the work: honest quotes before the wrench comes out, and one crew handling cooling, heating, and water heaters alike.
Our Services
From historic Old Town to the newest subdivisions off the Parkway: AC repair, installation, heating, heat pumps, and ductless mini-splits.
Manassas summers cook the commuter neighborhoods off Route 28 and Liberia Avenue, and we're there the same day when an AC quits. In the older Sudley and Yorkshire ramblers we see aging compressors and rusted-out condensate pans; in the newer townhome rows it's usually capacitors and refrigerant leaks in builder-grade systems. Either way: straight diagnosis, flat-rate price, fixed on the first visit whenever possible.
Heating in Manassas runs the full spectrum, gas furnaces in the subdivisions, heat pumps in the townhomes, and still some oil heat and boilers in the houses around Old Town. We repair all of it, and we're one of the last companies in the region that services oil systems and delivers heating oil, which matters if you own one of the older properties near the depot.
A lot of Manassas subdivisions went up in the same few years, which means the original ACs age out together, and replacement season hits whole neighborhoods at once. We install and replace central air with a real Manual J load calculation, sized for your actual house including any finished basement or addition, and the replacement estimate costs you nothing, with financing available if the timing caught you off guard.
The Victorians and bungalows around Old Town Manassas were never built for ductwork, and that's exactly what ductless mini-splits are for. As a Mitsubishi Diamond Contractor we fit single- and multi-zone systems into historic homes without tearing into plaster, and they're just as good for the bonus rooms and garage workshops in the newer neighborhoods.
Heat pumps suit Manassas well: efficient through our mild winters, strong in summer, and one system instead of two. We repair every brand and install high-efficiency and dual-fuel setups, popular with homeowners replacing both an old furnace and AC at once, since the dual-fuel combo keeps gas backup for the coldest nights.
Pollen off the battlefield fields and dust from the Route 28 corridor clog Manassas coils and filters faster than most people expect. A spring tune-up cleans the coils, checks refrigerant and the capacitor, and heads off the mid-July breakdown. Our maintenance plan adds priority scheduling and waived diagnostics.
Brands
We repair every major brand and install new systems from the best of them. We're a Lennox Premier Dealer and a Mitsubishi Electric Diamond Contractor.
Current offers
Trust comes first, but fair deals don't hurt. Every offer below is available to every Manassas customer, every day.
Special Offer
On a New Carrier System
0% APR with 60 equal monthly payments on qualifying new Carrier systems, financed through Wells Fargo and subject to credit approval. Sale period August 1 – November 20, 2026. Mention this offer when you book and we'll run the numbers on your replacement.
Expires: 11/20/2026
Special Offer
On a New Lennox System
Rebate up to $1,300, paid as a Lennox Prepaid Mastercard®, on a qualifying Lennox home comfort system, or combine a rebate up to $1,100 with 0% financing for 60 months. Buy July 6 – August 14, 2026; install by August 21. Qualifying system required; see us for details.
Expires: 08/14/2026
Special Offer
Plus 3% Off When You Pay by Cash or Check
Valid ID required. Applies to service visits. Cannot be combined with other discounts or offers. Ask about our 3% discount when paying by cash or check.
Expires: 12/31/2026
Why us
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Reviews
Real reviews from real Leonard Splaine jobs across Manassas and Northern Virginia, from same-day AC repairs to full system installs. We've earned our 4.9-star average the slow way: answering the phone, showing up on time, and doing right by every home.
Lynn Gilbertson Google review Kyle provided emergency holiday weekend service when our a/c was completely out with 104F "feels like" temperatures. He quickly diagnosed and fixed our system, with solutions for avoiding similar problems in the future. We are grateful to Kyle and Leonard Splaine!
Katie Kada Facebook recommendation Couldn't have asked for better service! Leonard Splaine was timely, honest and did a wonderful job replacing our very outdated AC unit. We plan to use them again for any service or replacement in the future and we'll recommend them to our friends and family.
I will definitely use this company again! Our AC went out on one of the hottest days of the year. They answered and came to the rescue! Family owned and very kind. Technician was knowledgeable and quick.
Ankur Mundra Facebook recommendation I've used Leonard Splaine the last 5 years. They are professional, provide quality service, and answer my questions and concerns. Michael Ford came out this year to do my spring maintenance as well as eztrap installation and condenser coil cleaning. He did an excellent job.
Candace Bond Google review They were such gentlemen and seemed to be very knowledgeable and honest. They were also very patient and took the time to answer all of our questions. I would highly recommend these guys.
A/C stopped working on the hottest day of the year, so far. They came over the same day and had it up and running in no time. The price was reasonable and the tech was great.
Our Team
Every Manassas visit is handled by real, named people who treat your home like their own. We're family-owned, 70 years in, and three generations of the same family crew. When you call Leonard Splaine, you reach these folks. Learn more about us.
Ted Leonard 3rd-Generation Owner 
Gary Leonard 2nd-Generation Owner 
Johnny Baker General Manager 
Erin Simmons Office Manager 
Brian Boyce Service Manager 
Brad Hoskins Field Supervisor 
Ira Sacknowitz Install Manager 
Ricky Seminario Comfort Advisor Where we work
Headquartered on Occoquan Road in Woodbridge, Manassas is part of Prince William County, and our techs cover the surrounding towns every day.
Don't see your town? If you're in Northern Virginia, call us. Odds are we've got a truck nearby.
Good questions
The things homeowners ask us most. Anything else, the phone's faster than the internet.
Yes. Our techs work the City of Manassas, Manassas Park, and the surrounding Prince William County neighborhoods like Sudley, Yorkshire, and Wellington every week.
That's some of our favorite work. Plaster walls, no ductwork, radiators, oil heat, we've serviced Manassas's older housing stock for decades, and ductless mini-splits have been a game-changer for those homes.
In most cases, yes. We run a large fleet out of Woodbridge and hold room in the schedule for same-day repair calls across Northern Virginia. Call before noon and we can almost always be there the same day. Earlier in the day is better during peak season.
For residential HVAC, our diagnostic fee is $89. It covers a real diagnosis and a straight, written price before any work starts. Maintenance members have the diagnostic fee waived when they proceed with the repair. Ask us about the membership. Replacement estimates for HVAC systems, water heaters, electrical panels, and EV chargers are always free.
Yes. We work with multiple financing partners and pass along manufacturer promotions as they run, including 0% and low-monthly-payment options on new systems. Tell us your budget and we'll build options around it.
All of them. Our technicians repair every major brand of furnace, heat pump, AC, boiler, and water heater. For new installations we're a Lennox Premier Dealer and a Mitsubishi Diamond Contractor, including ductless mini-splits, and we also specialize in Carrier.
We do. We're one of the last companies in Northern Virginia that both services oil heating systems and delivers home heating oil and off-road diesel. If you have an oil furnace or boiler, you only need one phone number.
Yes. Alongside heating and cooling we install air filtration, whole-home humidifiers, UV purification, and air purifiers, a big help during Northern Virginia's pollen seasons and dry winters. Ask about it during any air conditioner or furnace visit, or book an air quality assessment on its own.
Yes, and it matters. Leonard Splaine has been owned and run by the same family for three generations, since 1956. We haven't been bought by private equity, and we're not going to be. When you call us, you're dealing with people whose name is on the trucks.
Same-day service across Northern Virginia. Talk to a real person, day or night.
