Looking for an HVAC company in Clarendon? Clarendon's leafy blocks hide some of Arlington's oldest housing a minute's walk from its newest. We keep the 1920s bungalows, Lyon Village colonials, and corridor condos comfortable without treating them all the same.
Why us?
Serving Clarendon
Clarendon grew up around a streetcar stop, and it shows in the housing: 1920s and 30s bungalows and foursquares on the side streets, grand brick colonials in Lyon Village and Lyon Park, and a spine of condos and apartments over the restaurants along Clarendon and Wilson. Some of the oldest homes in the county sit five minutes from some of the newest.
The old stock here was built with radiators, gravity furnaces, and zero ductwork, and the renovations since have produced every retrofit we know: attic air handlers over plaster ceilings, high-velocity systems threaded through balloon framing, mini-split heads in sunrooms and finished attics. Getting it right takes a company that has seen all of it, and we have, since 1956.
Between the historic blocks and the corridor there's also plenty of newer townhome stock with rooftop decks and packaged rooftop equipment, plus condo buildings with their own rules and closets full of fan-coils. One call covers every one of those buildings, and a real person answers it 24/7.
Our Services
Boiler care, ductless retrofits, attic systems, and condo work from Lyon Village to Courthouse.
Clarendon cooling fails in period-specific ways: the retrofitted air conditioner over 1920s plaster giving out in August, mini-split heads dripping over sunrooms, condo fan-coils quitting above the restaurant strip. We run same-day repairs across all of it, from Lyon Park foursquares to Courthouse condos.
Some of the prettiest heating systems in Arlington still run in Clarendon: cast-iron radiators fed by boilers older than their owners. We service them properly, along with the gas furnaces and heat pumps in renovated homes and the electric systems in the condos. Same-day no-heat response, every brand.
Air conditioning a 1920s Clarendon bungalow is design work, not catalog shopping: compact ducts through closets, high-velocity where the framing is tight, ductless where plaster should stay untouched. We size with a real load calculation, walk you through the honest options with upfront pricing, and back it with free estimates and 0% financing options.
Clarendon's housing was practically made for ductless: radiator-heated colonials, finished attics, sunrooms, and rear additions. As a Mitsubishi Diamond Contractor we design single- and multi-zone systems with heads placed to disappear into the room and condensers sited for narrow side yards.
Heat pumps are how Clarendon homes electrify without giving up comfort: cold-climate inverter systems replacing tired AC-plus-furnace pairs, or working alongside boilers in hybrid setups. We repair every brand and install systems sized for real 1920s construction, not spec-sheet assumptions.
Old-house systems need adult supervision: attic equipment baking under slate roofs, boilers due their annual safety check, condensate lines and drains threading over original ceilings. Our tune-ups cover the whole mix, clear the plaster dust that chokes indoor air quality in hundred-year-old houses, and keep utility bills from creeping. Maintenance plan members get priority scheduling and 15% off repairs.
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 Clarendon customer, every day.
Special Offer
Priced After the Year We Started
A one-time heating-system inspection with a straight report on what we find and a written price on anything that needs work. We set the price at $56 because 1956 is the year our family started this company. Covers one residential system. Mention this offer when you book.
Special Offer
Pay for the Repair, Not the Visit
The $89 residential service call comes off your bill when you approve a repair over $250 on the same visit. Maintenance members have the service call waived on any repair they approve, with no minimum.
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
Or 0% Financing for 60 Months
Rebate paid as a Lennox Prepaid Mastercard® on a qualifying Ultimate Comfort System™ with a qualifying thermostat. Or combine up to $1,400 with the same 60-month financing. Buy by December 4, install by December 11, 2026. Financing subject to credit approval.
Expires: 12/04/2026
Special Offer
Not valid on tankless or heat pump water heaters. Exclusions apply. Mention this offer when you book.
Special Offer
Not valid on tankless or heat pump water heaters. Exclusions apply. Mention this offer when you book.
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 Clarendon 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 Clarendon 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, Clarendon is part of Arlington 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.
Book now
Same-day appointments available. We'll call you right back.
Good questions
The things homeowners ask us most. Anything else, the phone's faster than the internet.
Absolutely, and we'd encourage you to keep them. Radiant heat is excellent. We add cooling alongside it, usually ductless or a compact attic system, and keep the boiler serviced so you get the best of both.
Yes. We service and replace the fan-coils and heat pumps in the corridor buildings, handle the certificate of insurance and elevator logistics with management, and schedule around building quiet hours.
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. Approve a repair over $250 on the same visit and the $89 comes off your bill, whether or not you are a member. Maintenance members have the fee waived on any repair they approve, with no minimum. 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.
