Looking for AC installation or replacement in Northern Virginia? Leonard Splaine installs new central air conditioners right-sized with a real load calculation. Estimates are free, 0% financing is available, and most systems can go in next-day.
Why us?
Serving Northern Virginia
A new air conditioner is only as good as its installation. Before we quote, we run a Manual J load calculation so your system is sized to your home, not guessed from the old unit. As a Lennox Premier Dealer we install high-efficiency central AC and heat pumps at the SEER2 rating that fits your budget, correct and seal the ductwork, set the refrigerant charge to spec, and haul the old equipment away. The estimate is free and in writing, 0% financing options are available through our partners, and if the schedule allows we'll have the new system cooling the house tomorrow.
Anybody can set a condenser on a pad; the craft lives in the sizing, the ductwork, and the refrigerant charge, details we've been sweating since 1956. Three generations of the same family have stood behind our installations, Lennox trusts us as a Premier Dealer, and financing through our partners keeps a right-sized system within reach.
One call, answered around the clock by a real person, puts a free in-home estimate on the calendar, often for the same day. You'll hold a load-calculated quote in hand before committing to anything.
Our Services
From the first load calculation to next-day install, here's what a new system with Leonard Splaine covers.
Ready for a new system? We install central air conditioners across Northern Virginia, matched to your home with a real load calculation and installed clean: new pad, correct line set, sealed connections, and a proper refrigerant charge. As a Lennox Premier Dealer we back it with free estimates and next-day installs on most systems.
When it's time to replace, we swap the old system out and the new one in, haul away the old equipment, and recover the refrigerant responsibly. You get an upfront, itemized quote and a system that fits the house instead of whatever was there before.
A higher SEER2 rating means lower summer power bills. We help you find the efficiency sweet spot for a Northern Virginia home and walk you through the payback, plus any manufacturer rebates and 0% financing options, so you upgrade without overpaying for efficiency you won't use.
We never guess your system size from the old unit. We run a Manual J load calculation on your home, factoring square footage, insulation, ductwork, windows, and sun exposure. Right-sizing is what keeps a new AC from short-cycling, controls humidity, and gets you the comfort and efficiency you paid for.
A perfect AC still underperforms through leaky ducts. During an install we inspect the ductwork, seal leaks, and repair or add runs so the cool air actually reaches your rooms instead of leaking into the attic. Better airflow, more even temperatures, and a system that isn't fighting itself.
A new system is the right time to upgrade the controls. We install and wire smart and programmable thermostats, set up scheduling and zoning, and make sure the thermostat and the new equipment actually talk to each other, so you get the efficiency the system is capable of.
Brands
We install and replace new central AC and heat pumps from the best brands. As a Lennox Premier Dealer and Mitsubishi Diamond Contractor we match the right system to your home and budget, and we service every major brand too.
Current offers
Trust comes first, but fair deals don't hurt. Every ac installation & replacement offer below is available to every Northern Virginia 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
The difference
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Reviews
Real reviews from real Leonard Splaine ac installation & replacement jobs across Northern Virginia. 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 ac installation & replacement 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, we bring ac installation & replacement to Prince William, Fairfax, Arlington, Alexandria, Stafford, and the towns in between 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 questions Northern Virginia homeowners ask us most about ac installation & replacement. Anything else, the phone's faster than the internet.
It depends on the size and efficiency your home needs, which is why we never quote sight-unseen. We give you a free, itemized estimate after a load calculation, plus 0% financing options so a new system fits your budget.
A straightforward central AC or heat pump swap is usually a one-day job, and we offer next-day installs on most systems. More involved jobs with ductwork or electrical changes can take longer, and we tell you the timeline upfront.
Higher SEER2 means lower energy bills but a higher upfront cost. For most Northern Virginia homes the sweet spot balances the two, and we'll walk you through the payback so you're not overpaying for efficiency you won't use.
With a Manual J load calculation, factoring square footage, insulation, ductwork, windows, and sun exposure. An oversized unit short-cycles and never controls humidity; an undersized one never keeps up. Right-sizing is the difference between comfort and a callback.
Yes. We work with several financing partners and pass along manufacturer promotions, including 0% and low-monthly-payment options with approved credit.
Same-day service across Northern Virginia. Talk to a real person, day or night.
