Looking to improve your indoor air quality in Northern Virginia? Leonard Splaine installs air filtration, UV purification, air purifiers, and humidity control to help your family breathe cleaner, healthier air.
Why us?
Serving Northern Virginia
The air inside your home can be dirtier than the air outside, full of dust, pollen, pet dander, mold spores, and other pollutants your HVAC just recirculates. If someone in the house has allergies or asthma, or you just can't seem to shake the dust, better indoor air quality helps. We look at what's actually going on and fix it at the source: high-efficiency filtration, UV purification to kill mold and bacteria, whole-home air purifiers, humidity control, and duct cleaning, all tied into the system you already have.
Air quality is personal: allergies, asthma, a baby's nursery, a dusty house you can't get ahead of. We've been inside Northern Virginia homes since 1956, and we'd rather tell you a better filter solves it than sell you equipment you don't need. That honesty is reflected in a 4.9-star average from over 1,300 Google reviewers.
Start with a conversation. Call us at any hour and a real person, not a recording, will listen to what's going on in your home and book an air quality assessment, in many cases for later that day.
Our Services
Filtration, purification, humidity control, and duct cleaning for cleaner air across Northern Virginia.
The filter is your first line of defense, and a cheap one-inch filter doesn't do much. We fit your system with high-efficiency pleated and media filters that actually capture dust, pollen, and dander, sized so they clean the air without choking airflow.
Mold and bacteria love the cool, damp coil inside your air handler. A UV germicidal lamp mounted at the coil kills mold, bacteria, and viruses as air passes over it, keeping the coil clean and the air healthier, with no filters to change.
A whole-home air purifier installed in your ductwork cleans every bit of air your system moves, capturing the fine particles a standard filter misses. Great for homes with allergies, asthma, pets, or anyone who just wants cleaner air.
Northern Virginia swings from bone-dry winters to muggy summers. A whole-home humidifier fights winter dry air, static, and cracked skin, and a dehumidifier tames summer mugginess and mold, so your home stays comfortable and healthy year-round.
Years of dust, debris, and sometimes mold build up inside your ducts, and your system pushes it all through the house. We clean the ductwork so you're not recirculating the same old dust, and so your airflow and air quality both improve.
We don't sell you gadgets you don't need. We look at your home, your health concerns, and your system, then recommend the filtration, purification, or humidity control that actually solves your problem, and nothing you don't need.
The difference
Already know what you need?
Reviews
Real reviews from real Leonard Splaine indoor air quality 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 indoor air quality 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 indoor air quality 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 indoor air quality. Anything else, the phone's faster than the internet.
Because you breathe indoor air most of the day, and it can be dirtier than outdoor air. Dust, pollen, dander, and mold spores get recirculated by your HVAC, which affects allergies, asthma, sleep, and overall comfort.
It depends on the problem. High-efficiency filtration helps most homes; UV lamps target mold and bacteria on the coil; air purifiers catch fine particles; humidity control fixes dry or muggy air. We recommend based on what your home actually needs.
Yes, for what they do. A UV germicidal lamp at the coil kills mold, bacteria, and viruses as air passes over it, and keeps the coil clean. It works best as part of a plan, alongside good filtration.
In our climate, sometimes both, in different seasons. A humidifier fights dry winter air, static, and cracked skin; a dehumidifier tames muggy summers and mold. We can set your home up for year-round comfort.
It can be, especially if you've had a renovation, pests, mold, or visible dust blowing from the vents. It removes built-up debris so your system isn't recirculating it. We tell you honestly whether your ducts actually need it.
Same-day service across Northern Virginia. Talk to a real person, day or night.
