Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Aprilaire Vent Sanitizing: The Leesburg Owner’s Guide
We stock and install Aprilaire-compatible vent sanitizing systems for Leesburg homes, with typical installed pricing between $340 and $580 depending on duct configuration and whether the existing UV-C lamp or ionization cell needs full replacement. Most Aprilaire vent sanitizing jobs in Leesburg are completed same visit once the model is confirmed. Homeowners usually discover the system has failed when they notice musty airflow returning after what had been clean-smelling seasons, or when their Aprilaire air purifier’s indicator light stays amber or red past the recommended lamp-change interval.
Which Aprilaire Models This Applies To
Aprilaire vent sanitizing components fall into two product families that use different mounting and electrical specs. The 5000 series electronic air cleaners use a model 501 replacement ionizing wire and 413 media with an integrated sanitizing stage, while the separate vent-mounted UV-C units, including the 1910, 1930, and 1950 series, use a 9-inch or 16-inch germicidal lamp with a 24-volt ballast assembly. The 1950 series introduced in 2019 uses a snap-fit lamp socket that is not backward compatible with the threaded ceramic base on pre-2019 1930 units. We see this mismatch at least twice a month on service calls in Leesburg, especially in the newer construction near Riverside Parkway where builders spec’d the 1950 but homeowners ordered 1930 replacement lamps online.
To identify your unit, check the label on the lamp housing inside the duct, not the wall-mounted control panel. The lamp housing label carries the part family and manufacturing date. OEM Aprilaire lamps carry a two-year rated life at 9,000 hours; we also stock quality aftermarket equivalents from Abatement Technologies that match the 254-nanometer output spec and carry the same 365-Day Done Right Promise on installation. The aftermarket lamps run 15 to 20 percent lower on parts cost, which we disclose in writing before any work starts under Haven Standard Clause 1.
Signs Your Aprilaire Vent Sanitizing Is Failing

- Persistent musty or sour odor from registers. The UV-C lamp’s 254-nanometer output degrades below effective germicidal levels, typically after 12 to 18 months of actual runtime in Leesburg’s humid summer conditions. Algae and mold biofilm regrow on the downstream duct liner where the lamp had been keeping surfaces sterile.
- Amber or red status light that does not reset after lamp replacement. The ballast assembly, not the lamp itself, has failed. We test ballast output with a UV radiometer before quoting; a weak ballast will light a new lamp dimly and burn it out prematurely.
- Visible dark spots or staining on the duct liner near the lamp mounting location. This indicates the lamp has been non-functional long enough for microbial colonization to establish. The camera shows this clearly, and the photo record becomes part of your job documentation.
- Increased allergy symptoms after HVAC cycles, especially in spring. In Leesburg’s pollen-heavy April and May, a failed sanitizing stage means the system is recirculating allergen-loaded air through damp coil and duct surfaces without the UV-C kill step.
- Lamp appears lit but produces no measurable UV output. Mercury-vapor lamps can glow visibly from the filament heater alone while the arc tube has failed. Visual inspection is not a reliable test; we verify with a UV-C meter on every service call.
Before
AfterReplacement Cost & What’s Included
For Leesburg homeowners, Aprilaire vent sanitizing replacement runs $340 to $580 installed, with the spread driven by three factors: lamp length (9-inch vs. 16-inch), whether the ballast assembly requires replacement, and accessibility of the mounting location in the plenum or duct trunk. The parts component is itemized separately from labor on every written quote, and the full scope is agreed before any panel comes off.
Every installation includes removal and safe disposal of the spent mercury-vapor lamp under EPA universal waste rules, installation of the new lamp or ballast, UV output verification with a calibrated radiometer, and a Documented Photo Record of the lamp mounting location before and after. The 365-Day Done Right Promise applies to all work, and the Haven Standard Clause 1 written price guarantee means the number you approve is the number on the final invoice.
DIY or Call Us?

An owner can safely confirm the model number from the lamp housing label and check whether the status light pattern matches the troubleshooting guide in the Aprilaire manual. What we do not recommend is removing the lamp housing cover or attempting lamp replacement yourself. UV-C lamps operate at high voltage and contain mercury vapor; improper handling releases both an electrical shock hazard and a toxic material. We have responded to calls in Leesburg where a homeowner cracked the quartz tube attempting to force a 1950 snap-fit lamp into a 1930 threaded socket.
CleanRun is an independent service provider, not affiliated with Aprilaire. Our technicians carry the correct lamps and test equipment on every truck, and the inspection camera goes in before the quote comes out. If you are unsure whether your unit is due, call (571) 487-7204 and we will walk through the lamp label reading over the phone.
FAQs
Real lifespan in Leesburg’s climate is 12 to 18 months of actual runtime, shorter than the 24-month rating on the box because our humid summers keep the lamp working overtime and short cycling from thermostat setbacks reduces arc tube efficiency. Call (571) 487-7204 to check your lamp’s runtime hours against its install date.
No. Mercury-vapor UV-C lamps are sealed units with no serviceable internal components; once output drops below 40 microwatts per square centimeter, replacement is the only effective option. We measure this with a UV radiometer and show you the reading.
Most Aprilaire vent sanitizing replacements take 45 to 90 minutes, including lamp disposal documentation, ballast testing, and photo record delivery. Jobs requiring ballast replacement or plenum access in tight attics run toward the longer end.
We stock both OEM Aprilaire and Abatement Technologies equivalent lamps in 9-inch and 16-inch lengths, plus 24-volt ballast assemblies for the 1910, 1930, and 1950 series. We also carry Lennox, Trane, and Carrier sanitizing components for mixed-system homes. If your model is uncommon, we confirm the part and schedule for the following business day.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Leesburg at CleanRun Air Duct Cleaning Leesburg, serving Leesburg and nearby areas.




Before
After
Before
After
Before
After