Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Honeywell Vent Sanitizing: The Alpharetta Owner’s Guide
We stock and install Honeywell-compatible UV vent sanitizing systems across Alpharetta, with most replacements running $425 – $780 installed depending on lamp wattage and whether your existing mounting plate needs retrofitting. Most Alpharetta homeowners call us because the UV lamp has burned out silently – the system keeps humming but stops doing its job – or a ballast failure has tripped a circuit. Either way, we carry Honeywell-spec replacement lamps and ballasts on the truck, and a swap usually runs under two hours.
Hollis Air Duct Alpharetta is an independent service provider. We’re not affiliated with Honeywell, but we’ve been working with their UV air treatment equipment since before most Alpharetta HVAC companies had a parts shelf for it.
Key takeaways:
- Installed replacement in Alpharetta typically runs $425 – $780, written down before we start.
- UV lamps lose effectiveness after 9 – 12 months of continuous run time, even when they still glow.
- We stock Honeywell UV100 and UV2400 series lamps and ballasts on the truck.
- Every replacement is covered by the 365-Day Done Right Promise, in writing.
Which Honeywell Models This Applies To
The two Honeywell UV systems we see most often in Alpharetta homes are the UV100 series and the UV2400 series. The UV100 is the workhorse single-lamp unit you’ll typically find mounted in the return plenum or above the coil on older two-story homes near Windward Parkway. The UV2400 is the dual-lamp version, usually installed on larger systems or where the homeowner wanted coverage on both the coil and the return air stream.
The model number lives on a metal or plastic label on the lamp housing, not the power cord. If the label is faded – common in Georgia attics where heat and humidity eat adhesive – you can identify the unit by lamp length: UV100 lamps run 17 inches, UV2400 lamps run 34 inches. Write that measurement down before you call anyone; it saves a second trip.
On OEM versus aftermarket: Honeywell OEM lamps are built to spec and carry the manufacturer’s rated output curve. There are aftermarket lamps available for less, and some are fine. The issue is that a UV lamp’s output degrades on a curve, and a lamp that is $30 cheaper but loses 30% of its intensity in six months means you’re paying for light that isn’t sanitizing anything. For a part that runs 24/7, we install OEM Honeywell lamps unless the customer specifically requests otherwise, and we’ll tell you the price difference before we touch anything.
Styles & brands we work with




Signs Your Honeywell Vent Sanitizing Is Failing
- The lamp is out or flickering. UV lamps fail on a schedule, not all at once. If it’s flickering, the ballast is struggling. If it’s out entirely, the lamp has reached end of life or the ballast has died. Either way, that portion of your system is doing nothing.
- The ballast is buzzing or warm to the touch. A failing ballast makes a low electrical hum and runs hotter than normal. This is the component most likely to fail before the lamp itself in Alpharetta’s summer attic heat, which shortens ballast life compared to cooler climates.
- You smell a faint electrical odor near the air handler. Don’t ignore this. Shut the unit off at the disconnect and call us. Ballast failures can generate heat, and heat near a return air stream is not something to wait on.
- No visible blue glow through the sight glass. If your Honeywell unit has a view port, and you see no blue light while the system is running, the lamp has failed or lost connection. This is the easiest field check a homeowner can make.
- Musty air returning despite filter changes. A healthy UV system suppresses microbial growth on the coil and in the drain pan. When the lamp is dead, you’ll often notice the difference within six to eight weeks – the damp coil smell comes back even though you haven’t changed anything else.
Replacement Cost & What’s Included
In Alpharetta, plan on $425 – $780 for a Honeywell UV lamp and ballast replacement, installed. The range depends on three things: whether you need one lamp or two, whether the ballast is integrated or separate, and whether we need to fabricate a new mounting plate because the original rusted out. Georgia crawlspaces and attics are hard on mounting hardware.
Here’s what that number looks like on paper:
- Single UV100 lamp replacement: $425 – $495 installed.
- UV100 lamp plus ballast: $545 – $640 installed.
- UV2400 dual lamp replacement: $610 – $710 installed.
- UV2400 lamps plus ballast: $690 – $780 installed.
The price is written down before any work begins, and it does not move at the door. Every replacement includes verification that the lamp is drawing correct current, a check of the mounting integrity, and the 365-Day Done Right Promise – if the part or the work fails within a year, we come back and make it right at no charge.
See the difference
Before
After
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After
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AfterDIY or Call Us?
There’s one homeowner check we recommend: look at the sight glass. If there’s no blue glow while the air handler is running, the lamp or ballast has failed. That’s the end of the DIY road. UV sanitizing systems operate on 120V inside your air handler, and a ballast that is failing can hold a charge even after the unit is switched off. Roy Castellanos, our owner, will tell you the same thing he’s told hundreds of Alpharetta homeowners: this is a part where guessing costs more than the service call.
Beyond the electrical risk, there’s a compatibility piece that trips up DIYers every month. Honeywell UV lamps seat into a specific socket configuration, and aftermarket lamps with the wrong pin spacing will not seat properly, which means no light, which means you paid for a part and still have no sanitizing. If you’ve already bought a lamp and it doesn’t fit, call us at (762) 769-7145 – we’ll match the right part to your model and install it correctly the first time.
FAQs
A Honeywell UV lamp is rated for roughly 9,000 – 12,000 hours of continuous run time, which translates to 12 – 16 months. In Alpharetta’s climate, where air handlers run longer cooling seasons than the national average, most lamps need replacement every 12 months to maintain effective output. The lamp will often still glow at month 14 or 15, but its UV intensity has dropped below the level that kills mold and bacteria on the coil. Call us at (762) 769-7145 for a replacement quote.
No. Ballasts are sealed units, and when they fail, the proper repair is replacement. The good news is that a ballast replacement in Alpharetta typically runs $120 – $180 for the part, and we stock Honeywell-compatible ballasts for the UV100 and UV2400 series on the truck. Get the exact price before we start – that’s how we work.
Most single-lamp Honeywell replacements take under two hours from arrival to cleanup. That includes verifying the existing wiring, seating the new lamp, checking current draw, and confirming proper operation through the sight glass. Dual-lamp UV2400 systems run closer to two and a half hours.
We stock Honeywell UV100 and UV2400 series lamps, ballasts, and mounting hardware on our service trucks. If you have a Honeywell unit outside those two series, we can source the correct part through our supply network – usually within two business days, and we’ll tell you the expected lead time before you commit to anything. We also carry vent sanitizing components compatible with Lennox, Trane, and Carrier systems.
Call Hollis Air Duct Alpharetta
If your Honeywell vent sanitizing system has a dead lamp, a buzzing ballast, or a sight glass that hasn’t shown blue in weeks, call us at (762) 769-7145. We’ll give you an honest price in writing, show up uniformed and background-checked, and stand behind the work for a full year. Clean ducts don’t announce themselves – you just breathe better and the filter stays cleaner longer.
Written by Roy Castellanos, Owner, Hollis Air Duct Alpharetta at Hollis Air Duct Alpharetta, serving Alpharetta and nearby areas.