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.
Guardsman Air Duct Cleaning in Hempstead: What to Know First
We’re an independent Guardsman air duct cleaning provider in Hempstead, NY – not a Guardsman dealer or authorized service center. When a Guardman filtration system sits in a home with dirty ducts, the filter does more work and clogs faster, especially with the pollen and humidity Hempstead gets near the lake. Our answer is a full-system duct cleaning followed by a written report on what we found, and the price is fixed in writing before we touch a single vent. We don’t use per-vent pricing games, and we don’t pad the bill once the truck is in your driveway.
This page is for Hempstead homeowners who run a Guardsman filter, UV purifier, or whole-home media cabinet and need to know what it takes to clean the ductwork the right way. If you’re dealing with dusty vents, rooms that never hold temperature, or a filter that’s dark well before its normal change date, call us at (516) 559-4917. We’ll tell you straight what a cleaning costs and whether your system needs anything beyond it.
Key takeaways: Guardsman equipment works best when the ducts upstream are clean; we clean ducts first, then confirm airflow at the return and supply; every quote is written and fixed; every job carries a 365-day guarantee in writing.
How Guardsman Products Fail – and How We Fix Them
Guardsman builds filtration and air quality components, not the ducts themselves. But failures don’t happen in a vacuum – they happen inside a system. Here’s what we see on Guardsman jobs in Hempstead homes:
- Plugged Guardsman media filters on undersized return drops. Older Hempstead homes, particularly the colonials and cape styles near Hempstead Turnpike, often have a single undersized return. When a Guardsman high-MERV media cabinet goes in, the added resistance pulls dust through gaps in the return chase. The filter looks like a gray brick within six weeks. We clean the full return drop, seal obvious leaks, and check static pressure so the new filter doesn’t die early.
- Coil-shed dust landing on Guardsman UV lamps. We see UV lamp systems, including Guardsman-branded ones, coated with a film from dirty supply ducts. The lamp still glows, but the output drops hard. Cleaning the supply side restores the lamp’s line of sight, and we wipe the lamp housing during the same visit.
- Bypass-style duct returns pulling from dirty crawlspaces. Homes around Hempstead Lake State Park have humidity in crawlspaces and basements. If a return duct has a loose joint or a rusted seam, the system pulls damp particulate across a Guardsman filter. We find the leak with a video inspection and seal it with duct mastic, not tape.
- Guardsman electronic air cleaner cells loaded with fine dust. After a full cleaning, a washable electronic cell should go 2-4 weeks between readings in our experience. When we get called back early, it’s usually a missed branch duct feeding the system. We trace it, clean it, and document it on the video report.
- Dirty blower wheels behind Guardsman cabinets. A filthy blower throws dust onto a clean filter and makes a Guardsman system look like it failed. We clean the blower wheel and the housing when the schedule allows, because it’s the same dust the filter has been catching since day one.
Styles & brands we work with




Our Guardsman Air Duct Cleaning Process
Here’s how a typical Guardsman-related job goes when you call Hollis Air Duct Hempstead:
- 1
Written quote before we start. We walk the system with you, count the drops, check the filter housing, and give you a price in writing. It does not change at the door.
- 2
Negative-air setup. We attach a Nikro or Abatement Technologies negative-air machine to the main trunk and cut filter media to seal the remaining openings. This creates vacuum so debris doesn’t vent into your living room.
- 3
Rotary brush cleaning of supply and return branches. A Rotobrush rotary brush system runs through each branch, agitating the walls and pushing debris toward the vacuum. We do the supply side, then the return side.
- 4
Guardsman component check. We inspect the Guardsman filter, media cabinet, UV lamp, or electronic cell while the ductwork is open. We tell you what’s worth replacing and what still has life. That’s the straight answer part.
- 5
Video inspection and final walkthrough. We show you the before-and-after video from inside your ducts. You see the work, not just hear about it.
- 6
365-day promise in writing. If the work fails within a year, we come back and make it right. No charge, no renegotiation.
See the difference
Before
After
Before
After
Before
AfterWhat Guardsman Air Duct Cleaning Costs in Hempstead
We price by the system, not by the vent. That’s the one flat price philosophy we’ve run on since 2004. Here are the ranges you’ll see in Hempstead:
- Full residential duct cleaning (single system, up to 2,000 sq ft): $390 – $690
- Larger homes or dual-zone systems (2,500 – 4,000 sq ft): $680 – $1,050
- Commercial duct cleaning in Hempstead retail or office space: $900 – $2,400 depending on linear footage and access
- Supply or return side only: $250 – $450
- Guardsman filter inspection and media replacement (during cleaning): filter cost only, no added labor when we’re already on site
What moves the price: number of drops, access difficulty, whether we’re cleaning the blower, and whether previous cleaning left debris packed in the trunk. We don’t charge extra for the video inspection – it’s part of the job. Call (516) 559-4917 for an exact written quote. Estimates are free, and nobody will pressure you while they’re at your kitchen table.
Why Hempstead Homeowners Call Hollis Air Duct Hempstead for Guardsman Work
We’re not the cheapest ad in the back of the Pennysaver, and we’re fine with that. Roy Castellanos and the crew have worked duct systems in homes near Hempstead Lake State Park and along Front Street long enough to know the older housing stock – small returns, tight chases, original sheet metal that’s been through decades of New York summers. He grew up in East Los Angeles and learned the trade at Los Angeles Trade-Technical College before spending the better part of two decades on HVAC and duct systems across the New York metro. That’s the kind of background that shows up when the job goes sideways and someone has to make a call.
Every job gets a written price, a written guarantee, and a crew that shows up uniformed and background-checked. We answer the phone 24/7 with a live person. And if you run Lennox, Trane, or Carrier equipment alongside a Guardsman filter, we service those too – the duct cleaning is the same discipline, the same standard across brands. The Garrison Code is simple: arrive inside the window, price in writing, finish by the book, leave the site clean. Clean ducts, straight answers – that’s the whole job.
FAQs
No. Duct cleaning does not alter the Guardsman filter, cabinet, or lamp assembly. We use non-abrasive rotary brushes and negative-air extraction, which are the standard methods specified for cleaning ductwork attached to any residential HVAC system. If you have a Guardsman product registered under warranty, we leave the manufacturer components intact and flag anything we see that might affect coverage.
Most Hempstead homes with a Guardsman media filter need a full cleaning every 4-6 years, assuming the filter and blower are maintained. Homes with pets, smokers, or older ductwork near the lake often tighten that to every 3-4 years. If you’re changing a Guardsman media filter every four weeks instead of every three to four months, that’s a signal to call us – the ducts upstream are feeding it.
No. A Guardsman media filter that loads black that fast is usually pulling from a dirty return, a leaky return chase, or a duct system with heavy particulate. We find the cause with a video inspection and clean the side that’s feeding the problem. In homes around Hempstead’s older neighborhoods, we often find returns that were never sealed at the floor joists, pulling crawlspace dust straight into the cabinet. Call (516) 559-4917 if this is happening – the fix is usually less expensive than a year of burned-through filters.
We install genuine Guardsman media when it’s available and appropriately sized, and we’ll tell you if an aftermarket media is a better value for your specific cabinet – sometimes it is. The decision is always written down before the work starts, and we never change a filter without showing you the old one and the price of the new one first.
We schedule duct cleaning for the next available window, not the same hour. Duct cleaning is a scheduled job – we bring commercial-grade negative-air machines and rotary brush equipment, and we don’t cut corners to squeeze it into an hour. When you call (516) 559-4917, we’ll give you a straight answer on when we can be there and what the job will cost. That’s the whole arrangement.
Written by Roy Castellanos, Owner, Hollis Air Duct Hempstead at Hollis Air Duct Hempstead, serving Hempstead and nearby areas.