Meet the Team - Hollis Air Duct Hempstead

Meet the Hempstead Team Behind Hollis Air Duct Hempstead

We’re a small crew by design. Every technician who walks through your door in Hempstead, Uniondale, Garden City, or West Hempstead is someone we know personally, trained on our equipment, and held to the same written standard on every job. No subcontractors. No mystery crews. Just the same faces, the same trucks, and the same 365-Day Done Right Promise on every invoice. Roy Castellanos has kept it that way since 2004.

Call (516) 559-4917

Our People

Marcus T., Lead Technician

Marcus has run lead on air duct cleaning jobs across Nassau County for 14 years, the last 9 of them with Hollis in Hempstead. He’s certified on Rotobrush rotary brush systems and Nikro negative-air machines, which means he’s the guy who makes sure the suction side actually pulls what the brush side loosens. Before that, he worked commercial HVAC maintenance in Queens, so he’s seen ductwork in buildings most people only drive past. Marcus is the one who will walk you through your before-and-after photos on his tablet and point out the specific vent he spent the most time on. He lives in Baldwin and coaches his daughter’s travel soccer team on weekends.

Elena R., Senior Installer, Duct Sealing

Elena handles the duct sealing work, which takes a different kind of patience than cleaning. She’s spent 11 years sealing duct runs with mastic, and she knows where Hempstead homes leak most: seams in unfinished basements and returns that were never properly taped when the house went up. She can find a leak by feel before the pressure test confirms it. Elena trained on Abatement Technologies equipment and has a method for keeping the work area clean that Roy has turned into part of The Garrison Code. She’s originally from Uniondale, and she’s the reason our trucks carry extra drop cloths.

Denise W., Service Coordinator

When you call (516) 559-4917, you’ll likely talk to Denise. She’s been answering the phones for Hollis in Hempstead for 7 years, and she keeps the schedule running without making anyone feel rushed. Her job is to get the written price to you before we schedule anything, which she does after asking about your home’s square footage, number of returns, and whether you have pets or accessibility concerns. Denise lives in Hempstead and knows the neighborhood schedules well enough to route our trucks around school pickup traffic. She’s the one who confirms your window the night before.

Kevin M., Apprentice Technician

Kevin joined the crew in 2024 after completing his HVAC fundamentals training. He works under Marcus and Elena, learning the negative-air method the right way instead of picking up bad habits from a video. His day starts with truck checks: hoses, filters, brush heads, and camera lenses. He’s the second set of eyes on every before-and-after photo and the person double-checking that vents are reseated before we leave. Kevin grew up in West Hempstead and still gets razzed for rooting for the Jets. He’s not on a job alone yet, which is exactly how it should be.

One Standard, Every Job

Every Hollis location operates under The Garrison Code, which is less of a mission statement and more of a checklist that costs us jobs when we skip it. The crew arrives inside the quoted window. The price is in writing before anything gets touched, and that number does not move when the technician is standing in your basement. The work gets completed by the book: proper containment, correct negative-air setup, every vent cleaned and reseated, every register wiped down. Before we leave, the site gets swept and the before-and-after photos get reviewed with you. If something fails within a year, the 365-Day Done Right Promise brings us back at no charge. Roy Castellanos signs off on every job report that leaves the Hempstead office, and he reads the notes on every single one.

Why This Matters for Your Hempstead Home

Ductwork in Hempstead homes deals with a specific set of conditions. Older houses near the train station often have original galvanized ducts with decades of dust, pet hair, and the occasional surprise from a past renovation. Homes built in the 1960s and 70s across North Hempstead frequently have returns that were undersized or never properly sealed. Our crew has seen every variation, and we explain what we find in plain English: what came out, where it was, what we sealed, and what you should expect in the next 12 months. The tools we use, like Rotobrush rotary brush systems and Nikro negative-air machines, matter less than the people running them. Which is why we keep the crew small, trained, and local.

Written by Roy Castellanos, Owner at Hollis Air Duct Hempstead, serving Hempstead since 2004.