Air Duct Cleaning in Old Town Lewisville, TX (75057)

Q: Is it safe to clean a galvanized metal duct system in a 1960s–70s Old Town home?

Yes — source-removal cleaning is appropriate for galvanized metal systems of any age. The negative pressure methodology is actually particularly effective on rigid metal duct because the duct walls don't flex — all the suction goes toward debris extraction rather than duct movement. The main thing we check in older galvanized systems is the condition of cloth tape seams and the presence of any asbestos-containing duct wrap — we assess this during our pre-cleaning walkthrough.

Old Town Lewisville is the city’s historic core — the neighborhoods around Main Street, Wayne Ferguson Plaza, the downtown square, and the established residential blocks east of I-35E stretching toward the original Lewisville city limits. Homes here were built primarily between the 1950s and early 1980s, and many of them are still running the original HVAC duct systems that went in during construction. Galvanized metal trunk lines. Cloth-tape sealed seams. Branch ducts that have been in place for 40–70 years. And in most cases, never professionally cleaned.

If you own one of these homes, you already know it has character. What you may not know is what 40–60 years of cedar pollen, dust mite colonies, oak pollen from LLELA, and oxidized debris looks like packed into horizontal trunk runs that gravity and airflow alone have never been able to clear. We know — because we open these systems regularly. And the before photos are always eye-opening, even for homeowners who suspected it was bad.

The Old Town Duct System — What’s Actually In There

Galvanized Metal — The Original System

The standard HVAC installation for Lewisville homes built in the 1950s through early 1980s was rectangular galvanized steel trunk lines running through crawl spaces, basement ceiling cavities, or attic spaces, with sheet metal branch ducts extending to each register. These systems were sealed at seams with cloth tape — the gray fabric-backed tape you may have noticed around your vents if you’ve ever been in your attic or crawl space.

Here’s what happens to these systems over 40–60 years: the cloth tape dries out, cracks, and loses adhesion — often completely separating at seams, which means the system is pulling conditioned air loss and unfiltered attic or crawl space air into the duct network. The galvanized metal interior oxidizes into a rough, irregular surface that holds debris far more aggressively than the smooth inner wall of modern flex duct. And because no one has ever extracted the debris, what’s in there now is the compressed residue of every cedar pollen season, every spring oak bloom, every pet and renovation and dusty day since the system was installed.

The LLELA Factor for Old Town

Old Town Lewisville sits immediately east of the Lewisville Lake Environmental Learning Area — 2,600 acres of dense hardwood and cedar forest that acts as a concentrated pollen source for the neighborhoods closest to it. Wayne Ferguson Plaza, the Main Street corridor, and the residential blocks west of I-35E are the closest Lewisville neighborhoods to LLELA. If you live in this area and your return grilles face west or northwest, you’re pulling LLELA pollen into your return system on every wind event throughout cedar season and spring pollen season.

Combined with a galvanized metal system that holds every pollen particle that enters it, Old Town homes adjacent to LLELA accumulate return duct contamination faster than almost any other Lewisville neighborhood. We see this consistently in the before photos — dense, layered debris in horizontal trunk runs that includes identifiable pollen layers from multiple seasons.

Horizontal Trunk Runs — The Low-Point Problem

Old Town’s original single-story ranch and cottage homes have horizontal metal trunk runs — the main supply and return trunks run horizontally through the attic or crawl space before branching to individual registers. In horizontal sections, debris doesn’t just coat the walls — it settles at the bottom of the trunk by gravity and compacts over time into dense layers at the lowest points of the duct run. Airflow alone doesn’t dislodge it. It just gets more compressed season after season.

This is exactly what source-removal cleaning addresses. The truck-mounted vacuum creates 12,000 CFM of negative pressure throughout the system while compressed air at 250 PSI drives through each trunk section, dislodging the compacted debris layers and carrying them into the vacuum. In Old Town homes that haven’t been cleaned in 20+ years, this process extracts material that has been in place since the 1990s or earlier.

Signs Your Old Town Lewisville Home Needs Cleaning

Cedar fever symptoms worse indoors than outside from December through February — the clearest sign of return duct accumulation. The HVAC is amplifying your indoor pollen exposure on every heating cycle.
Visible dust puffing from floor registers when the system kicks on — common in galvanized systems with dense settled debris that gets disturbed by each HVAC cycle start.
That burning-dust smell the first time you run heat in October or November — decades of accumulated debris burning off the heat exchanger on the first run of the season.
Cloth tape visible around your vents that looks dried, cracked, or separated — the system is pulling unfiltered attic or crawl space air into your duct network.
The house has never had duct cleaning in your ownership, and you don’t know when before that — if records don’t exist, assume it hasn’t been done.
You recently purchased an Old Town home — previous owners rarely have records of duct service. Assume the system needs cleaning and inspect from there.

What We Find in Old Town Systems

In Old Town Lewisville homes that haven’t been professionally cleaned, here’s what extraction consistently reveals:

Dense compacted debris at horizontal trunk low points — layered material including cedar pollen, dust mite debris, oxidized metal particles, and years of settled particulate. In homes not cleaned in 20+ years, this can be measured in pounds, not ounces.
Separated cloth tape seams drawing unfiltered air — visible during inspection, contributing to debris load and air quality issues beyond what’s already in the system.
Biological material in return ducts — dust mite colonies are present in essentially every Old Town home over 20 years without cleaning. Cedar and oak pollen in identifiable seasonal layers in older deposits.
Oxidized metal debris from duct wall degradation — fine rust particles from the aging galvanized interior, which is a breathing hazard independent of biological contamination.

Duct Cleaning Cost for Old Town Lewisville Homes

Most Old Town Lewisville homes are single-story with one HVAC system — typical range is $400–$650 depending on home size and debris density. Homes that have never been professionally cleaned sit at the higher end of the range — dense debris in galvanized systems requires more agitation time per run than a recently serviced modern system. The rare Old Town two-story with two systems runs $700–$900.

Dryer vent cleaning is a strong recommendation for Old Town homes, particularly those with attic-vented dryer systems (common in 1970s–80s construction where exterior wall penetration was impractical). Add $120–$175 for attic-vented systems on the same visit.

What Our Customers Say

“1968 Old Town home, original galvanized duct system. We suspected it was bad but the before photos were something else — dense black and gray material packed into the horizontal trunk that looked like it had been there since the 70s. Cedar fever season this year was genuinely different. First time my husband felt better inside than out in January.” — Old Town Lewisville homeowner, February 2026

“Bought an Old Town home two years ago. No duct records from the previous owners. Finally scheduled cleaning. The technician found a completely separated cloth tape seam on the main return trunk — it had been pulling attic air directly into the system for who knows how long. Fixed as part of the service.” — Old Town Lewisville homeowner, 2026

Frequently Asked Questions — Old Town Lewisville

What type of duct system do Old Town Lewisville homes have?

Most Old Town Lewisville homes built before 1985 have galvanized metal duct systems — rectangular metal trunk lines sealed with cloth tape, with metal branch ducts to each register. The cloth tape dried and cracked decades ago. The rough, oxidized interior of galvanized metal holds pollen, dust, and debris far more aggressively than modern flex duct. These systems were installed in the 1950s through early 1980s and most have never been professionally cleaned.

How much does duct cleaning cost for an Old Town Lewisville home?

Most Old Town homes are single-story with one system — $400–$650 depending on home size and debris density. Homes that have never been cleaned sit at the higher end. The galvanized metal interior and dense debris accumulation in these older systems requires more agitation time per run than a modern flex duct system, which is reflected in the pricing.

Is it safe to clean a 1960s–70s galvanized metal duct system?

Yes — source-removal cleaning is appropriate and effective on galvanized metal systems of any age. The rigid metal walls actually work in favor of the negative pressure methodology — all the suction goes toward debris extraction rather than duct movement. We assess cloth tape seam condition and check for any asbestos-containing duct wrap during our pre-cleaning walkthrough, which we do on every Old Town job before any tools come out.

Why is cedar fever worse indoors in my Old Town home than outside?

Old Town homes with galvanized metal duct systems accumulate cedar pollen more aggressively than any other duct type in Lewisville. The rough, oxidized interior surface of galvanized metal grips pollen particles that modern flex duct would not retain. If your Old Town home has never been professionally cleaned, your return ducts may contain 10–20 cedar seasons of accumulated pollen — recirculated on every heating cycle from December through February. Cleaning removes that reservoir. The improvement is measurable and often immediately noticeable in the first cedar season following cleaning.

Licensed · Insured · NADCA Source-Removal · Old Town Galvanized System Specialist · Written Quote Before Every Job · 4.9 Stars