Ductwork Services in Denton, TX
Leaky ducts waste 20-30% of your cooling and heating. Flat-rate residential duct sealing, repair, and replacement in Denton. Static pressure diagnostic $85 (waived with repair). Licensed TACLA126718E, EPA 608 Universal certified, family-owned since 2018.
How Much Does Ductwork Cost in Denton?
Ductwork in Denton starts at $85 for a static pressure diagnostic (waived with any repair). Most homes need 2-5 targeted repairs, not a full duct redesign. We're flat-rate, which means the price quoted before we start is the price you pay at the end. Frosty Club members save 10-15% on every job.
| Service | Regular Price | Frosty Club Member |
|---|---|---|
| Diagnostic / static pressure test(Waived with repair) | $85 | $72.25 |
| Duct sealing (per repair) | $350 | $297.50 |
| Full duct replacement (per run) | $700 | $595 |
| Plenum replacement | $1,200 – $1,500 | $1,020 – $1,275 |
| Basic tune-up (related upsell) | $150 | $127.50 |
Leaky Ducts Are an Indoor Air Quality Problem
Per the EPA, indoor air is 2-5x more polluted than outdoor air — and leaky ducts are one of the main causes. Every crack, loose connection, and failed tape seal pulls unfiltered attic air (dust, pollen, insulation fibers, rodent droppings) directly into your supply stream. Sealing and replacing bad runs is one of the highest-impact IAQ improvements we make.
Save More with Frosty Club
Basic ($99/yr):10% off all services | Premium ($300/yr): 15% off + $500 repair credit + 2 free tune-ups/year
Join Frosty ClubWhat Are the Most Common Ductwork Problems in Denton?
Leaky and undersized ducts are the single most-missed cause of comfort problems I see in DFW homes. Here's what we find most often on Denton diagnostic calls, and what each one typically costs to fix.
Uneven temperatures room-to-room
Classic sign of leaky supply runs or a failing zone damper. $85 diagnostic pinpoints the exact run. Fix is usually 1-3 duct repairs at $350 each.
Dusty rooms (no matter how often you clean)
Leaky returns pull unfiltered attic air straight into your supply stream. Sealing at $350 per repair stops the contamination at the source.
Climbing energy bills every summer
20-30% duct leakage means 20-30% more AC runtime. Sealing bad connections typically cuts summer bills 15-25%. 3-5 year payback.
Musty smell when the system turns on
Condensation inside flex liner leads to mold growth. You can't clean mold out of fiberglass — the only fix is replacement at $700 per run.
Rooms that never cool or heat enough
Usually undersized returns or crimped supply runs choking airflow. Manometer test during diagnostic measures exact loss. Fix varies by cause.
Allergy or asthma symptoms worse indoors
Leaky ducts pull pollen, dust, and insulation fibers into your breathing air. Duct sealing is one of the highest-impact IAQ improvements we make.
Why Do Denton Homeowners Trust Frosty's for Ductwork?
Denton has the most ductwork variety of any city we serve. Downtown Denton, the historic square, Wolflin, and Oak Gardens are full of prewar homes (1900s-30s) where central air was retrofitted decades later. The original ductwork is almost always undersized — trunk lines that belong on a 1.5-ton system trying to feed a 3-ton. Supply registers are cut into plaster walls, returns are a single 14x20 grill doing the work of two, and the flex duct in the attic is 1980s-vintage with tape that gave up years ago. I routinely measure 30-40% air leakage in these homes with a Duct Blaster test. That's why the upstairs bedrooms are always 10°F off from the living room — not a thermostat issue, not a refrigerant issue, a duct sizing and sealing issue.
UNT and TWU rental stock — the postwar ranch homes from the 1950s-70s near campus — have a different duct problem. The original rigid metal trunk is usually intact, but every branch run has been patched, replaced piecemeal with mismatched flex, or crushed where someone stored Christmas decorations on top of it in the attic. And on the rural outskirts with acreage homes, the issue is often ductwork that runs 40+ feet through an unconditioned attic with R-4 insulation in 150°F heat, losing most of its cooling capacity before it reaches the last bedroom. Robson Ranch homes, being 2000s+, generally have adequate ductwork from day one — the calls we get there are sealing jobs ($350 flat), not full replacements.
Every ductwork job in Denton includes a before-and-after static pressure reading — we measure what your blower is fighting against before we start and prove the improvement after we're done. Target on a healthy residential system is under 0.5 inches of water column; most downtown Denton homes we first visit are running 0.9-1.3 (way too high, which means the blower is working harder and failing sooner). We don't offer duct insulation as a standalone product — if ducts are that deteriorated, they need full replacement, not a band-aid. I'm Omar Jacobo, TACLA126718E-licensed, EPA 608 Universal (#2396328), 99 Google reviews at 4.9 stars. Se Habla Español. Call (469) 254-0548.
Neighborhoods we serve in Denton: Robson Ranch, Wolflin, Rayzor Ranch, Mockingbird Lane, Oak Gardens
Why Should I Trust Frosty's Credentials for Ductwork?
Because every credential is independently verifiable and directly tied to the work — Texas HVAC Contractor License TACLA126718E covers duct modification and airflow, EPA Indoor Air Quality guidance drives our sealing and replacement decisions, and U.S. DOE research documents the 20-30% energy savings that back our flat-rate pricing.
TACLA126718E
Texas HVAC Contractor License held by Mariafernanda Jacobo. Issued and regulated by the Texas Department of Licensing and Regulation.
EPA Indoor Air Quality
Per the U.S. EPA, leaky ducts are a primary contributor to poor indoor air quality. We measure, document, and fix.
DOE Energy Savings
The U.S. Department of Energy says duct losses can account for 20-30% of HVAC energy use. Sealing pays back fast.
Learn more about our credentials on our About page or visit omar-jacobo.com.
Related Services in Denton
Frosty's covers every residential HVAC need in Denton, TX — one phone line, one flat-rate pricing book, one licensed (TACLA126718E) family-owned team.
Nearby Cities We Also Serve
Same flat-rate ductworkpricing across every city we cover. If you're in a Denton-adjacent neighborhood, these pages have local details for your ZIP.
From Our Blog
Deeper context on ductwork written by Omar Jacobo (EPA 608 #2396328).
- What Is a SEER2 Rating? (And Why It Matters for Your Wallet)SEER2 ratings explained in plain English — how they affect your energy bills and what to look for when buying a new AC. Call (469) 254-0548.Read article →
- Coppell AC Maintenance: Protecting Your Two-Story HomeTwo-story Coppell home not cooling upstairs? AC maintenance tips for 2-story homes with exact costs. TACLA126718E. Call (469) 254-0548.Read article →
- How Long Does an AC System Last in Texas?How long should your AC last in Texas? 12-15 years with maintenance, less without. Learn the signs it's time to replace. Call (469) 254-0548…Read article →
What Do Denton Homeowners Ask About Ductwork?
How do I know if my ducts need replacing in Denton?
Signs: rooms that never cool or heat evenly, high summer or winter bills, visible dust at supply registers, musty smells when the system runs, or ducts visibly detached/torn in the attic. For prewar downtown Denton homes with undersized retrofit ductwork, full replacement ($700/run) and resizing is usually the right call. For newer Robson Ranch homes, duct sealing ($350) often solves the airflow issue.
How much does duct replacement cost in Denton?
Duct sealing $350 flat ($297.50 for members), duct replacement $700 per run ($595 for members), plenum replacement $1,200-$1,500. Most Denton homes have 8-14 supply runs plus returns, so a full replacement typically lands at $5,000-$10,000. Prewar homes around the square sometimes need plenum rebuilds too. We quote flat-rate before starting and include static pressure readings before and after.
My Wolflin bungalow has undersized original ductwork — can you resize it?
Yes. On historic downtown Denton homes, undersized 1980s/90s retrofit ductwork is the single most common problem I see. We run a Manual D duct sizing calculation, upsize supply runs where needed, and often replace the plenum and return drop entirely. Most of the work happens from the attic without touching finished walls. Flat-rate quote before we start.
Can you seal my existing ductwork in Denton instead of replacing it?
Sometimes — depends on the condition. If the duct material is intact but joints are leaking, sealing ($350) works well, especially in 2000s+ Robson Ranch homes. If the flex duct itself is torn, crushed, or the inner liner has separated from the outer vapor barrier — common in UNT-area rental homes — sealing won't fix it. We inspect first and give you the honest answer.
Do you insulate ductwork in Denton?
We don't offer standalone duct insulation as a product. If ducts are deteriorated enough to need insulation attention, they need full replacement — we don't band-aid. Modern R-8 insulated flex or R-6 insulated metal is built to manufacturer spec and is what we install on every replacement job. Especially important on rural Denton acreage homes with long attic runs.
Will New Ductwork Help My Older R-22 System in Robson Ranch and Wolflin?
Yes — EPA 608 Universal cert #2396328 lets me legally recover, recycle, and recharge R-22 under federal regulations. R-22 production ended in 2020 under the Clean Air Act phase-out (EPA.gov), so it now runs $200 per pound installed. A typical Robson Ranch and Wolflin R-22 leak repair totals $650-$1,000: electronic leak detection ($250) or nitrogen leak test ($500) plus recharge at $200/lb. Optional leak seal $350 — but it can void manufacturer warranties, so I only recommend it in specific cases. For systems past 12 years with major leaks, planning the transition to R-454B or R-32 is usually the better economics. Read our R-410A phase-out explainer for DFW homeowners.
Should I Update Ductwork Before Replacing My R-410A System in Robson Ranch and Wolflin?
Yes — ductwork outlives 2-3 system replacements. R-410A new-equipment production ended Jan 2025 under the AIM Act (Energy.gov), so your next replacement will use R-454B or R-32. Sizing the Robson Ranch and Wolflin ductwork correctly now sets up the new system regardless of refrigerant. EPA 608 Universal cert #2396328 covers all refrigerant work. Read our R-410A phase-out explainer for DFW homeowners.
How Do I Fix Leaky Ductwork in Denton?
Call (469) 254-0548 or request service online to book an $85 static pressure diagnostic (waived with any repair). We schedule duct diagnostics within 1-3 days and bring a manometer, bore-scope, and written report to every call. Flat-rate pricing — no surprises, no hourly charges.
Written by Omar Jacobo, EPA 608 Universal Certified Lead Technician at Frosty's HVAC LLC. Licensed TACLA126718E.
Written by
By Omar Jacobo
Texas Licensed HVAC Contractor #TACLA126718E · EPA #2396328
Co-Owner of Frosty's HVAC LLC, serving DFW since 2018. Learn more
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