Horizon Air Conditioning – Local HVAC Experts Since 1985
Duct Sealing & Repair: Stop Wasting Cooled Air in Mohave County
Hot rooms, dusty returns, and an AC that never seems to shut off? In desert homes with long attic runs, leaky ducts are a top reason comfort suffers and bills climb. In many houses, 20–30% of the air moving through the duct system escapes through holes and loose connections—air you already paid to cool. Below we show how professional duct sealing and repair fixes the root cause for Mohave County homes.
Why ducts matter in our climate
- Attic temps can exceed 130°F—leaks here waste the most cooling
- Windblown dust gets pulled into return leaks, affecting IAQ
- Long, kinked flex runs starve rooms and overwork equipment
Symptoms & DIY checks before we visit
Comfort red flags
- Rooms that never reach setpoint
- Visible gaps at boots or registers
- High bills even after tune-ups
- Dust puffs when the system starts
Quick DIY checks
- Look for loose connections at the air handler plenum
- Check for crushed/kinked flex runs in the attic
- Shine a light at boots—daylight or gaps indicate leaks
- Replace/upgrade filters to reduce static pressure
Next step: We’ll test leakage and fix the root cause.
When to call us
If you see torn duct wrap, missing mastic, or disconnected boots, it’s time for a professional repair and seal.
Schedule your assessment or call (928) 758-3311.
What happens during a professional duct sealing
- Test & inspect: We use a duct blaster/pressure test to measure leakage and visually inspect plenums, takeoffs, boots, and returns.
- Seal the leaks: UL 181–listed mastic and foil tape at seams and joints (not cloth “duct tape”). Gaps > 1/8″ bridged with mesh then sealed.
- Fix the layout: Correct crushed or over-long flex runs; add hangers and proper connections for airflow.
- Insulate smartly: In attics/garages, repair/add duct wrap so supply runs stay cool.
- Re-test & verify: You’ll see measured leakage reduction before/after.
Costs, savings & local rebates
| Home Size | Starting Leakage | Typical Scope | Project Range* | Est. Savings** |
|---|---|---|---|---|
| 1,400–1,800 sq ft | 25–35% | Seal plenums, boots, flex corrections | $700–$1,200 | 15–25% cooling cost |
| 1,800–2,400 sq ft | 25–40% | As above + return add/resize | $1,200–$1,800 | 20–30% cooling cost |
| 2,400–3,000 sq ft | 30–45% | Extensive sealing + reroute sections | $1,800–$2,800 | 20–35% cooling cost |
*Final price after testing and scope. **Savings depend on attic temps, run lengths, and AC efficiency.
Utility rebates
Programs like UniSource Energy Services have offered duct sealing incentives for leakage reduction when completed by participating contractors.
We’ll check your address for current eligibility and handle paperwork.
Best pairings
- Seal before AC replacement to right-size the new unit
- Combine with AC repair to cut runtime and noise
- Add filtration/IAQ upgrades once leakage is controlled
Timeline
- Most homes finished same day
- Larger scopes: 1–2 days
- Before/after test report included
FAQ
Is mastic better than “duct tape”? Yes—mastic and UL-listed foil tapes last far longer than cloth-backed tape, which tends to dry out and fail in hot attics.
Do I need duct insulation too? If supply runs are in unconditioned spaces, repairing or adding wrap after sealing helps keep air at the right temperature.
How do you verify improvement? We test before and after and document measured leakage reduction.
Ready to stop wasting cooled air?
Schedule your professional duct sealing assessment today.
Call (928) 758-3311 Schedule OnlineHorizon Air LLC
Based in Fort Mohave • Serving Bullhead City, Laughlin, Mohave Valley, Needles, and surrounding communities
License #ROC 344248 • Bonded • Insured
CR-39 Air Conditioning and Refrigeration Specialists
Your comfort is our commitment.
