What Does Duct Sealing Cost in Phoenix?
Duct sealing is quoted flat-rate after a free in-home inspection — scope varies more than any other HVAC project, so honest pricing starts with a measurement, not a phone estimate. A few accessible mastic repairs is a very different job from whole-system Aeroseal sealing in a tight attic. What's consistent: the inspection is free, the quote is written before work begins, and the results are measured before-and-after.
Why Phoenix ducts leak — and why it costs you twice
Valley attics exceed 130° all summer. Decades of that heat make duct mastic brittle and flex-duct jackets crack, so supply leaks dump your cooled air into the attic while return leaks pull 130° dusty air into the system. You pay to cool air that never arrives, then pay again as the system runs longer to compensate.
Sealing vs. Aeroseal vs. replacement
- Mechanical sealing — accessible leaks sealed with mastic and collars; the value move when runs are sound but leaky.
- Aeroseal — aerosolized sealant closes leaks from the inside, including ones no one can reach; measured before-and-after so you see the recovered airflow in numbers.
- Replacement — wins when ducts are crushed, undersized, or degraded past saving; sized with a Manual J calculation alongside the equipment.
The SRP duct rebate (verified July 2026)
SRP's duct repair rebate covers 75% of costs up to $400 for single-family detached homes in its territory. APS has no active duct rebate. We confirm your utility before the quote so the rebate line is real.
Build Your Estimate
Duct condition is also a cost driver on every replacement quote — the calculator shows how it moves complete-system pricing.
See your project's real range and monthly payment
1. Choose what to take care of
Like-for-like swap: $8,000–$12,000 · Lasts ~10–18 yrs · est. ~$60/mo lower bills
What can change your price
- New install vs. replacement
- System size (tonnage)
- Efficiency tier
- Ductwork (new or repair)
- Gas line & venting
- Electrical upgrades
- Duct sealing
- Zoning & thermostat
- Refrigerant line set
- Permits & inspection
Most Phoenix Valley homeowners invest between $8,000 and $22,000 for a complete system — about $86–$236 per month based on that full range at 9.99% APR for 180 months, on approved credit. Parts warranties on new systems typically run 10 years, and well-maintained systems here in the Valley regularly reach 15–18.
2. Pick a financing plan
Financing from 9.99% APR fixed · 0% for 60 months · no payments year one — on approved credit.
180 months · fixed 9.99% APR
One fixed rate over 15 years for the lowest monthly payment of our plans — pay it off early anytime.
- Fixed 9.99% APR
- Lowest monthly payment
- No prepayment penalties
Payments based on a dealer factor of $10.74 per $1,000 financed.
No payments year one
Pay nothing for the first year — no interest, no payments. After the initial 12-month term, the balance rolls into a fixed 9.99% APR loan for 120 months.
- No interest for 12 months
- No payments for 12 months
- Then fixed 9.99% APR · 120 months
- Know your after-year-one payment upfront
Post-deferral payments based on a dealer factor of $13.21 per $1,000 financed after the 12-month deferral period.
60 months · equal pay · 0% interest
Spread your investment over 5 years with equal monthly payments and zero interest — from $106/mo on a $6,360 project.
- 0% interest for 60 months
- Equal fixed payments
- Budget-friendly comfort
Payments based on equal division of the project total over 60 months at 0% interest — exact payment per your financing agreement.
Estimated monthly payment
$86–$129/mo
About $3–$4/day — a cup of coffee.
- Project total (1 project)
- $8,000–$12,000
- Est. monthly bill savingsestimated vs. a 10+ year old system — varies by home and usage
- − $60/mo
- Effective net monthly
- $26–$69/mo
Estimates only, with approved credit. Exact terms confirmed by our financing partners at your quote. Payments based on a dealer factor of $10.74 per $1,000 financed. Full financing details.
Straight Answers
Cost Guide FAQs
Cost questions, answered honestly
Want the exact number for your home?
Free in-home, flat-rate quote — and a free second opinion if someone else quoted you first.