Duct Cleaning & Sealing in Miami, FL. Three Free Quotes from Vetted Pros.

Common duct cleaning & sealing issues in Miami

• Disconnected flex ducts in 1970s Pinecrest attics after rodent activity or A/C tech traffic on rafters.
• Compressed flex runs in low-clearance Hialeah hip-roof attics, dropping CFM 25 to 40 percent below design.
• Rusted metal trunk seams in 1960s Coral Gables homes leaking conditioned air into the attic.
• In Miami specifically, a 1952 bungalow on sw 8th street in little havana with a 14 seer condenser typically loses 18 to 22 percent of cooled air to the attic before it reaches the supply register, so duct sealing and an r-30 blown attic upgrade beat a condenser swap on payback math, and that pattern shapes how duct cleaning & sealing calls get scoped and which contractors fit the work.

How we vet Duct Cleaning & Sealing pros in Miami

Our 5-step screening for Duct Cleaning & Sealing contractors serving Miami, FL. This is the bar a HVAC pro has to clear before we route any quote request to them in Miami.

1. 1

   Verify the Florida CMC license at the state source

   Pull the contractor's Florida CMC number and verify it's active and qualifier-matched at the state licensing portal. Any pro routing quotes to Miami (33125) must carry an active license; a lapsed or qualifier-mismatched license is the single most common red flag we filter at intake.

2. 2

   Pull a current Certificate of Insurance

   Ask for a COI naming you as Certificate Holder, with $1M general liability minimum. The COI must be emailed by the agent directly, not a photo of a card. We refresh COIs annually for every HVAC pro on our network serving Brickell and Downtown.

3. 3

   Read Google reviews, filter for the last 12 months

   4.5 stars with 50+ reviews is the floor we use. Filter for reviews mentioning Miami or nearby Downtown so you see the recent local pattern, not a 5-year-old reputation from elsewhere in the metro. Patterns of "didn't return calls" or "left job unfinished" across 3+ reviews predict the same outcome.

4. 4

   Confirm trade-specific certifications for Duct Cleaning & Sealing

   EPA Section 608 Universal for refrigerant, NATE Core for diagnostics. R-454B handling certifications are increasingly relevant as 2025 systems ship. A pro working Miami routes who can't name their certifications by acronym usually doesn't carry them.

5. 5

   Verify permit-pull history in Miami

   Every HVAC job over the local trigger threshold requires a permit. Miami-Dade County publishes residential permit pulls in its open-data portal; cross-reference the contractor against pulls near Vizcaya Museum & Gardens. A pro with zero permits pulled in the 33127 corridor over the last 90 days is likely skipping them, which costs you on resale and insurance claims.

The full 9-point vetting methodology lives at vetting-standards.

Pricing context for Miami

$485–$4,200

Duct cleaning $485 to $980 for typical 1,500 to 2,200 sq ft home. Aeroseal duct sealing $1,800 to $3,200. Combined cleaning plus Aeroseal package $2,400 to $4,200.