How much of my cooled air is leaking into the attic?
In typical duct systems, 20–30% of conditioned air never reaches a room — it escapes through leaks, holes, and failed connections along the way.
The share of conditioned air typical homes lose to duct leaks — air you paid to cool, dumped into an Orlando attic that hits 130°F on a July afternoon.
Duct leakage is the silent tax on every Orlando cooling bill. Florida homes almost always run ducts through the attic — the hottest possible path — so every leak is a double hit: you lose the cold air, and the negative pressure pulls hot, humid, dusty attic air back into the system. The symptoms are familiar: one bedroom that never cools, a system that runs constantly, bills that creep up every year, and a house that feels sticky even when the thermostat is satisfied. If that sounds like your house, start with why is my AC not cooling? — ducts are on that list for a reason.
Is duct cleaning worth it — or is it a scam?
The $99 duct cleaning deal is one of the most reliable bait-and-switch plays in home services. Most Florida flex duct doesn't benefit from cleaning at all.
Here's how the play works: a $99 coupon gets a crew in your door, then "we found mold" turns it into a $1,500–$3,000 remediation pitch — sometimes supported by photos that aren't even from your house. The EPA's own guidance says duct cleaning has never been shown to prevent health problems, and dirty duct interiors in Florida usually mean the duct is leaking, pulling in attic dust — a problem cleaning doesn't touch. We've covered these operations on our video channel. If your air itself is the concern, the honest fixes live on our indoor air quality page.
Seal, repair, or replace — which does my system need?
Sealing for leaky joints on sound ducts, repair for individual damaged runs, replacement for systems that are old, undersized, or deteriorating inside.
| Service | When It's Right | What We Do | Typical Cost |
|---|---|---|---|
| Sealing | Sound ducts, leaky joints & boots | Mastic seal every connection (not tape) | $600–$1,800 |
| Repair | Crushed, torn, or disconnected runs | Replace damaged sections, reseal, re-strap | $350–$1,500 |
| Replacement | 20+ yrs old, undersized, liner failing | New designed layout, sized to the system | $3,500–$8,000+ |
Every quote starts with a camera inspection of your actual attic — you watch the footage with us. Full pricing detail: duct repair cost guide. Replacing your AC soon? Fix ducts first or simultaneously — a new system on leaky ducts is buying efficiency and throwing part of it away. See AC installation and heat pump installation.
Do leaky ducts make my house humid?
Yes — return-side leaks suck hot, moist attic air into your system, adding humidity your AC then has to fight. Sealing often improves comfort more than it improves the bill.
A leak on the return side of your ductwork puts your air handler under negative pressure with a straw into the attic — every runtime hour pulls in humid, insulation-laden air. That's a hidden contributor to the sticky-house problem, to musty smells, and to mold-friendly indoor humidity. The full picture of Florida moisture management is at Florida humidity and mold.
How do I know you actually fixed it?
Before-and-after camera footage, temperature readings at your worst register, and a walkthrough of every sealed connection. Evidence, not assurances.
Duct work happens in a place you'll never look, which makes it a magnet for shortcuts. Our standard is the same one we use on every repair: document it on camera. You get footage of the problems, footage of the completed work, and measured supply temperatures at the registers that were struggling. Combine the inspection with an $89 tune-up and we'll assess ducts and equipment in the same visit. We serve Waterford Lakes, Winter Park, and every zone in between.
Ductwork questions, answered
How much cooled air do leaky ducts actually waste?
20–30% in typical homes — lost to leaks and bad connections before it reaches a room, and in Orlando that means dumping it into a 130°F attic.
Are $99 duct cleaning deals a scam?
Usually. The coupon is bait for a "we found mold" upsell, and most Florida flex duct doesn't benefit from cleaning anyway — interior dirt means a leak, and sealing is the real fix.
Should I seal, repair, or replace my ducts?
Sealing for leaky joints on sound ducts, repair for damaged runs, replacement for old or undersized systems. A camera inspection — footage you watch — decides it. Prices: duct repair cost.
Will sealing my ducts lower my electric bill?
If they leak significantly, yes — plus better airflow to weak rooms and lower indoor humidity, since attic air stops infiltrating the return side.
See What's Really in Your Attic — On Camera
$89 duct inspection applied to the work. Footage, not fear tactics. 5.0 stars — 91 reviews.
Call (407) 465-7777Smart Home Air & Heat — 10226 Curry Ford Rd, Orlando, FL 32825 — office@smarthomeairheat.com