Will you test my ducts for leakage at the estimate visit?

No — and we'd rather tell you that here than surprise you at the door. The leakage measurement runs when the sealing service is performed, because that's when the equipment is connected to your ductwork. At the estimate, your advisor looks over your ducts, explains how the measurement will work on your system, and gives you a straight answer on the question that comes first: whether your ducts are a good candidate for sealing at all. If they're a poor fit, you'll hear that too.

Will my job get a before-and-after report like the one on this page?

Yes. Every duct-sealing job All-Air performs is measured before and after when the service is performed, and the report is yours. It isn't an add-on or something you have to remember to request — it's how the work is done. The seal is invisible once it's in, so the report is your proof it worked.

What kind of reduction should I expect on my house?

We won't promise a number. Every duct system leaks differently — age, layout, how it was installed — so the honest answer arrives in two steps: your advisor's candidacy read at the estimate visit, and your own before-and-after report when the sealing is performed. The reports on this page show what real local homes measured; yours will show what yours did.

Is this report really from a local home?

Yes. The report on this page comes from a duct-sealing job we performed in the Lodi area, shared with the homeowner's written permission and with names, addresses, and other identifying details blacked out. We'd rather show you a handful of real reports than a wall of polished graphics.

Real Before-and-After Duct-Sealing Results from Lodi-Area Homes

You tapped “see real results” — so here it is: an actual before-and-after duct-sealing report from a home in the Lodi area. Names and addresses are blacked out to protect our customers’ privacy — but every number on it is real, recorded on real Central Valley ductwork.

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A recent duct-sealing report from a Lodi-area home — shown exactly as Aeroseal’s equipment produced it, with the customer’s name and address blacked out:

Aeroseal duct sealing report — 97% duct leakage reduction, Linden CA home (customer details redacted)

How to read a duct-sealing report in plain English

The report above comes down to four numbers, and none of them needs an engineering degree.

Leakage before, in CFM. Before sealing, the ducts are pressurized and the equipment measures how much air is escaping, in cubic feet per minute — CFM. That’s how fast the air you paid to cool was getting away.

Leakage after, in CFM. The same test, run again once the sealing is done. This is the number that proves the work — not how the ducts look, but what they measure.

The percent reduction. Before versus after, as a single percentage — the headline of the report.

The hole translation. CFM is hard to picture, so the report converts it: leakage equivalent to a hole of so-many square inches in your ductwork. That’s the line that makes it real.

A worked example

(The figures below are an illustration — the real numbers live in the report above.) Say a report reads: leakage before, 240 CFM, equivalent to a hole of about 48 square inches. That’s about half a sheet of letter paper missing from your ductwork. Leakage after: 19 CFM — about four square inches, a two-inch-square gap you could cover with a few postage stamps. That’s a 92 percent reduction: same equipment, same ducts, same day, measured twice. No adjectives required.

Why the hole picture matters: according to ENERGY STAR, a typical home loses about 20 to 30 percent of the air moving through its duct system to leaks, holes, and poor connections. In a Lodi summer, that’s cooled air spilling into a blazing-hot attic instead of reaching your rooms.

Every sealing job gets measured. Every one.

Here’s the promise, and we want you to hold us to it: every duct-sealing job All-Air performs gets this same before-and-after measurement, taken when the service is performed — and the report from that measurement is yours. That’s how you know it worked. Sealing happens inside attics and walls where you can’t watch it — so you never take the seal on faith. The proof is a number, taken before and taken after, on your ducts, in your hands.

What the estimate visit does — and doesn't

Straight talk: the estimate visit does not run this test. The measurement happens when the sealing service is performed — that’s when the equipment gets connected to your ductwork. At the estimate, your advisor looks over your ducts end to end, explains how the measurement will work on your system, and answers the question that comes before any of it: are your ducts even a good candidate for sealing? Some aren’t. If yours are a poor fit, you’ll hear that plainly — sometimes the right first conversation is a duct repair, or duct cleaning, or nothing at all. A poor fit gets a no.

Comparing bids? Ask everyone the same question.

If you’re gathering two or three quotes, good — that’s what we’d do. Put one question to every bidder, ours included: “How will I know it worked?” An answer with a measurement in it is a good answer, whoever gives it.

And our standing promise holds here like everywhere: your written proposal spells out exact upfront pricing, and nothing in it expires the moment your advisor leaves. Set it next to the other bids and take your time.

Bring the hard questions — your advisor likes them

If duct sealing landed on your list because of rooms that never match the thermostat, dust that comes back two days after you clean, or a cooling bill that feels bigger than it should, the visit is where those threads come together. Want the deeper how-it-works first? Our Aeroseal duct sealing page walks through the process itself, and our aeroseal estimate guide covers the visit itself step by step.

Questions before then? Call (209) 368-4264 and we’ll talk it through.

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Frequently Asked Questions

Will you test my ducts for leakage at the estimate visit?
No — and we’d rather tell you that here than surprise you at the door. The leakage measurement runs when the sealing service is performed, because that’s when the equipment is connected to your ductwork. At the estimate, your advisor looks over your ducts, explains how the measurement will work on your system, and gives you a straight answer on the question that comes first: whether your ducts are a good candidate for sealing at all. If they’re a poor fit, you’ll hear that too.
Will my job get a before-and-after report like the one on this page?
Yes. Every duct-sealing job All-Air performs is measured before and after when the service is performed, and the report is yours. It isn’t an add-on or something you have to remember to request — it’s how the work is done. The seal is invisible once it’s in, so the report is your proof it worked.
What kind of reduction should I expect on my house?
We won’t promise a number. Every duct system leaks differently — age, layout, how it was installed — so the honest answer arrives in two steps: your advisor’s candidacy read at the estimate visit, and your own before-and-after report when the sealing is performed. The reports on this page show what real local homes measured; yours will show what yours did.
Is this report really from a local home?
Yes. The report on this page comes from a duct-sealing job we performed in the Lodi area, with the customer’s name, address, and other identifying details blacked out to protect their privacy. We’d rather show you a real report than a wall of polished graphics.

All-Air Heating & Air Conditioning — Lodi, CA. Your Partner For Life. License #959972. Penn and Gwynn approve of anyone who asks to see the numbers.