Air Duct
Sealing

Leaky ducts waste energy, create uneven temperatures, and force your HVAC system to work harder. Our licensed technicians locate air leaks, seal ductwork properly, and help restore comfort and efficiency throughout your home.

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Air Duct Sealing in Big Rapids, MI

Stop Losing Comfort Through Hidden Air Leaks

Most homeowners never realize how much heated or cooled air escapes through damaged or poorly connected ductwork. Even a small leak can reduce comfort, increase utility costs, and put unnecessary strain on your HVAC system.

Stratz Heating & Cooling has been helping homeowners improve indoor comfort and HVAC performance across Mecosta County since 1970.

Our technicians inspect your duct system, identify leakage points, and professionally seal problem areas to improve airflow and system performance.

No unnecessary upgrades. No pressure. Just honest recommendations and professional workmanship.

Know the Warning Signs

Is Your Duct System Telling You
Something Is Wrong?

These are common signs your home may benefit from professional air duct sealing.

01

Hot and Cold Rooms

If some rooms feel comfortable while others stay too warm or too cold, leaking ducts may be preventing balanced airflow.

02

High Energy Bills

Unexpected increases in heating or cooling costs often happen when conditioned air escapes before reaching living spaces.

03

Excessive Dust

Leaky ducts can pull dust, attic particles, and contaminants into your HVAC system and distribute them throughout the house.

04

Weak Airflow

If vents produce weak airflow despite your HVAC system running normally, duct leakage may be reducing performance.

05

HVAC Running Constantly

When your heating or cooling system works longer than usual, leaking ductwork may be forcing it to compensate.

Uneven Comfort Throughout the Home

Rooms farther from the HVAC system often experience noticeable temperature differences when ducts leak.

How It Works

Our Air Duct Sealing
Process — Step by Step

You Call

Call our 24/7 line. A real person answers — no automated menus, no voicemail.

We Dispatch

A licensed technician is dispatched — often within 1–2 hours for emergencies in our service area.

We Diagnose

Full system diagnostic — we find the root cause, not just the symptom, using professional tools.

You Approve

We give you an upfront, itemized quote. No work begins until you’ve approved the price in writing.

Sealed & Comfortable

We complete the sealing process, verify airflow improvements, and review results with you.

Real Reviews

What Big Rapids
Homeowners Say

Stratz Heating & Cooling, Inc. place picture
4.9
Based on 757 reviews
powered by Google
Melissa DeNiel profile picture
Melissa DeNiel
1 week ago
My furnace went out on a Sunday morning. Nick was great. He got here within a few hours. Found the problem and was able to fix it within an hour.! STRATZ Has always been very, very helpful!
Shelly Culbert profile picture
Shelly Culbert
1 week ago
Caleb did a great repair for our air conditioner. He communicated the problem well and was efficient.
vicki olson profile picture
vicki olson
2 weeks ago
My technician (Reese) did an excellent job finding the source of the issue and had it resolved it quickly. Reese is very knowledgeable!
Robert Teeter profile picture
Robert Teeter
2 weeks ago
Stratz designed and installed our original heating & AC system in our new house 17 years ago. It is a high-efficiency 3-zone system, and we have been extremely pleased with it. In addition, we have used Stratz every year for our annual inspections and check-ups, as well as the occasional repair and replacement. All of Stratz's technicians are very knowledgeable and experienced, and have always been very friendly and courteous. I wholeheartedly recommend Stratz without any reservations to anyone looking for a high quality professional heating and AC service.
Jeff Wildey profile picture
Jeff Wildey
4 months ago
Stratz is the BEST!! Fixed my furnace in no time flat. Reece was a professional to the core and had us warm on a cold winter day in no time. Excellent job!!! Love these guys!
Carol Telford profile picture
Carol Telford
4 months ago
Caleb was my technician. He replaced my blower on my furnance. He was kind enough to come back and explain the blower furnance noise after installation.

Not knowing other prices, i have nohing to compare the expense to.

I surely appreciated them, for it was a very cold night.
Nancy Padilla profile picture
Nancy Padilla
4 months ago
We had a leak in our on demand water heater at our cottage. We found it on our arrival after being gone for several weeks. Called them, Nick came within a half hour. Got it evaluated, turned hot water off and put a plan for replacement - this was a Friday afternoon. Got a call on Monday with our options, Tuesday afternoon Chad and his assistants were there. The install was great. Very professional, left everything clean and neat, answered all my husbands questions. Awesome job to all of you. Highly recommend!
Olya Duzey profile picture
Olya Duzey
6 months ago
We were very pleased with the responsiveness and quality of the work of the team at Stratz.
Reece was available to help with a furnace that decided to misbehave over the Christmas holidays. He let us know in advance of his arrival, diagnosed and fixed the problem quickly, and was courteous and professional throughout.
We had a similar good experience with Jacob in November on another problem. He was also thoroughly professional, courteous and helpful.
Highly recommend both technicians and the team at Stratz.
Gabrielle Bays profile picture
Gabrielle Bays
7 months ago
Caleb was awesome. He came the same day I called and although he had already put in a full day he stayed as long as it took. Not only did he fix a problem that has been ongoing for several years he was attentive, professional and very personable. My exceptionally shy grandson took to him; repeatedly watching and talking to him, not usually done with ANY stranger. Caleb is special. I know who to call now and will look into maintenance plans. Thanks for all you do.
How do I know if my air ducts are leaking?

Common signs include uneven temperatures, high energy bills, excessive dust, weak airflow, and HVAC systems that run longer than normal.

Sealing leaks can improve efficiency and reduce wasted conditioned air, which may lower monthly utility costs.
Most residential duct sealing projects are completed within a single visit depending on system size and accessibility.
Yes. Proper sealing helps reduce dust and contaminants entering your airflow system.
Not always. Many duct systems can be restored through professional sealing without full replacement.

Common Questions

Air Duct Sealing
FAQ

Whether your Air Duct won’t turn on, is short cycling, making strange noises, or running but not heating, our technicians carry the diagnostic tools and parts to get most furnaces running in a single visit. We work on every major brand — gas, oil, and electric — and we never recommend a replacement unless it’s genuinely your best option. No upselling. No unnecessary parts. Just honest diagnosis, quality repairs, and a system that works the way it should.

While You’re Here

Explore Our
Other Services

Commercial HVAC

Keep your business comfortable, efficient, and operational with professional commercial HVAC services.

Extended Warranties

Protect your HVAC investment long after the manufacturer warranty expires.

Service Agreements

Protect your heating and cooling investment with a professional service agreement.

Preventive Maintenance

Regular HVAC maintenance helps prevent unexpected breakdowns, improve energy efficiency.

Indoor Air Quality Specialists

The air inside your home can contain dust, allergens, pet dander, mold spores, and other pollutants.

Upgrade or Replacement

When repairs become frequent and energy bills continue to rise.

Ready When You Are 

Enjoy Better Comfort
Without Wasting Energy

Call now or schedule online. Our technicians are ready to improve airflow, reduce energy loss, and make every room feel more comfortable.