AC Installation & Replacement

AC Installation & Replacement in Bay City, MI

Trusted AC Installs from Custom Engineering Since 1984

Thinking about replacing or adding AC to your property? We’ve been helping folks in Bay City, Saginaw, and Midland stay cool through Michigan’s sticky summers since the mid-80s. We've worked with all kinds of setups and layouts, from historic homes near downtown Bay City to commercial spaces and newer properties in Saginaw Township.

At Custom Engineering, we install reliable central air systems and ductless Mitsubishi Electric mini-splits, depending on what best suits your property and budget. If you're unsure where to start, no worries—we’ll walk you through your options and help you choose what works best for your space.

Need professional AC installation in Bay City? Contact us today at (989) 474-2870 or online and get a free AC installation or replacement estimate.

What to Expect with an AC Installation or Replacement

Getting a new air conditioning system isn’t just about replacing old equipment; it’s about creating a cooler, more comfortable home or property that fits your needs.

Whether you’re installing a new system or replacing an outdated one, here’s how we handle the process:

In-home evaluation. We always begin by visiting your property to get a real sense of your space. Whether you have an older system or you’re starting fresh, we’ll inspect your current setup, including your ductwork. We’ll discuss what’s been working, what hasn’t, and what you’d like to improve.
Personalized recommendations. Once we understand your space, cooling needs, and budget, we’ll present a few solid options. We typically install high-efficiency units from trusted brands like Trane and Mitsubishi Electric, which are ideal for Michigan homes and businesses dealing with humidity and temperature fluctuations.
Smooth, professional installation or replacement. If you’re replacing an old system, we’ll remove the outdated unit and replace it with a high-performing model. Our team handles the full installation and tests everything before we leave and always takes the time to answer any questions.

Our commitment to customer satisfaction doesn't end once the installation is complete. We provide thorough post-installation support, offering guidance on system operation and maintenance tips to maximize efficiency and longevity. Regular maintenance checks and timely service can prevent minor issues from becoming significant problems, ensuring your system runs smoothly for years to come.

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Custom Comfort, Professional Care

What Makes Us Different?

At Custom Engineering, we always put you first. That’s why so many people in Bay City trust us time and again.

Our dedication to customer service means going beyond just installation and repair. We actively listen to your concerns and strive to address them promptly and effectively, ensuring that every interaction leaves you feeling valued and satisfied. Our team is not only skilled but also approachable, making every effort to build long-lasting relationships with our clients based on trust and transparency.

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Affordable Financing Options
We make HVAC services affordable with financing options offering 0% interest for 72 months.
Available Nights & Weekends
No matter when you need us, we're ready to help. Someone is always available to answer your call.
Preventative Maintenance Plans
Keep your system in perfect shape all year round with our programs.
Locally Owned & Operated
As a proud Michigan company, we deliver honest, dependable HVAC services backed by local expertise and care.

Choosing the Right System for Your Property

Having the right AC system for your space depends on a few key things.

We’ll help you compare models based on:

Size and cooling capacity for your square footage
Noise levels that are important for bedrooms or living spaces
SEER ratings, which tell you how efficient the system is
Optional features like zoning or Wi-Fi thermostats

Whether you’re looking at a ductless setup in a bungalow or a full central system for a larger property, we’ll guide you toward something that fits your space and your budget.

Choosing the right system also involves considering the long-term operational costs. With advancements in technology, modern AC systems offer smart features that not only improve comfort but also increase energy efficiency, providing you with substantial savings on utility bills. Our team stays updated on the latest trends and will advise on systems that integrate well with existing smart home technologies.

Benefits of Upgrading Your AC System

Upgrading your AC is an investment in both comfort and cost savings. New systems come with energy-saving features and smart home compatibility that older models simply can’t offer.

Here’s what you gain with an upgrade:

Lower Energy Bills: High-efficiency models reduce electricity usage.
Consistent Cooling: Say goodbye to hot spots and fluctuating temperatures.
Better Air Quality: Modern systems include advanced filtration to reduce allergens and humidity.
Quiet Operation: New units are engineered for near-silent performance.
Smart Controls: Integrate Wi-Fi thermostats for remote temperature control.

A new installation also increases the resale value of your property and ensures your system meets current building codes and efficiency standards.

Contact us today at (989) 474-2870 or online and get a free AC installation or replacement estimate.

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Trusted by homeowners and Businesses Since 1984

At Custom Engineering, your satisfaction is our priority! See for yourself what our customers have to say about working with us.

"Custom Engineering took care of us right away!"
Our initial call was after hours and not an emergency. We received a call first thing the next morning, and they came out within a few hours. Both gentlemen were very professional and knowledgeable, and were able to repair our furnace right then and there.

- Reid K.
"They have been an excellent company to work with."
Always courteous & competent. They installed a new furnace, AC, garage gas heater, and ran a gas line into our laundry room. They stayed on the job until all was completed and we were extremely satisfied.

- Terrance V.
"This business is the best!"
We bought our kitchen hood system from them, which they also installed (no small task). They are dependable, efficient, and do great work. Prices are what I would expect for the job. Don't hesitate to hire them.

- Marinell S.
"They really came through!"
Quick, efficient, and friendly service from both office staff and techs. Fair pricing. Grateful for their help on a freezing day when our furnace failed. Feared the worst. Highly recommend this company!

- Tammie S.
"By far the most professional and reliable company."
Every employee I have had the pleasure of dealing with has been top-notch. Today's visit by Tyler for annual maintenance was great. He was punctual, friendly, and professional.

- Michelle G.
"Nick was fantastic!"
He got our furnace up and running again very quickly (on a Saturday!). Very personable and professional! We will definitely be using Custom Engineering Heating & Cooling again - thank you!

- Krista W.
"10/10 Service!"
Had Customer Engineering come out to my restaurant to diagnose my furnace and walk-in freezer. Brandon and Skylar, the techs, were amazing. Extremely friendly and knowledgeable. I will be using them for all my HVAC needs moving forward.

- Taylor A.
"They did an excellent job - all in one day!"
I always try to keep my business local, so I called Custom Engineering. They always answered my calls promptly, and the service was friendly with experienced technicians. They were prompt, courteous, and really put my fears to rest. Great job!

- Debbie M.

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Save Energy, Save on Cooling with AC in Bay City

Newer AC units are built to be more energy-efficient than older models, which means they can help lower your cooling bills over time, especially during those hot and humid Michigan summers. Many of the systems we install are ENERGY STAR® rated. And if you’re looking for a more flexible way to pay, we offer 0% financing through Wells Fargo for qualified homeowners.

Should You Repair or Replace Your AC in Midland?

Sometimes a system can be fixed, but sometimes replacing it just makes more sense. If your AC has been acting up, here are a few signs that it might be time to consider an upgrade:

Repairs are becoming more frequent or costly
Cooling is uneven or unreliable from room to room
Your energy bills keep climbing
The system is over 10–15 years old

We’ll evaluate your current unit and help you weigh the options, without pushing you one way or the other.

We recognize that deciding to repair or replace can be daunting. Our transparent assessment process is designed to empower you with the information needed to make an informed decision. We'll explain the cost-benefit ratio of your options in straightforward terms, ensuring you're comfortable and confident with whichever choice you make.

Warranty & Support You Can Count On

We take pride in our work and are always here to assist you. All installations come with a 5-year labor warranty for peace of mind. If something doesn’t seem right after installation, you’ll talk to a real person when you call us at any time of day. We’re available 24/7 to help troubleshoot and walk you through the next steps if needed.

Need AC replacement in Bay City? Call (989) 474-2870 today or contact us online to schedule your free estimate for AC installation or replacement.

Commonly Asked Questions

How long does it take to install a new AC system?

Most AC installations can be completed in one day. Larger or more complex systems may take 1–2 days depending on ductwork and property size.

What’s the best AC system for a small home?

For smaller homes or apartments, ductless mini-split systems are a great option. They’re energy-efficient, quiet, and don’t require ductwork.

How often should I replace my AC system?

Most systems last 10–15 years. If your unit is in that range and struggling to keep up, it’s worth considering a replacement.

What are SEER ratings and why do they matter?

SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency. Higher SEER ratings mean lower energy use and better savings.

Does a new AC system improve air quality?

Yes. Many modern systems include built-in filtration, humidity control, and ventilation features that enhance indoor air quality.

Is your AC installation service available in Bay City and Midland?

Yes, we proudly serve Bay City, Midland, and surrounding areas with professional air conditioning installation and replacement services.

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