STI Heating & Air Conditioning

05/15/2026

Fossil fuel prices can change overnight. Imagine if your home’s energy source didn’t depend as much on fuel markets or overseas supply chains?

WaterFurnace geothermal systems use the stable temperatures underground to keep your home comfortable year-round, helping make it the lowest cost heating and cooling for your home. Because they run on electricity instead of purchased fuels, they help reduce exposure to the price swings we see in fossil fuel markets.

With WaterFurnace, energy independence can start at home.
https://www.waterfurnace.com/residential/

05/11/2026

Ever wondered how to make your home work smarter, not harder? In 2026, the ultimate 'Power Move' for homeowners in Northwest Indiana and Illinois is stacking rebates.

By upgrading to both a high-efficiency heat pump and a heat pump water heater at the same time, you aren't just doubling your comfort: you’re maximizing your savings. These incentives are designed to work together, putting more money back in your pocket while slashing those monthly utility bills.

At STI Heating and Air Conditioning, we’ve spent over 25 years helping our neighbors navigate these programs. We handle the technical side so you can enjoy the savings. From custom ductwork to expert installation, our licensed team delivers reliable, old-fashioned friendly service every time.

Ready to see how much you can save? Let’s discuss a solution that fits your home.

05/05/2026

05/04/2026

Summer is just around the corner, and we want to make sure your home stays a cool oasis!

Our $65 A/C Tune-up special is officially live for the month of May. Our team handles every part of the process in-house: from standard maintenance to custom ductwork, we’re your one-stop shop for reliable, friendly service.

Don’t wait for the first major heatwave to find out your system is struggling. Schedule your tune-up today and rest easy knowing your cooling system is ready to handle the heat.

Offer valid during normal business hours, discounts may not be combined with any other offers. Must present coupon at time of service. No cash value. Residential applications only. Expires 5/31/26.

Give us a call at 219-515-4007 to get your appointment on the books!

04/29/2026

Have you noticed the gap in your utility bills lately? As gas prices continue to climb faster than electric rates, more of our neighbors in Northwest Indiana and Illinois are looking for a smarter way to stay comfortable.

The shift toward high-efficiency electric systems isn't just a trend: it is a long-term investment in your home. Modern heat pumps offer incredible reliability and performance, helping you bridge the "Gas Bill Gap" while maintaining the perfect temperature year-round.

At STI Heating and Air Conditioning, we bring over 25 years of experience to every installation. Because we handle our own custom sheet metal work in-house, we ensure your new system is integrated perfectly with your existing ductwork for maximum efficiency.

We pride ourselves on providing good, old-fashioned friendly service combined with the latest HVAC technology. Whether you are curious about the switch or need a repair on your current unit, our team is here to help.

Let’s discuss a solution that makes sense for your home and your budget. Contact us to get started.

04/22/2026

Happy Earth Day! Today we’re celebrating the incredible energy right beneath our feet.

At STI, we believe the best way to power your home is by working with the planet, not against it. Geothermal HVAC is the ultimate solution for year-round comfort, using the earth’s natural temperature to heat and cool your home with unmatched efficiency.

With over 25 years of experience, we’ve seen firsthand how switching to geothermal transforms comfort and slashes utility bills. It’s not just a service: it’s an investment in energy independence. Plus, with a $8,000 tax credit currently available, there’s never been a better time to make the switch to a smarter, cleaner system.

Whether you're in Northwest Indiana or the Illinois suburbs, our team is here to handle everything from custom sheet metal ductwork to the final installation. We are your one-stop shop for professional, reliable geothermal solutions.

Let’s make your home a part of the future. Contact us to get started on your geothermal journey today!

04/21/2026

The world is finally catching on to what we’ve known for decades: geothermal is the future of energy.

Global investment is surging as geothermal becomes a strategic grid asset for a more stable future. While the rest of the world catches up, our team has been installing these systems across Northwest Indiana and Illinois for over 25 years.

We aren’t just installing units; we custom-fabricate our own ductwork in-house to ensure every system is perfectly tuned for your space. With rebates up to $8,000 currently available, there’s never been a smarter time to invest in your home’s energy independence.

Let’s talk about a system that works with the earth, not against it. Contact us to see how much you can save today.

04/14/2026

Have you heard? There’s a big switch happening in homes across Northwest Indiana and Illinois. For the first time, heat pumps are officially outselling traditional air conditioning units!

It makes a lot of sense when you think about it. Why settle for a system that only handles the cooling when you can have one smart unit that provides high-efficiency AC in the summer and reliable heating in the winter? It’s an investment in year-round comfort and lower energy bills.

At STI Heating and Air Conditioning, we’ve been helping our neighbors stay comfortable for over 25 years. Whether you're looking to upgrade your current setup or are curious about geothermal options, our team is here to provide the friendly, expert service we’re known for. We even handle our own custom ductwork in-house, making us a true one-stop shop for your install.

Ready to see if a heat pump is the right move for your home or business? Let’s discuss a solution that works for you. Contact us today to get started!

04/06/2026

Spring is here, but for many of us, that means the pollen spike has arrived too. It is time to turn your home's HVAC system into "Allergy Armor" to protect your indoor air quality.

While a standard filter change is a good start, we can help you go much further. Our team provides advanced air purification solutions that actually scrub the air as it circulates through your ductwork, removing microscopic allergens before they reach your family.

With over 25 years of experience serving Northwest Indiana and Illinois, we specialize in making homes healthier and more comfortable. Whether it is custom ductwork or a new air scrubbing system, we have the expertise to get it done right.

Let's discuss a solution to keep your home a pollen-free zone this season. Contact us to get started on your air quality upgrade.

04/01/2026

DATA CENTER: AI centers use as much power as 100,000 homes. By 2030, demand grows 133%. Geothermal tech reduces peak demand and transfers heat to neighbors via thermal networks, creating a smart, sustainable loop.