Spray Foam Insulation – for an Energy Efficient Home!
Turn to the experts at ETRU for eco- friendly insulation options.
Learn More
Efficient, Environmentally Friendly Heating & Cooling Is Our Passion
Call us today to learn about all the benefits of High Efficiency Heating & Cooling Systems!
Learn More
ETRU is a Full Service HVAC Company who prides itself on fixing things the right way, the first time.
A family owned HVAC business, ETRU is here to fulfill all your refrigeration needs. We are a company that strives to satisfy all our customers, 100% of the time. If you are looking for a company that is full of integrity and honesty then you have come to the right place! ETRU can service a wide range of equipment and can also install a new system if needed. Our technicians are highly trained and certified, so you can be confident you are in good hands.
Proudly Serving Southern Illinois and Southeast Missouri


Why Choose Us?
- Integrity and Honesty is the foundation of our business
- We do your job right the first time
- 100% Satisfaction Guaranteed
- 24hr Emergency Service
We are licensed and insured
Our technicians are certified and have over 75 years of combined experienced
Local Reviews
ETRU Heating, Cooling, and Insulation Rated 5.0 out of 5 stars
based on 49 customer reviews