HVAC Service

Need HVAC service? You’ll feel confident knowing your heating and cooling system is in good hands.


When winter hits in, don’t let your furnace leave you out in the cold. The experts at Grannemann’s can keep your system in shape so you can stay cozy and comfortable in your home all season long. Whether it’s time for annual maintenance to prepare your system for colder temperatures or you’re in need of an emergency repair, we’re ready to help. We’re also happy to help you weigh the benefits of a new system. At Grannemann’s Sales and Service, we can help you find and install a home comfort system that works for your home.


When temperatures rise, you want your air conditioning working efficiently to keep you cool. Grannemann’s Sales and Service can make sure your system is giving your home peak performance. Whether you want to look for a new, energy efficient system or just want a regular tune-up, we have your home covered. Stuck in the heat with a broken-down system? We can help. Call us for an emergency AC repair!

Schedule an Appointment Today

Grannemann’s Sales and Service has proudly served the Hermann area for years. Get in touch with us today to reach the ultimate in home comfort.


Be sure to ask about our Geo-Thermal option, too. We can survey your location and give you some good direction on how to use Geo-Thermal technology to your advantage and even lower your utility bills in the long run.


Electrical projects can be complicated. Luckily, the experts at Grannemann’s Sales and Service are here to help. Whether you need a small repair or are starting a large rewiring project, trust in us to make sure it’s done safely and efficiently. Our electricians are well trained and will make sure your home is up to code—no matter the size of your project. Give us a call to find out how we can be of service during your next home improvement mission.

Contact Us

    Serving These Communities

    New Haven

    Big Springs

    New Florence


    About Grannemann’s Sales and Service

    At Grannemann’s Sales and Service, we’re proud to offer products from Lennox® – a company whose dedication to your home comfort matches our own. We have the experience and skills to find the correct HVAC solution for your home, whether you need a small repair or a new system. Trust us to take care of your home and we’ll make sure you’re comfortable at all times. Call us at (573) 486-5712 or contact us online so we can work together toward total home comfort!

    Grannemann’s Sales & Service, Inc.

    Phone: 573-486-5712