About Us

We’ve been keeping homes comfortable throughout Hermann since we started out in 1940.

Grannemann's Sales & Service, Inc. has been family owned and operated in Hermann since 1940. We’re a third-generation business offering outstanding heating, cooling, electrical and appliance services for all brands.

Ralph Grannemann Sr. started Grannemann Electric in 1940. He sold and serviced furnaces and air conditioners. Ralph also provided electric and plumbing to most of the homes and businesses in and around Hermann.

His son, Bob Grannemann, started Grannemann’s Radio & TV in 1952. Bob sold and serviced appliances, TVs, satellite and antenna systems. Later, he expanded into four Radio Shack franchises.

Bob’s son, Chad Grannemann, and his wife, Adrianna, bought Grannemann Electric from Bob. They combined the two businesses, which are known as Grannemann's Sales & Service.

The store may have changed names over the years, but one thing remains the same. Our family-owned business is dedicated to serving you. Grannemann’s has always been there to provide you with the courteous professional service you need.

At Grannemann’s, we sell the best and service the rest. Chad and his group of employees are happy to help you in any way they can. Our customers are our priority, so we proudly offer same-day services on emergency calls.

Chad services all brands of appliances, furnaces and air conditioners. He provides authorized service for Lennox® heating and cooling equipment, as well as Whirlpool®, Maytag® and GE® appliances. He and electrician Joel Steiner also offer many electrical services, such as wiring your home or business, fixing a light switch and installing digital antennas.

When it’s time for a new Lennox furnace or air conditioner, you can count on Scott Frederick to provide excellent replacement and installation services.

At our store, Carol can help with all your appliance purchases. We carry all the brands you trust, including Lennox, Whirlpool, Maytag, GE, Hotpoint® and Amana.

We also offer:

• AT&T® Wireless

• Appliance parts for do-it-yourselfers

• Electrical supplies

• Heating and cooling equipment and supplies

• Gas fireplaces

• The latest electronics

If we don’t have what you need or want, we’ll do our best to get it for you. Or we’ll point you in the right direction, because excellent customer service is always our goal.

Our family is here to help yours, so contact us at 573-468-5712 today to set up an appointment. You can also stop by our store.

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.

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