
Heating in Hermann, MO
Heating in Hermann has to carry a house through about 116 freezing nights a year, so start with what you burn: city gas, propane or electricity. We repair, replace and tune furnaces and heat pumps on all three, and we quote the work before we start.
- 4.7 on Google(15 reviews)
- Serving Hermann since 1998
- Office at 124 E 10th St
Heating services

Furnace Repair
No heat, cold air and ignition lockouts traced to the failed part.

Furnace Installation
New builds, additions and first-time furnaces, sized by load calculation for your fuel.

Furnace Replacement
Repair-or-replace numbers side by side when an aging furnace stops paying its way.

Furnace Maintenance
Fall safety checks, cleaning and tune-ups before freeze season arrives.

Heat Pump Repair
Ice-covered coils, constant aux heat and failed defrost cycles found and fixed.

Heat Pump Installation
Load-calculated heat pumps with the right backup for all-electric or propane homes.

Propane Furnace Service
No-heat repairs, venting checks and conversions for LP furnaces on rural property.

Geothermal Heat Pumps
Ground-loop systems planned around your acreage, soil depth and bedrock.
Which heating service do you need?
Pick by what the system is doing today.
- No heat, cold air or a lockout: furnace repair.
- An aging unit with a growing repair list: furnace replacement.
- A new build, addition or house with no furnace yet: furnace installation.
- Running fine, freeze season ahead: furnace maintenance.

Tell us what your system is doing
Our office is open Monday to Friday, 8 AM to 4 PM. Call and we will sort out the next step.
City gas, propane or electric: what heats your address?
Read your bill first, because the fuel decides the equipment. Inside the City of Hermann, gas is municipal.

Outside city limits it varies: Ameren, Spire, a rural co-op, or a tank in the yard with no main nearby. Our propane furnace service covers the regulator, orifices and venting that make LP different.

Heat pumps and ground-source heat
Heat pumps suit homes off the gas main, as long as defrost works through a winter averaging lows near 24°F. We handle heat pump repair and heat pump installation.

Rural properties with room to dig can look at geothermal heat pumps.

What should a heating contractor check first?
Safety, then the fault. The CPSC wants fuel-burning heat, flues and vents professionally inspected every year, and heating repair follows the same order: gas, venting, then the part that failed.

Heating in Hermann and the towns around it
We opened in 1998 and our office is at 124 E 10th St. Nearby areas we serve include Rhineland, Berger, Morrison and Owensville. Our HVAC contractor in Hermann, MO page lists everything else we do.
Calling is fastest
Prefer to write it down?
Calling gets you an answer sooner, especially if the house is cold or hot right now. If it can wait, send the details and our office will get back to you during business hours.
Smell gas? Do not use this form. Leave the building and call from outside.
What customers say on Google
4.7 on Google(15 reviews)“During one of the coldest days in decades, and with fresh snow falling, Brian came out to our house this evening to repair our faulty furnace so we would have heat. He didn't hesitate to make the trip out. Cannot express how much we appreciate his efforts and care. I highly recommend his company for your HVAC needs. Thank you!”
“I can’t say enough good about Brian and his company. They are my go to guy’s. I’ve had them work for me about a half dozen times now. No need to look elsewhere. They are fair and responsive to your needs.”
“Brian consistently shows up when promised, completes the work correctly the first time, and provides quality products. I cannot recommend him more highly.”
Good to know
Common questions
Who do I call when the heat quits outside office hours?
Call us anyway and tell us what is happening. The office runs weekdays from 8 to 4, so we cannot promise a night or weekend visit. If you smell gas, leave the house first and call from outside. If the house is cooling fast, read our emergency furnace repair page.
Does natural gas reach homes outside Hermann?
Some, and many do not. Inside the city, the Hermann Gas System supplies gas. Beyond city limits the supplier changes by address, and plenty of farms run on propane or electricity because no main reaches them. Your bill or your tank answers this faster than a map, and it changes which equipment fits.
Should I fix my heating system or replace it this winter?
Fix it if the system is under about 15 years old and the failure is a part such as an igniter, sensor or motor. Get a replacement price too if the heat exchanger has failed or the repairs keep coming. Ask us for both numbers before you approve anything.
Related services
Read next
Based at 124 E 10th St in Hermann, we work across Gasconade County and the towns around it, including Owensville, Morrison, Rhineland, Berger. See all the areas we serve.
Call Brian Grannemann Services
A Hermann company since 1998. Tell us what is going on and we will tell you what happens next.
- 4.7 on Google(15 reviews)
- Serving Hermann since 1998
- Office at 124 E 10th St
