Air Conditioning in Hermann, MO
Air conditioning in Hermann faces 27.6 days a year over 90°F (BestPlaces) plus river-valley humidity. The right next step depends on what your system is doing today, so start here, then call us.
- 4.7 on Google(15 reviews)
- Serving Hermann since 1998
- Office at 124 E 10th St
Air Conditioning services
AC Repair
Warm air, water at the air handler, loud starts and short cycling traced to the failed part.
AC Installation
First-time central air and new builds, planned from the load calculation up.
AC Replacement
Old or failed unit? Repair and replacement priced side by side before you choose.
AC Maintenance
Spring tune-ups that clean coils, test connections and clear the drain line.
Ductless Mini Split Installation
Zoned cooling and heat for brick homes and additions without new ductwork.
Air conditioning in Hermann: which service fits?
Start with what the system is doing today.
| What you see | Start here |
|---|---|
| Warm air, ice, water or noise | AC repair |
| No central air yet, or a house under construction | AC installation |
| A failed or aging unit, or a large repair quote | AC replacement |
| Running fine, with summer coming | AC maintenance |
| Brick walls or an addition, and no ducts | Ductless mini splits |
A total failure in a heat wave belongs on our emergency AC repair page.
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.
Should you repair or replace an older AC?
Price both before you decide. ENERGY STAR flags an air conditioner past 10 years as worth a look, yet the EPA does not require anyone to give up working R-22 equipment. Age alone settles nothing. The size of the repair and the refrigerant usually do.
Is central air or ductless the better fit?
Existing ducts usually favor central air. The Department of Energy calls central the most even way to cool a home, and warns that it gets expensive without ductwork. Here the housing splits: 30.7% of Hermann homes date to 1939 or earlier (Point2Homes), while ZIP 65041's largest groups come from the 1970s and 1980s.
What should you ask an AC contractor?
Ask three things, because Missouri does not license HVAC contractors statewide as of late 2026 and rules are local. Who pulls the mechanical permit? Will you run a Manual J load calculation? Can I see your EPA Section 608 card? Our guide to choosing an HVAC contractor covers the rest.
Why does your utility bill matter?
Your bill tells you which programs exist for you. A Hermann city customer and a neighbor just past the limits may have different suppliers, or propane with no gas main at all.
Air conditioning service from a staffed Hermann office
Brian Grannemann Services has been in business since 1998 and keeps an office at 124 E 10th St, open weekdays, 8 AM to 4 PM. Call (209) 563-1270 about any of this work. Our HVAC contractor in Hermann, MO page explains how we work, and we also cover Owensville, Rhineland, Berger and New Haven.
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)“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.”
“Quick and great response to air conditioning repair.”
Good to know
Common questions
What kinds of air conditioning do you work on?
We work on central split systems and ductless units, along with the furnaces and heat pumps they often share a home with. If you are unsure what you have, send a photo of the outdoor unit's data plate and we can work out the rest.
Do Ameren or Spire AC rebates apply in Hermann?
Do not assume so. Inside the City of Hermann, gas and electric are municipal, and Ameren and Spire programs belong to investor-owned utilities. Outside city limits the supplier varies by address, so read your own bill first. Then check the program's current rules directly before you count on any money back.
How far from Hermann do you handle air conditioning work?
Our service area runs through Gasconade County and the counties around it. Rhineland is about 9 minutes from our office and Owensville about 43, while the far edge of the map is well over an hour. Call and give us your road, and we will tell you honestly how scheduling works from there.
Related services
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