Fast, honest HVAC service in Kennesaw that gets your home comfortable again.
Repair, replace, or upgrade your heating and cooling system with a local team that services all makes and models, shows up when promised, and helps you make the right decision without pressure.
- 24/7 Emergency HVAC Service
- Free Estimates Within 24 Hours
- 0% Financing Available
- 12-Year Unit Replacement Warranty
- 3-Year Labor Warranty
- Licensed and Insured
On-time, every time
Licensed, insured, and respectful of your home.
Request Your Call
Tell us what's going on and our team will reach out as quickly as possible.
When your HVAC system struggles, your whole house feels it.
A unit that won't cool, uneven temperatures, weak airflow, rising power bills, strange noises, or a furnace that won't keep up can turn a normal day into a stressful one fast. Most homeowners aren't looking for a sales pitch — they want someone to answer the phone, show up on time, explain the problem clearly, and fix it the right way.
AC not cooling the house
Furnace not heating evenly
System keeps breaking down
Energy bills keep climbing
Poor airflow or hot/cold spots
Dust, humidity, or air quality issues
Need help right now?
24/7 emergency service available.
Heating and air built around what homeowners actually need.
From emergency repairs to full system installs, the focus is the same: restore comfort, improve efficiency, and make the next step easy.
- 1
We listen
Tell us what's happening — we don't rush the conversation.
- 2
We inspect & explain
Clear diagnosis with photos when helpful, no jargon.
- 3
We recommend
Practical options that fit your home and budget.
- 4
We complete & stand behind it
Quality work backed by strong warranties.
Complete HVAC services for your home
Whether you need a quick repair or a full replacement, we handle the work that keeps your home comfortable year-round.
AC Repair & Maintenance
Warm air, short cycling, weird noises, climbing bills — we diagnose the issue and get your system running properly. Maintenance plans help prevent the next breakdown.
Get AC ServiceAC Installation & Replacement
Aging or unreliable? We install high-efficiency systems sized for your home and goals, with options compared clearly so you can choose with confidence.
Get a Free AC EstimateHeating Repair & Maintenance
Furnace not keeping up? We troubleshoot, explain what we find, and make the right repair with safety and reliability in mind.
Get Heating ServiceHeating Installation
Dependable, energy-efficient heating equipment installed for long-term comfort and lower operating costs.
Request a Heating EstimateDuctwork Installation
Poor duct design wastes comfort and money. We install and optimize ductwork to improve airflow and even out temperatures.
Improve My AirflowIndoor Air Quality
Cleaner air can mean fewer allergens, less dust, and better humidity control. Solutions that help you breathe easier every day.
Improve My Air QualityWhy homeowners choose Callison's Heating & Air
Local & Family-Owned
Personal service from a company that works in your community.
15+ Years of Experience
Hands-on HVAC expertise across repair, replacement, and upgrades.
Licensed & Insured
Qualified professionals with the right protections in place.
All Makes & Models
Help for your current system, even if we didn't install it.
Rheem & Daikin Experience
Trusted equipment knowledge for high-efficiency options.
24/7 Emergency Service
When your system fails at the worst time, you can still get help.
Warranties That Add Confidence
Up to 12-year unit replacement and 3-year labor warranties on select systems.
Financing Available
Get the comfort you need now with approved financing options.
Savings and financing that make it easier to move forward
0% Financing Available
Approved financing options that help you replace or upgrade without delay.
Ask About FinancingFree Estimate Within 24 Hours
Need pricing on a repair or replacement? Get a fast, free on-site estimate.
Request My Estimate15% Off — Military, Veterans & First Responders
A thank-you discount on qualifying services.
Claim This Offer5% Off — Senior Discount
Helpful savings on qualifying services for senior homeowners.
Ask for Senior DiscountFree IAQ Upgrade With Select System Purchases
Ask whether your new system qualifies for an added indoor air quality upgrade.
See If I QualifyTrusted by homeowners across the Kennesaw area
When people invite you into their home, trust matters. Homeowners call us because they want straight answers, dependable work, and comfort they can count on.
"Called on a Saturday when our AC quit. They were here within hours, found the issue fast, and were upfront on cost. House cool again before dinner."
Sarah M.
Kennesaw, GA
"Got three quotes for replacement. Callison's was the only one that walked me through options without pressure. Clean install, stand behind their work."
Mike T.
Acworth, GA
"Honest, on time, respectful of our home. Explained what was wrong and didn't try to upsell. We'll use them every time."
Jenna R.
Marietta, GA
You should never feel pressured into HVAC work.
When your system is down, it's easy to feel rushed. Our job is to make the next step clear, not confusing. If a repair makes sense, we'll tell you. If replacement is the smarter long-term move, we'll explain why.
- Clear communication
- Honest recommendations
- Options that fit your home and budget
- Upfront guidance on the work
- Strong warranty support on qualifying systems
Proudly serving Kennesaw and surrounding areas
Not sure if you're in our service area? Call and ask — we're happy to help.
HVAC questions homeowners ask before they call
How do I know if I need repair or replacement?+
If your system is newer and the issue is isolated, repair is often the right move. If it's older, breaking down often, or costing more to run, replacement may save you more over time. We help you compare both options clearly.
Do you offer emergency HVAC service?+
Yes. Emergency service is available 24/7 for urgent heating and cooling issues.
Do you work on all makes and models?+
Yes. We service all makes and models and can diagnose most common residential HVAC issues.
Do you offer financing?+
Yes. Ask about approved financing options, including 0% financing availability.
How quickly can I get an estimate?+
Free estimates are available within 24 hours in many cases.
How often should I maintain my HVAC system?+
Most systems should be serviced twice a year — once before cooling season and once before heating season.
Can you help improve indoor air quality?+
Yes. We offer solutions that can help reduce dust, allergens, humidity issues, and other common indoor air concerns.
Need HVAC help today?
Call now for emergency service, request a repair, or book your free estimate within 24 hours.