Do you serve homes outside Johnstown city limits?

Yes. We serve all of ZIP 43031, including Monroe Township and the part of the ZIP that reaches into Delaware County.

My house was built in the 1950s. Can I add central air?

Often, yes. We'll check whether your ductwork can handle air conditioning or needs changes. If ducts don't reach certain rooms, a ductless mini-split can cool them without tearing into walls.

Should I replace my propane furnace with a heat pump?

It depends on your home and how you want to heat it. We'll show you both options side by side, with exact prices, so you can decide.

What should I do if my carbon monoxide alarm goes off?

Leave the house and call 911 or your gas company from outside. Don't go back in until they say it's safe. Then call us to find and fix the cause.

Always On Time

Johnstown HVAC Services

One Hour Heating & Air Conditioning® Serving Johnstown

4.82

(201360 reviews)

Heating & Air Conditioning in Johnstown, OH

Your Johnstown Heating and Cooling Team

Johnstown's story starts with a land grant. In 1800, President John Adams deeded this land to John Brown, a Revolutionary War soldier. Dr. Oliver Bigelow bought it in 1810, laid out the village and donated its streets and town square, where the Monroe Township Hall-Opera House has stood since the 1880s. In 1926 a nearly complete mastodon skeleton was found near town and went to the Cleveland Museum of Natural History. Johnstown passed 5,000 residents in the 2020 census and officially became a city in October 2021.

One Hour Heating & Air Conditioning® of Delaware heats and cools homes all over Johnstown and the surrounding 43031 countryside, whether your house is a few blocks off Main Street or out on a country road.

Our promise: Always On Time…Or You Don't Pay A Dime!® If we don't show up in the window you choose, the service call is free.

HVAC Services in Johnstown

Furnace repair and replacement: Natural gas furnaces in town and propane furnaces in the countryside.
Heat pumps: Repairs, tune-ups and new installs.
Electric furnaces and backup heat: Sequencers, elements and heat strips.
AC repair and installation: Including homes that never had central air.
Heating and AC tune-ups: Seasonal checkups, with club membership for yearly visits.
Ductless mini-splits: For additions, sunrooms and rooms the ductwork doesn't reach.
Humidifiers and indoor air quality: Whole-home humidifiers, air cleaners and better filters.
Duct cleaning: For dusty homes and systems that haven't been cleaned in years.
Thermostats: Smart and programmable thermostats, installed and explained.

Heating and Cooling Homes in Johnstown

Johnstown homes come from every era. Census estimates (ACS 2020-2024) put the median year built in the city at 1994. About 4 in 10 homes were built in 2000 or later, while about 1 in 5 date to before 1960. The 1950s alone account for about 11% of today's homes. That was the decade the Rolling Meadows neighborhood went up on the west side and the town's population more than doubled.

Inside the city, about 75% of homes heat with utility gas and about 22% with electricity. Columbia Gas of Ohio supplies natural gas, and electric service comes from AEP Ohio or The Energy Co-op, depending on the address. The wider 43031 ZIP looks different: about 47% utility gas, 26% electricity and 15% propane, with some fuel oil and wood heat too.

What that means for your system:

Older homes may have tired ductwork. Houses from the 1950s and earlier often have ducts sized for an older furnace, with central air added later.
Newer homes are aging into repairs. Systems installed in the early 2000s are in the range where parts start to wear out.
Country homes need fuel-specific care. Propane furnaces, heat pumps and electric heat each have their own checklist.

Johnstown Neighborhoods and Areas We Serve

Downtown Johnstown and the public square
Rolling Meadows on the west side
Leafy Dell
Homes near the T.J. Evans Trail trailhead on East Jersey Street
Homes along US 62 and SR 37
Monroe Township
The Delaware County side of ZIP 43031
The rest of ZIP 43031

Johnstown Local Insight

In Johnstown, the house tells us a lot before we open the furnace. Homes near the square and in the older neighborhoods often have systems that were swapped out more than once, sometimes with a bigger furnace or AC than the ducts were built for. That can mean noisy vents, hot upstairs rooms in July and cold corners in January. Sealing ducts, adding a return or putting a ductless mini-split in one problem room often works better than a bigger unit. Out in the countryside, the main question is usually fuel. If your propane furnace is getting old, compare a new propane furnace with a heat pump before you decide.

Why Johnstown Chooses One Hour Heating & Air Conditioning®

Always On Time…Or You Don't Pay A Dime!®: We arrive in the window you choose, or your service call is free.
StraightForward Pricing®: You see and approve the price before any work begins.
100% Satisfaction Guarantee: We guarantee our materials, labor and craftsmanship for up to two years from the date of service.
Licensed and Insured: Ohio License #51715.
Locally Owned: Our office is on Pittsburgh Drive in Delaware.
Financing Available: Options for larger repairs and new systems.
Club Membership: Members get annual tune-ups, priority scheduling and member discounts.

Seasonal HVAC Tips for Johnstown

Schedule a furnace or heat pump tune-up in September or October, before the heat runs every day. Check your filter monthly and change it when it's dirty. If you heat with propane, watch your tank level as winter sets in. After snow, clear the heat pump's outdoor unit and any furnace vent pipes outside. Come spring, book an AC check before the first hot spell.

Schedule HVAC Service in Johnstown Today

Call One Hour Heating & Air Conditioning of Delaware at (740) 204-2530 or book online. Pick the arrival window that works for you, and you'll see the price before we start. If your heat is out, tell us when you call or book, and we'll get you our soonest opening.

Learn more about our Delaware-based HVAC experts.

Book Now

HVAC Near Me In...

services the following communities:

Alexandria
Beechwood Trails
Bellepoint
Berlin Township
Broadway
Brown Township
Claibourne Township
Concord Township
Delaware
Delaware Township
Jersey Township
Johnstown
Kilbourne
Leonardsburg
Liberty Township
Norton
Oxford Township
Radnor Township
Scioto Township
St. Albans Township
Stratford
Taylor Township
Troy Township

We have a reputation for being punctual, friendly and knowledgable

4.82

(201360 reviews)

Read More Reviews

Very pleased with this company and our technician, Joshua. Scheduling was efficient and fast, they came out the same afternoon that I called. After I had another company come out that morning and tell us they could not fix my furnace dehumidifier, Joshua had it fixed in a short time after his arrival. Pricing was very fair. This is my new HVAC provider!

Mary Petit

in the last week

Needed my boiler repaired, called OneHour H & C. Alex was on time and did any excellent job. I would highly recommend them.

David Carpenter

in the last week

Great guys great work .

Ed LaFave

in the last week

Glad to have called One Hour Heating and Air Conditioning in San Ramon. Fast and courteous with great pricing for our house. We were really pleased with their service.

Genevieve Fay

in the last week

Andrew was excellent in his detailed review in quoting out a new heating/AC system for our home. He asked what I was looking for and we went room by room reviewing what was in each room. He confirmed that the current layout was very good and the system we had was the correct in its ratings. He prepared our quote as I had asked, no pressure with any additional ons or upsells as I was clear in what we were looking to do. He went over the quote with me line by line asking if I had any questions. Andrew was very polite and professional throughout the whole process. Can’t say enough good things about the dealings I have had with these two gentlemen along with the young lady I talked to on the phone. If you’re on the fence- call these guys.

Andrew Yantek

in the last week

"Great experience with One Hour Air! They showed up right on time, replaced my thermostat, and did a thorough AC maintenance check. Their pricing was very affordable and honest and their technician James was extremely knowledgeable. He explained everything he was doing and made me feel completely comfortable. He broke everything down clearly and never talked down to me or made me feel stupid. Highly recommend!!!

Log out of my Gmail mom Bruh

in the last week

Fast courteous service.

Keith Kendall

in the last week

Kelvin and champion did a phenomenal job at my residence repairing my air-conditioning unit. In the many years that I’ve lived here no technician have ever taken the time to explain the details of how to care for a unit and the importance of servicing a unit and the maintenance. Thank you one hour Air Conditioning for sending these two amazing technicians!

Charmaine Hunter

a week ago

The gentleman that came to my home were very professional, courteous and knowledgeable. They showed up at 9:00 Sharp! For electrostatic filter.

Erin Smith

a week ago

I am having a issue with my HVAC system leaking and I had a technician from one hour heating I believe and they told me I had a slew of issue and would cost me over $5,500+ to fix everything. I refused to believe that so I called around and found John and I couldn’t be happier, not only did he come over and explain the issue to where I could understand and how it occurred he was respectful and friendly AND the fix DID NOT cost $5,500 to fix. Not even close. If anyone ever needs HVAC work done call John, I promise he will help you to the best of his ability! Him and his partner are great! Thank you again!

Jay

a week ago

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