What’s the best thermostat setting for summer in Johnson County?

For optimal comfort and energy savings during summer in Johnson County, set your thermostat to 78°F (25°C) when you're home. If you're away, raising it to 85°F can help reduce cooling costs. Using a programmable or smart thermostat can make these adjustments automatic and more efficient.

Do you provide emergency after-hours HVAC service in Johnson County?

We are available 24/7 to take your call for emergencies. Our appointment hours are listed above.

How can I improve indoor air quality in Johnson County?

To improve indoor air quality in Johnson County, start by regularly changing your HVAC filters, scheduling routine maintenance, and using air purifiers. Consider duct cleaning if your home has excessive dust or allergy symptoms. Proper ventilation and keeping your home clean are key to healthier air.

How often should I service my HVAC system in Johnson County?

It’s ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.

Do you offer HVAC financing in Johnson County?

We work with several lenders to provide financing options for qualifying customers. Ask your technician about your financing options.

How often should I have my furnace serviced in Johnson County?

It’s recommended to have your furnace professionally serviced once a year, ideally in the fall before the heating season begins in Johnson County. Annual maintenance helps ensure safe operation, improves efficiency, and can extend the life of your system.

How often should I have my air ducts cleaned in Johnson County?

It’s generally recommended to have your air ducts cleaned every 3 to 5 years in Johnson County, or more often if you notice dust buildup, allergies, or musty odors. Homes with pets, recent renovations, or high pollen levels in Olathe may benefit from more frequent cleanings to maintain healthy indoor air quality.

How often should I schedule AC maintenance in Johnson County?

You should schedule AC maintenance once a year, ideally in the spring before the cooling season starts. Regular tune-ups help your system run efficiently, prevent breakdowns, and extend the life of your unit, especially important in Johnson County's summer climate.

What size HVAC system is right for my home in Johnson County?

The right HVAC system size for your home in Johnson County depends on factors like square footage, insulation, number of windows, and local climate. A professional load calculation ensures your system is properly sized for comfort and efficiency. Oversized or undersized units can lead to higher energy bills and uneven temperatures.

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Johnson County HVAC Services

One Hour Heating & Air Conditioning® of Johnson County

4.9

(3471 reviews)

Heating & Cooling

Services By One Hour

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HVAC Emergencies

Fast 24/7 emergency HVAC repairs to restore your comfort when you need it most today.
Air Conditioning

Reliable air conditioning services to keep your home cool and comfortable all year.
Thermostat Repair

Expert thermostat services for precise temperature control and maximum energy savings.
Ductwork

Expert ductwork services to optimize airflow and maximize HVAC system efficiency.
Indoor Air Quality

Comprehensive air quality solutions for healthier, cleaner indoor air in your home.
Heating

Professional heating services to keep your home warm and comfortable year-round.

HVAC Repair, Installation & Maintenance

Our Story

Founded in 1987 by Ramon Blachly, One Hour Heating & Air Conditioning of Johnson County began as a family-run business built on honesty, respect, and a commitment to customer care. Starting from a basement office with his wife Janet handling operations and Ramon going door-to-door, the company quickly earned a loyal following. After acquiring Olathe Heating and Cooling and growing steadily, the business transitioned into a One Hour franchise in 2004, aligning with values of convenience, courtesy, and integrity.

Now a second-generation company led by son Jonathan Blachly, One Hour Heating & Air Conditioning continues to prioritize innovation and excellence. With numerous awards for customer service and operational performance, including multiple Top Net Promoter and Angie’s List Super Service honors, the team remains dedicated to “impressing the socks off” every customer. From humble beginnings to a thriving local business, their mission is to serve families with the same care they’ve shown since day one.

One Hour Heating & Air Conditioning technician Checkin HVAC.

Hours of Operation

We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:

Monday

24 hours

Tuesday

24 hours

Wednesday

24 hours

Thursday

24 hours

Friday

24 hours

Saturday

24 hours

Sunday

24 hours

HVAC Services Have Great Guarantees

Up-Front Pricing

No hourly charge … no surprises!

At One Hour, we believe you should NEVER have to pay the price for slow or inefficient service. That’s why we charge by the job, not the hour.

Because we charge by the job, you never pay for slow technicians. In fact, it’s in our best interest to get the job done right – the first time. Plus, we won’t waste time running around for parts or materials. Our trucks are fully stocked with almost every imaginable tools and parts, eliminating needless trips to our warehouse.

Our straight forward pricing system means a comprehensive estimate and job description for your review – BEFORE the work begins. There’s no worry about hours spent … and no costly surprises for you!

We have a reputation for being punctual, friendly and knowledgable

4.9

(3471 reviews)

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Kevin Castillo of One Hour Plumbing and Heating gave us a second opinion look and quote for our AC unit. We had previously been quoted $900 by Mission for a fix to our unit. Kevin listened to what details I gave him snd he was able to repair for 1/3 the cost! He also signed us up for annual maintenance of our unit and did more for us than Mission did in the past year! Hands down, One Hour Plumbing and Heating gave us confidence that they are the ones for us. Thank you Kevin!!

George Scott

April 6, 2026

Javier did a great job and was very kind!!! I would welcome him back anytime.

Natasha Sanderson

April 2, 2026

Our AC stopped working after hours and after not being able to contact our current company, which was unreliable, We were able to connect with One Hour, They sent Nick who was amazing very thorough with his review and fixed our AC. We are now working with them and always have Nick come over when any AC needs come up. They are a smaller family owned company and very responsive. We definitely recommend.

Katharina Santhiago

April 2, 2026

Apparently the filter needed replaced. All seems to be working well now.

Kenton Godfrey

April 1, 2026

All the reviews are spot on. From the initial repair call to the day our furnace got repaired they provided excellent service. Francisco was incredibly helpful with deciding which new unit to purchase and the entire service team communicated clearly with us the entire time!

David Schneider

March 31, 2026

We thought did an excellent job servicing our AC. He identified and addressed our AC issues in a timely manner and was very professional.

Andrew Beal

March 31, 2026

Sent someone within a few hours who was able to get the AC working again quickly for a decent price.

Teresa Vining

March 31, 2026

Good service, knowledgeable technician who explained everything clearly

Deb M

March 31, 2026

Kevin was awesome! He was prompt, very thorough in his assessment of our needs, took time to explain everything, and provided us with a variety of options moving forward. Kevin was very professional and polite, and he got us set up for installation on the spot. As of now we are very happy with Kevin and One Hour Heating & Air Conditioning 👍🏻

Scott Urschel

March 30, 2026

They did an amazing job. Were very timely and efficient and discovered the issue with my AC which ended up being a chewed up wire from a mouse. Would highly recommend them to anyone

Doug Risken

March 28, 2026

Here For You

When You Need Us Most!

Yellow One Hour Heating & Air Conditioning service van with company branding and slogan.

'Round the Clock Availability

No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee

We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide

Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®

We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

Financing Available!

Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.

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Meet the Johnson County Team

Jonathan

Owner/GM

Bio Coming Soon!
James

Operations Manager

Bio Coming Soon!
Evan

Install Manager

Bio Coming Soon!
Chris

Training Manager

Bio Coming Soon!
Mike

Assistant Operations Manager

None
Josh

Purchasing & Fleet

None
Sam

Chief People Officer

None
Sean

HVAC Technician

Bio Coming Soon!
Javier

HVAC Technician

Bio Coming Soon!
Logan

HVAC Technician

Bio Coming Soon!
Brandee

HVAC Installer

None
Caden

HVAC Technician

None
Adam

HVAC Installer

None
Erick

HVAC Technician

None
Francisco

HVAC Technician

None
Kirby

HVAC Installer

None
Kolby

HVAC Installer

None
Logan

HVAC Technician

None
Sam

HVAC Technician

None
Travis

HVAC Installer

None
Will

HVAC Technician

None
Caden

HVAC Technician

None
Kevin

HVAC Technician

None
Collin

Apprentice

None
Sam

Apprentice

None
Luke

Customer Service Representative

None
Josh

Customer Service Representative

None
Kaitlyn

Dispatcher

None
Shari

Dispatcher

None
Kyle

Videographer

None
Nicole

Marketing Coordinator

Bio Coming Soon!
Ticker

Chief Timekeeper

None

HVAC Near Me In...

One Hour Heating & Air Conditioning® of Johnson County services the following communities:

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Expert Tips

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