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Find Air conditioning pros in Knoxville

"Stopped the leak which is most important."

Ryan C on October 2025

JCB Handyman/Masonry offers experienced finish carpentry, framing, and general handyman work in Carroll county MD Contact us today for an estimate!

"Stopped the leak which is most important."

Ryan C on October 2025


Markool Heating & Cooling, LLC

4.68(
17
)
Approved Pro

Markool Heating & Cooling, LLC

4.68(
17
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
41 local quotes requested

Welcome to Markool Heating & Cooling. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text, or email today, and let us get started!

"Woke up this morning to my hvac leaking and contacted Markool. I have never used them before and was in a pinch. They fit me right in this morning and were out at my house within 2 hours. The tech stepped in the door and placed covers for his shoes so he did not track in any dirt which was impressive! The tech was very professional and super friendly. Problem was diagnosed and FIXED within an hour. The price was extremely reasonable to the point I was shocked in a good way (expecting a higher price). Anyways, I will most certainly be a returning customer. Thank you Markool Heating Cooling Plumbing."

Chase R on August 2024

Welcome to Markool Heating & Cooling. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text, or email today, and let us get started!

"Woke up this morning to my hvac leaking and contacted Markool. I have never used them before and was in a pinch. They fit me right in this morning and were out at my house within 2 hours. The tech stepped in the door and placed covers for his shoes so he did not track in any dirt which was impressive! The tech was very professional and super friendly. Problem was diagnosed and FIXED within an hour. The price was extremely reasonable to the point I was shocked in a good way (expecting a higher price). Anyways, I will most certainly be a returning customer. Thank you Markool Heating Cooling Plumbing."

Chase R on August 2024


Avatar for Twin Lakes Electric

Twin Lakes Electric

4.99(
40
)
Approved Pro

Twin Lakes Electric

4.99(
40
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
26 years of experience

Twin Lakes Electric, Inc., provides prompt, professional service. Quality work is our priority. We repair outlets and fixtures. we offer a wide rage of electrical specialties. We also provide HVAC services for residential & light commercial buildings. Call us today for your next project.

"Dave and his helper were prompt, professional and highly knowledgeable. He answered all my questions and found a way to address our problem at a very reasonable cost, instead of just recommending a new system."

Sharon S on July 2024

Twin Lakes Electric, Inc., provides prompt, professional service. Quality work is our priority. We repair outlets and fixtures. we offer a wide rage of electrical specialties. We also provide HVAC services for residential & light commercial buildings. Call us today for your next project.

"Dave and his helper were prompt, professional and highly knowledgeable. He answered all my questions and found a way to address our problem at a very reasonable cost, instead of just recommending a new system."

Sharon S on July 2024


Avatar for Michael Bonsby HVAC, Plumbing & Electrical MD

Michael Bonsby HVAC, Plumbing & Electrical MD

4.56(
113
)
Approved Pro

Michael Bonsby HVAC, Plumbing & Electrical MD

4.56(
113
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
39 local quotes requested

At Michael Bonsby Heating & Air Conditioning, LLC, we're a well established business with over 25 years of HVAC experience and expertise. The customer experience is paramount, and your preferences and priorities are always our first concern. We're very timely with our work and always pay attention to detail. We invite you to give us a call and speak with one of our consultants. Anytime, day or night, we are always available to answer questions, and offer ideas.

"Gavin Otto provide an excellent service and very customer focused."

Marcos D on December 2024

At Michael Bonsby Heating & Air Conditioning, LLC, we're a well established business with over 25 years of HVAC experience and expertise. The customer experience is paramount, and your preferences and priorities are always our first concern. We're very timely with our work and always pay attention to detail. We invite you to give us a call and speak with one of our consultants. Anytime, day or night, we are always available to answer questions, and offer ideas.

"Gavin Otto provide an excellent service and very customer focused."

Marcos D on December 2024


Avatar for American Chimney Contractor Near Me

American Chimney Contractor Near Me

5.00(
5
)
Approved Pro

American Chimney Contractor Near Me

5.00(
5
)
Approved Pro
Customers say: Quick response
106 local quotes requested
30 years of experience

American Chimney Contractor Near Me LLC & American HVAC Contractors MD have partnered to bring you the ultimate one-stop solution for all your home comfort needs in Maryland, Virginia, and D.C. We've combined our expertise to offer a comprehensive range of services, allowing you to schedule a single appointment for multiple needs. We are committed to providing top-notch service and ensuring your complete satisfaction. Our services include: Chimney & Fireplace Services: -Chimney Cleaning: Professional sweeping to remove creosote, soot, and blockages, preventing chimney fires and improving efficiency. -Chimney Inspection: Thorough inspection of your chimney's structure, flue, and cap to identify potential hazards and needed repairs. -Chimney Repair: From minor mortar fixes to major structural repairs, we handle all types of chimney damage. -Chimney Relining: Installation of new liners (stainless steel, clay, or cast-in-place) to restore the safety and integrity of your flue. -Fireplace Installations: Expert installation of new fireplaces, stoves, and inserts to enhance your home's ambiance and warmth. -Dryer Vent Cleaning & Re-routing: Professional cleaning to remove lint buildup, reduce fire risk, and improve dryer efficiency. We also offer re-routing services for optimal performance. HVAC Services: -AC System Installation: Professional installation of new, high-efficiency air conditioning systems to keep your home cool and comfortable. -AC System Repair: Fast and reliable repairs for all makes and models of AC units, addressing issues from refrigerant leaks to electrical problems. -AC System Maintenance: Routine tune-ups to maximize your system's performance, extend its lifespan, and prevent costly breakdowns. -Heating System Installation: Expert installation of furnaces, boilers, and heat pumps for reliable warmth throughout the colder months. -Heating System Repair: Quick and efficient repairs to restore heat and safety to your home, no matter the issue. -Heating System Maintenance: Regular check-ups to ensure your heating system operates safely and efficiently all winter long. -Ductless Heating and AC Services: Installation, repair, and maintenance of ductless mini-split systems for zoned comfort savings.

"I am impressed with the services I got from American Contractor Near Me LLC Their team was friendly and professional, and did a great job installing the chimney. They worked quickly and thoroughly, and they left my property clean. I was shocked at how much it changed! Their prices were fair, and the work they did was excellent. Do not be afraid to hire them to work on your chimney. They are the best at what they do!"

Adam H on July 2025

American Chimney Contractor Near Me LLC & American HVAC Contractors MD have partnered to bring you the ultimate one-stop solution for all your home comfort needs in Maryland, Virginia, and D.C. We've combined our expertise to offer a comprehensive range of services, allowing you to schedule a single appointment for multiple needs. We are committed to providing top-notch service and ensuring your complete satisfaction. Our services include: Chimney & Fireplace Services: -Chimney Cleaning: Professional sweeping to remove creosote, soot, and blockages, preventing chimney fires and improving efficiency. -Chimney Inspection: Thorough inspection of your chimney's structure, flue, and cap to identify potential hazards and needed repairs. -Chimney Repair: From minor mortar fixes to major structural repairs, we handle all types of chimney damage. -Chimney Relining: Installation of new liners (stainless steel, clay, or cast-in-place) to restore the safety and integrity of your flue. -Fireplace Installations: Expert installation of new fireplaces, stoves, and inserts to enhance your home's ambiance and warmth. -Dryer Vent Cleaning & Re-routing: Professional cleaning to remove lint buildup, reduce fire risk, and improve dryer efficiency. We also offer re-routing services for optimal performance. HVAC Services: -AC System Installation: Professional installation of new, high-efficiency air conditioning systems to keep your home cool and comfortable. -AC System Repair: Fast and reliable repairs for all makes and models of AC units, addressing issues from refrigerant leaks to electrical problems. -AC System Maintenance: Routine tune-ups to maximize your system's performance, extend its lifespan, and prevent costly breakdowns. -Heating System Installation: Expert installation of furnaces, boilers, and heat pumps for reliable warmth throughout the colder months. -Heating System Repair: Quick and efficient repairs to restore heat and safety to your home, no matter the issue. -Heating System Maintenance: Regular check-ups to ensure your heating system operates safely and efficiently all winter long. -Ductless Heating and AC Services: Installation, repair, and maintenance of ductless mini-split systems for zoned comfort savings.

"I am impressed with the services I got from American Contractor Near Me LLC Their team was friendly and professional, and did a great job installing the chimney. They worked quickly and thoroughly, and they left my property clean. I was shocked at how much it changed! Their prices were fair, and the work they did was excellent. Do not be afraid to hire them to work on your chimney. They are the best at what they do!"

Adam H on July 2025


Avatar for Wenbrooke Services

Wenbrooke Services

4.71(
100
)
Approved Pro

Wenbrooke Services

4.71(
100
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
78 local quotes requested

It is our mission, to provide excellent workmanship and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"They did a great job. "

Atiq H on July 2025

It is our mission, to provide excellent workmanship and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"They did a great job. "

Atiq H on July 2025


Avatar for One Stop

One Stop

4.50(
2
)
Approved Pro

One Stop

4.50(
2
)
Approved Pro
39 years of experience
Free onsite estimate

One Stop Home Improvement is owned and operated by Michael Baker out of Silver Spring MD. With over 35 years of experience in the industry, Michael provides reliable home improvement services for both residential and commercial projects. He can handle any and all types of work from small repairs to large projects. His services cover appliances, drywall, painting, tile, window coverings, doors, and general handyman work. Michael is a highly motivated professional who takes pride in delivering quality craftsmanship and dependable solutions for homeowners and business owners. Contact Information Phone 240-863-1667 Email michaelbaker609@gmail.com

"Mike Baker is an awesome handy man with a diverse number of skills. Mike has always reported for any job I hire him for on time or early. Mike takes pride in all his work and always does a top-notch job. Mike always has me look over each job to make sure I am happy with the completed job he has done for me. Recommend you hire him for all your handy man needs."

Dale B on August 2025

One Stop Home Improvement is owned and operated by Michael Baker out of Silver Spring MD. With over 35 years of experience in the industry, Michael provides reliable home improvement services for both residential and commercial projects. He can handle any and all types of work from small repairs to large projects. His services cover appliances, drywall, painting, tile, window coverings, doors, and general handyman work. Michael is a highly motivated professional who takes pride in delivering quality craftsmanship and dependable solutions for homeowners and business owners. Contact Information Phone 240-863-1667 Email michaelbaker609@gmail.com

"Mike Baker is an awesome handy man with a diverse number of skills. Mike has always reported for any job I hire him for on time or early. Mike takes pride in all his work and always does a top-notch job. Mike always has me look over each job to make sure I am happy with the completed job he has done for me. Recommend you hire him for all your handy man needs."

Dale B on August 2025


Avatar for SPECS Heating & Cooling

SPECS Heating & Cooling

5.00(
14
)
Approved Pro

SPECS Heating & Cooling

5.00(
14
)
Approved Pro
Customers say: Quick response
101 local quotes requested
1 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Service was fast and courteous. Both techs, Jermaine and Raoul, were great!"

Karen Maria J on September 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Service was fast and courteous. Both techs, Jermaine and Raoul, were great!"

Karen Maria J on September 2025


"Great folks to work with"

Tom H on September 2023

Here at Weather Masters we pride ourselves on affordable, reliable and honest service. With free replacement estimates and competitive service rates, we do our best to keep you and your bank account comfortable.

"Great folks to work with"

Tom H on September 2023


Avatar for Air Distributor HVAC

Air Distributor HVAC

4.90(
20
)
Approved Pro

Air Distributor HVAC

4.90(
20
)
Approved Pro
Customers say: True professional
3 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Yes. The project was completed. New thermostat was purchased and installed. Total work time was 3 hrs."

John K on November 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Yes. The project was completed. New thermostat was purchased and installed. Total work time was 3 hrs."

John K on November 2025

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FAQs for air conditioning projects in Knoxville, MD

You can identify your system's refrigerant type by examining the data plate or label often located on the outdoor condensing unit. Look for "R-22" or "HCFC-22" in the specifications. 

Manufacturing date provides another clue—systems produced before 2010 often use R-22, while newer units utilize alternative refrigerants. If the label is missing or unclear, a qualified HVAC technician can determine your refrigerant type during a service inspection.

Federal regulations prohibit the purchase and handling of R-22 refrigerant without proper EPA certification. These restrictions exist because R-22 contributes to ozone depletion when released into the atmosphere and requires specialized handling procedures. 

Additionally, improper refrigerant charging can damage your system and create safety hazards. Professional technicians have the training, equipment, and legal authorization to properly diagnose, repair, and recharge your system.

Air conditioning systems require approximately two to four pounds of R-22 per ton of cooling capacity, with three pounds per ton being the average. For example, a 3-ton system needs about nine pounds of refrigerant for a complete charge. However, the exact amount varies by manufacturer, model, and system configuration. A professional technician will determine the precise charge required for your specific equipment.

While technically possible to retrofit some R-22 systems to use alternative refrigerants, these conversions require substantial modifications to system components and are rarely cost-effective. The compressor, expansion valve, and sometimes the entire coil system would need replacement or adaptation. Most homeowners find that investing in a complete system upgrade provides better long-term value and performance than attempting conversion of aging equipment.

Though new production of R-22 ended in 2020, reclaimed and recycled supplies remain available but are steadily decreasing. The EPA's final phaseout deadline extends to 2030, but practical availability may become severely limited well before that date. As supplies continue to diminish, expect prices to rise accordingly. Homeowners with R-22 systems should begin planning for eventual system replacement as part of their long-term home maintenance strategy.

The Knoxville, MD homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.