Trident Mechanical Systems Inc is a trusted family owned heating and air conditioning company serving Concord, NC and the surrounding area. We pledge to provide you with the best service possible while making you feel like you are part of our family. 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!
"These guys were great! No matter who you buy from the equipment is very similar. The difference is the people. Theyâ re honest, on time and will give you a fair price with great work. If you have any HVAC needs we highly recommend you call Trident Mechanical."
Patrick M on January 2021
Trident Mechanical Systems Inc is a trusted family owned heating and air conditioning company serving Concord, NC and the surrounding area. We pledge to provide you with the best service possible while making you feel like you are part of our family. 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!
"These guys were great! No matter who you buy from the equipment is very similar. The difference is the people. Theyâ re honest, on time and will give you a fair price with great work. If you have any HVAC needs we highly recommend you call Trident Mechanical."
Patrick M on January 2021
HS Services HVAC Inc is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. With a 24hr service.
"These guys were awesome! They arrived on schedule and knocked out the needed work on no time. My new HVAC crew for sure."
Dusty T on November 2019
HS Services HVAC Inc is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. With a 24hr service.
"These guys were awesome! They arrived on schedule and knocked out the needed work on no time. My new HVAC crew for sure."
Dusty T on November 2019
Welcome to Unique Air, LLC, a family owned and operated HVAC company based in Dallas, North Carolina. Serving the Charlotte metro region with heating and air conditioning installation and repairs, we have the skills and expertise to get the job done right. Whether you're looking for a new AC or heater or maintenance updates, Unique Air is a full-service company for all your HVAC needs. Since our opening we have strived to provide the best service possible. With many years of expertise, Unique Air works to ensure 100% satisfaction on every installation or repair. Fully certified, accredited, and well versed in regulations, Unique Air has the know-how and the drive to get your heater or AC unit in top working order.
"I would recommend them to anyone. Friendly and good quality workmanship."
David L on November 2023
Welcome to Unique Air, LLC, a family owned and operated HVAC company based in Dallas, North Carolina. Serving the Charlotte metro region with heating and air conditioning installation and repairs, we have the skills and expertise to get the job done right. Whether you're looking for a new AC or heater or maintenance updates, Unique Air is a full-service company for all your HVAC needs. Since our opening we have strived to provide the best service possible. With many years of expertise, Unique Air works to ensure 100% satisfaction on every installation or repair. Fully certified, accredited, and well versed in regulations, Unique Air has the know-how and the drive to get your heater or AC unit in top working order.
"I would recommend them to anyone. Friendly and good quality workmanship."
David L on November 2023
We have years of experience in the business! Here at Hornets Heating & Cooling 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!
"After receiving extremely high estimates to replace the evaporator coil, I finally found a company who doesn’t try to take advantage of people by marking up the costs by 100 percent. I was previously told by other companies I would only receive a one year warranty. With this company, I received a 5 yr warranty on the part with a 1 year warranty on their work. You can’t go wrong with them!!!"
Kathy K on April 2025
We have years of experience in the business! Here at Hornets Heating & Cooling 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!
"After receiving extremely high estimates to replace the evaporator coil, I finally found a company who doesn’t try to take advantage of people by marking up the costs by 100 percent. I was previously told by other companies I would only receive a one year warranty. With this company, I received a 5 yr warranty on the part with a 1 year warranty on their work. You can’t go wrong with them!!!"
Kathy K on April 2025
Transform Your Space with Expert Handyman and Home Improvement Services! At House Doctors, we believe home maintenance should be done right at every level. We deliver honest, transparent customer service and skilled handyman services priced right because we want to be the best value for homeowners everywhere. Our professional handyman technicians handle an extensive variety of home repair and remodeling services, including everything from carpentry and cabinet installation to painting, and plumbing.
"Chris came out promptly and gave an estimate. We did choose him based on his thoroughness and also his communication as well as previous reviews. Isaiah and Andy came promptly at the time they said they would come and finished several projects that took all day. We had a new back door installed as well as other tedious projects. They kept me informed of the progress and also had me check the work though out the day. I would recommend Chris and his crew."
Blan H on March 2025
Transform Your Space with Expert Handyman and Home Improvement Services! At House Doctors, we believe home maintenance should be done right at every level. We deliver honest, transparent customer service and skilled handyman services priced right because we want to be the best value for homeowners everywhere. Our professional handyman technicians handle an extensive variety of home repair and remodeling services, including everything from carpentry and cabinet installation to painting, and plumbing.
"Chris came out promptly and gave an estimate. We did choose him based on his thoroughness and also his communication as well as previous reviews. Isaiah and Andy came promptly at the time they said they would come and finished several projects that took all day. We had a new back door installed as well as other tedious projects. They kept me informed of the progress and also had me check the work though out the day. I would recommend Chris and his crew."
Blan H on March 2025
With over 8 years if experience we take great pride in the expertise, quality, and customer focused nature of our cleaning services. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to communicate with every client in a professional and timely manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
With over 8 years if experience we take great pride in the expertise, quality, and customer focused nature of our cleaning services. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to communicate with every client in a professional and timely manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
Pro Plumbing Heating & Air is a friendly, full-service, residential plumbing company focused on providing customer satisfaction and punctual, courteous service. For your convenience, we arrive at your home with our "mobile warehouse on wheels." This Pro Plumbing Heating & Air, fleet of super trucks is stocked with a full line of quality parts and products to keep your project moving quickly and on schedule. Our customers also appreciate our flat rate pricing that allows them to know the price upfront, so there are no surprises. To keep your home neat and clean, our Pro Plumbing Heating & Air employees place runners on the floors and wear protective booties.
"Very experience did not follow instruction or do quality work"
David F on October 2024
Pro Plumbing Heating & Air is a friendly, full-service, residential plumbing company focused on providing customer satisfaction and punctual, courteous service. For your convenience, we arrive at your home with our "mobile warehouse on wheels." This Pro Plumbing Heating & Air, fleet of super trucks is stocked with a full line of quality parts and products to keep your project moving quickly and on schedule. Our customers also appreciate our flat rate pricing that allows them to know the price upfront, so there are no surprises. To keep your home neat and clean, our Pro Plumbing Heating & Air employees place runners on the floors and wear protective booties.
"Very experience did not follow instruction or do quality work"
David F on October 2024
Carolina HVAC Service, LLC is a veteran and family-owned business located in Lancaster, SC. We are rapidly growing and proudly serving the Carolinas, with over 25 + years of industry experience. We strive to bring quality and comfort to our surrounding communities. We pride ourselves on our rapid response times and exceptional customer service. For all your AC repair, HVAC service, indoor Air Quality, and installation needs, trust Carolina HVAC Service LLC. Where your comfort is our priority. Contact us today for the highest quality HVAC solutions. "Where Quality meets Comfort."" Serving Lancaster, Chester, York, Union County [NC], Chesterfield, and surrounding counties.
"Great company with great service!"
Clay S on February 2025
Carolina HVAC Service, LLC is a veteran and family-owned business located in Lancaster, SC. We are rapidly growing and proudly serving the Carolinas, with over 25 + years of industry experience. We strive to bring quality and comfort to our surrounding communities. We pride ourselves on our rapid response times and exceptional customer service. For all your AC repair, HVAC service, indoor Air Quality, and installation needs, trust Carolina HVAC Service LLC. Where your comfort is our priority. Contact us today for the highest quality HVAC solutions. "Where Quality meets Comfort."" Serving Lancaster, Chester, York, Union County [NC], Chesterfield, and surrounding counties.
"Great company with great service!"
Clay S on February 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!
"L&J Cooling and Heating did an excellent and efficient job repairing our system. Had been without ac for over a week and they were able to come within 24 hours. Very professional. We recommend their services. "
Dave F on June 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!
"L&J Cooling and Heating did an excellent and efficient job repairing our system. Had been without ac for over a week and they were able to come within 24 hours. Very professional. We recommend their services. "
Dave F on June 2025
Horizon Services, Inc., is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey and Northeastern Maryland. After a quarter of a century in business, Horizons Services, Inc., remains fully committed to setting the industry standard for customer service, installation and focusing on things that are important to busy homeowners.
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Michael G on September 2023
Horizon Services, Inc., is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey and Northeastern Maryland. After a quarter of a century in business, Horizons Services, Inc., remains fully committed to setting the industry standard for customer service, installation and focusing on things that are important to busy homeowners.
"A"
Michael G on September 2023
Consider replacing your gravity furnace when it's over 30 years old, when you experience frequent system failures, or when your heating bills continue rising despite maintenance. Many older gravity systems operate at substantially lower efficiency rates compared to modern alternatives, often 50% to 60% versus the 80% to 98% efficiency of contemporary furnaces.
Replacement also makes sense when your existing system shows signs of deterioration that could affect safety or when professional inspection reveals significant issues.
Most gravity furnace replacements require between six and 12 hours of professional labor, spanning one to two working days, depending on scheduling and complexity. Basic installations with minimal complications may be completed in a single day, while projects requiring extensive ductwork modifications or asbestos remediation will require additional time.
The timeline includes removal of the old system, preparation of the installation area, placement and connection of the new furnace, and thorough testing.
Watch for warning signs, including inconsistent heating throughout your home, unusual noises during operation, visible corrosion or damage to the heat exchanger, and steadily increasing energy consumption. If your furnace requires frequent repairs or if you notice a yellow or flickering pilot light instead of a steady blue flame, these may indicate serious issues.
Age remains a primary consideration—systems over 30 years old warrant replacement rather than continued repair.
Well-maintained gravity furnaces that pass professional safety inspections can continue operating, but they inherently carry more risk factors than modern systems. Potential concerns include less efficient combustion that may produce carbon monoxide, deteriorating components that could create fire hazards, and the possible presence of asbestos in insulation materials.
Modern furnaces incorporate numerous safety improvements, including automatic shutdown features, sealed combustion chambers, and electronic ignition systems that eliminate standing pilot lights.