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Thermostat installers and replacers in Lawrenceville

Unlimited Heating and Air Conditioning, LLC

421 Mary Todd Place
4.94(
9
)
Approved Pro

Unlimited Heating and Air Conditioning, LLC

421 Mary Todd Place
4.94(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
14 years of experience

Unlimited Heating and Air Conditioning, LLC, is an HVAC company providing residential heating, air service & repairs throughout the surrounding areas. We specialize in heating and air conditioning repairs, service,and installations as well. When it comes to your family, your air conditioning and heating systems should provide you with value as well as comfort. With Unlimited Heating and Air Conditioning, LLC, you can expect comfort, value, and dedicated customer service to meet your needs.

"Unlimited Heating and Air Conditioning was great in every way."

Bobby M on August 2018

Unlimited Heating and Air Conditioning, LLC, is an HVAC company providing residential heating, air service & repairs throughout the surrounding areas. We specialize in heating and air conditioning repairs, service,and installations as well. When it comes to your family, your air conditioning and heating systems should provide you with value as well as comfort. With Unlimited Heating and Air Conditioning, LLC, you can expect comfort, value, and dedicated customer service to meet your needs.

"Unlimited Heating and Air Conditioning was great in every way."

Bobby M on August 2018


"Super professional and very experienced and went over and above the project to assist my situation."

Nick D on October 2021

with over 6 yrs. of experience in working with HVAC/R company's. I am excellent with customer service and getting to the problem.

"Super professional and very experienced and went over and above the project to assist my situation."

Nick D on October 2021


Grace Maintenance Service MEP LLC

3289 Powder Springs Road
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Grace Maintenance Service MEP LLC

3289 Powder Springs Road
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
14 years of experience
Free onsite estimate

GRACE MAINTENANCE SERVICES 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.

GRACE MAINTENANCE SERVICES 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.


Avatar for Hill HVAC, LLC

Hill HVAC, LLC

2374 Greenway Dr.
4.96(
53
)
Approved Pro

Hill HVAC, LLC

2374 Greenway Dr.
4.96(
53
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
7 years of experience

Hill HVAC is an owner operated repair and maintenance service. I am intent on getting your system fixed and earning your business. No nonsense or up selling. 15 yrs experience commercial and residential installation and troubleshooting. Call me directly 7702415023 anytime for estimates or advice.

"He fix the wiring and was helpful."

L F on December 2023

Hill HVAC is an owner operated repair and maintenance service. I am intent on getting your system fixed and earning your business. No nonsense or up selling. 15 yrs experience commercial and residential installation and troubleshooting. Call me directly 7702415023 anytime for estimates or advice.

"He fix the wiring and was helpful."

L F on December 2023


Avatar for Prime Heating & Air LLC

Prime Heating & Air LLC

5155 Bowers Brook Dr
5.00(
4
)
Approved Pro

Prime Heating & Air LLC

5155 Bowers Brook Dr
5.00(
4
)
Approved Pro
8 years of experience
Free onsite estimate

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. Call us today!

"Prime was excellent. They had our new unit installed within the time frame specified and followed up with us over the next few days to make sure it was working properly. "

JL H on July 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. Call us today!

"Prime was excellent. They had our new unit installed within the time frame specified and followed up with us over the next few days to make sure it was working properly. "

JL H on July 2025


Avatar for Trend Mechanical LLC

Trend Mechanical LLC

653 Arbor Rdg
4.90(
10
)
Approved Pro

Trend Mechanical LLC

653 Arbor Rdg
4.90(
10
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
717 local quotes requested

Trend mechanical LLC heating &A/C has provided owners in the Walton & Gwinnett area with high quality, professionals repair for years. We are licensed, insured ventilation, heating and air conditioning contractor with years of experience working with all types, brands and models heating and air conditioners.we can handle the installation, repairs, service and maintenance work for any HVAC system.

"Trend Mechanical did an amazing job. They were very transparent, and communication throughout the whole process was great. They were affordable and timely compared to the competition. I highly recommend them."

J H on August 2024

Trend mechanical LLC heating &A/C has provided owners in the Walton & Gwinnett area with high quality, professionals repair for years. We are licensed, insured ventilation, heating and air conditioning contractor with years of experience working with all types, brands and models heating and air conditioners.we can handle the installation, repairs, service and maintenance work for any HVAC system.

"Trend Mechanical did an amazing job. They were very transparent, and communication throughout the whole process was great. They were affordable and timely compared to the competition. I highly recommend them."

J H on August 2024


Avatar for Casteel Heating, Cooling, Plumbing & Electrical

Casteel Heating, Cooling, Plumbing & Electrical

778 PETTY RD
4.74(
88
)
Approved Pro

Casteel Heating, Cooling, Plumbing & Electrical

778 PETTY RD
4.74(
88
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1706 local quotes requested

At Casteel Heating, Cooling, Plumbing and Electrical, we provide world-class service to our customers, just as we have since 1987. Founded by Jan and Bob Casteel, our company was built on honesty and customer-focused care. To this day, we offer our Amazing Care Guarantee: We’ll take amazing care of you or we’ll refund your service call fee. Our expert team of plumbers, electricians, HVAC technicians, and system design managers performs top-quality repairs and installations while ensuring you are completely satisfied with your entire customer service. Because we offer so many services under one roof, you’ll save time and money by making one phone call to Casteel. Formerly: Knight Air Conditioning and Heating Company

"The heating was fixed but I am very unhappy about the pricing and lack of transparency. The service technician tried to upsell me a $200 safety valve that I “absolutely needed” (but online said should be able to be installed for less than $50 and was just another added feature to shut off the AC if the drain was clogged). The technician said he would not charge me for the repair on my dampener but I got a $40 charge anyways after refusing to pay for the safety valve, which I said I would buy myself. When I had spoken with Casteel on the phone the night before, they said the $40 charge would be for a second HVAC unit, which ultimately did not get serviced. I never received a detailed explanation of these charges and instead said this was a “miscellaneous fee” for repairs. They got the job done but I do not think I would hire again solely because I felt like I was being taken advantage of for most of the visit. I could not get the $40 charge removed after calling Casteel and explaining the situation. So it was a $129 service call with no parts replaced more expensive than other providers."

Shihua L on March 2019

At Casteel Heating, Cooling, Plumbing and Electrical, we provide world-class service to our customers, just as we have since 1987. Founded by Jan and Bob Casteel, our company was built on honesty and customer-focused care. To this day, we offer our Amazing Care Guarantee: We’ll take amazing care of you or we’ll refund your service call fee. Our expert team of plumbers, electricians, HVAC technicians, and system design managers performs top-quality repairs and installations while ensuring you are completely satisfied with your entire customer service. Because we offer so many services under one roof, you’ll save time and money by making one phone call to Casteel. Formerly: Knight Air Conditioning and Heating Company

"The heating was fixed but I am very unhappy about the pricing and lack of transparency. The service technician tried to upsell me a $200 safety valve that I “absolutely needed” (but online said should be able to be installed for less than $50 and was just another added feature to shut off the AC if the drain was clogged). The technician said he would not charge me for the repair on my dampener but I got a $40 charge anyways after refusing to pay for the safety valve, which I said I would buy myself. When I had spoken with Casteel on the phone the night before, they said the $40 charge would be for a second HVAC unit, which ultimately did not get serviced. I never received a detailed explanation of these charges and instead said this was a “miscellaneous fee” for repairs. They got the job done but I do not think I would hire again solely because I felt like I was being taken advantage of for most of the visit. I could not get the $40 charge removed after calling Casteel and explaining the situation. So it was a $129 service call with no parts replaced more expensive than other providers."

Shihua L on March 2019


Avatar for Armato Heating and Air

Armato Heating and Air

3180 Florence Rd.
5.00(
12
)
Approved Pro

Armato Heating and Air

3180 Florence Rd.
5.00(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2554 local quotes requested

HVAC Installation Experts - Armato Heating and Air With over 25 years of dedicated experience in HVAC installations, Armato Heating and Air has established itself as a trusted name in the Atlanta metro region. As an exclusive Daikin dealer, we proudly offer industry-leading HVAC solutions that ensure the highest quality & comfort, and efficiency for your home. Our team of HVAC installation experts is committed to delivering professional, reliable, and top-tier service. Whether you want to upgrade your existing HVAC system, replace an outdated unit, or install a new heating and cooling system, we have the expertise and skills to get the job done right the first time. At Armato Heating and Air, we specialize in installing high-efficiency Daikin HVAC systems, which are renowned for their innovative technology and exceptional performance. Our exclusive partnership with Daikin offers some of the most comprehensive warranty packages, giving you peace of mind and long-lasting comfort. Ask your HVAC designer about the available rebates & our 12/12/12 WARRANTY! We take pride in providing our clients with customized HVAC solutions that fit their unique needs and preferences. From residential HVAC installations to commercial projects, our certified technicians use the latest tools and techniques to ensure optimal performance and energy savings. Choose Armato Heating and Air for your next HVAC installation and experience the difference that quality and experience can make. Contact us today to schedule a consultation or learn more about our Daikin products and services!

"Brent from Armato heating and air gave me a deal.I could not refuse 12years parts, service , maintenance. Unbeatable deal. Daikin is a an efficient quiet quality heat pump. Great price. Also tax credit. This is the best system I have owned. I gave it. Three weeks before I left my review to make sure it worked well. The installation team were top notch. They were on time neat knowledgeable and quick. Definitely the A team. Which is one of the most important things about getting a new heat pump is the installation. If you don't get a Daikin from Brent @ Armato heating and air. Your making a huge mistake."

Anthony M on April 2025

HVAC Installation Experts - Armato Heating and Air With over 25 years of dedicated experience in HVAC installations, Armato Heating and Air has established itself as a trusted name in the Atlanta metro region. As an exclusive Daikin dealer, we proudly offer industry-leading HVAC solutions that ensure the highest quality & comfort, and efficiency for your home. Our team of HVAC installation experts is committed to delivering professional, reliable, and top-tier service. Whether you want to upgrade your existing HVAC system, replace an outdated unit, or install a new heating and cooling system, we have the expertise and skills to get the job done right the first time. At Armato Heating and Air, we specialize in installing high-efficiency Daikin HVAC systems, which are renowned for their innovative technology and exceptional performance. Our exclusive partnership with Daikin offers some of the most comprehensive warranty packages, giving you peace of mind and long-lasting comfort. Ask your HVAC designer about the available rebates & our 12/12/12 WARRANTY! We take pride in providing our clients with customized HVAC solutions that fit their unique needs and preferences. From residential HVAC installations to commercial projects, our certified technicians use the latest tools and techniques to ensure optimal performance and energy savings. Choose Armato Heating and Air for your next HVAC installation and experience the difference that quality and experience can make. Contact us today to schedule a consultation or learn more about our Daikin products and services!

"Brent from Armato heating and air gave me a deal.I could not refuse 12years parts, service , maintenance. Unbeatable deal. Daikin is a an efficient quiet quality heat pump. Great price. Also tax credit. This is the best system I have owned. I gave it. Three weeks before I left my review to make sure it worked well. The installation team were top notch. They were on time neat knowledgeable and quick. Definitely the A team. Which is one of the most important things about getting a new heat pump is the installation. If you don't get a Daikin from Brent @ Armato heating and air. Your making a huge mistake."

Anthony M on April 2025


Avatar for Triad Mechanical Company Inc

Triad Mechanical Company Inc

393 Swanson Dr
4.84(
185
)
Approved Pro

Triad Mechanical Company Inc

393 Swanson Dr
4.84(
185
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1105 local quotes requested

While many heating and air companies have come and gone, we have maintained an impeccable reputation since 1991, which we have accomplished through hard work and unparalleled customer service. We pride ourselves on punctuality, courtesy to our customers and their families, and a rock solid guarantee on all the work we perform. This family-owned and -operated HVAC service has responded promptly to calls in the Greater Metro Atlanta area for more than 20 years, offering the best value from certified technicians. While many heating and air companies have come and gone, we have maintained an impeccable reputation, which we have accomplished through hard work and unparalleled customer service. We pride ourselves on punctuality, courtesy to our customers and their families, and a rock solid guarantee on all the work we perform. Additional Counties Served: Oglethorpe, Walton, Gwinnett, Rockdale, & Portions of Dekalb, & Fulton. Additional phone - (770) 400-9084.

"No findings, no solution, no explanation… collected the fee… the issue is still there. I had Triad Mechanical Company for our HVAC issue that the outdoor unit is not running. I told Paul, the assigned technician, that we had tried resetting the power to the outdoor unit but that only brought the unit back on running for a few days before it stopped running again. I asked Paul’s help diagnose the issue for the root cause. However, when I came to the property just a few minutes later than Paul, he told me that he had done his work already, well, by simply resetting the power to the unit! (although I told him that we already tried that but it didn’t work!)… He didn’t have the patience to explain to me what diagnosis he had done (within that a few minutes) and he didn’t even bother to come off his truck to show me but saying “go ask your tenant”. He collected the fee and left. I will never trust nor use Triad Mechanical Company again!"

Zhentao H on April 2024

While many heating and air companies have come and gone, we have maintained an impeccable reputation since 1991, which we have accomplished through hard work and unparalleled customer service. We pride ourselves on punctuality, courtesy to our customers and their families, and a rock solid guarantee on all the work we perform. This family-owned and -operated HVAC service has responded promptly to calls in the Greater Metro Atlanta area for more than 20 years, offering the best value from certified technicians. While many heating and air companies have come and gone, we have maintained an impeccable reputation, which we have accomplished through hard work and unparalleled customer service. We pride ourselves on punctuality, courtesy to our customers and their families, and a rock solid guarantee on all the work we perform. Additional Counties Served: Oglethorpe, Walton, Gwinnett, Rockdale, & Portions of Dekalb, & Fulton. Additional phone - (770) 400-9084.

"No findings, no solution, no explanation… collected the fee… the issue is still there. I had Triad Mechanical Company for our HVAC issue that the outdoor unit is not running. I told Paul, the assigned technician, that we had tried resetting the power to the outdoor unit but that only brought the unit back on running for a few days before it stopped running again. I asked Paul’s help diagnose the issue for the root cause. However, when I came to the property just a few minutes later than Paul, he told me that he had done his work already, well, by simply resetting the power to the unit! (although I told him that we already tried that but it didn’t work!)… He didn’t have the patience to explain to me what diagnosis he had done (within that a few minutes) and he didn’t even bother to come off his truck to show me but saying “go ask your tenant”. He collected the fee and left. I will never trust nor use Triad Mechanical Company again!"

Zhentao H on April 2024


Jones Climate Control

3230 Hwy 42 N
4.00(
13
)
Approved Pro

Jones Climate Control

3230 Hwy 42 N
4.00(
13
)
Approved Pro
Customers say: Terrific value
2192 local quotes requested
39 years of experience

Locally owned & operated North American Technician Excellence (NATE) Certified. Licensed for commercial and residentail heating and air in the State of Georgia License Cn209727.

"Great service and fast response time. Very pleased and will definitely be using Jones Climate Control again in the future."

Jessica T on June 2022

Locally owned & operated North American Technician Excellence (NATE) Certified. Licensed for commercial and residentail heating and air in the State of Georgia License Cn209727.

"Great service and fast response time. Very pleased and will definitely be using Jones Climate Control again in the future."

Jessica T on June 2022

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FAQs for thermostat installation and replacement projects in Lawrenceville, GA

Smart thermostats may be worth it for many homeowners. They come with various features, including voice control and smartphone apps. Vacation mode can help lower energy usage when you’re out of town for an extended period. Alert warnings let you know about major spikes or drops in temperature. Smartphone apps can track energy usage, and smart thermostats can learn your routine over time to adjust your temperature and reduce wasted energy consumption automatically.

You typically do not need more than one smart thermostat. While it’s common to see multiple mechanical thermostats throughout a large home, multiple smart thermostats may try to override each other. This can lead to problems with the HVAC system. Ensure the unit you buy has the option for dual- or multi-zoned systems to avoid compatibility issues.

Installing a programmable or smart thermostat may save you $180 per year in utility costs. A big part of this comes from a smart thermostat’s ability to learn and adapt to your regular routines. With smartphone apps or web-based interfaces, you also have the option to control your thermostat when you’re not home.

The Lawrenceville, GA homeowners’ guide to thermostat installations and replacements

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

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