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Find Thermostat installers and replacers in Alexandria

Mayday HVAC, LLC

5.00(
3
)
Approved Pro

Mayday HVAC, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Mayday HVAC 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.

"Provided great service when it was an emergency at my mothers house and got here AC back up and running right away and was also able to service my unit same day. He showed me exactly what was wrong and was very honest and fair with the pricing and repairs. Saved my mother a lot of money!!! He definitely has a customer for life with me. His knowledge and professionalism is excellent!!!! I would recommend him to anyone!"

Mesay B on March 2024

Mayday HVAC 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.

"Provided great service when it was an emergency at my mothers house and got here AC back up and running right away and was also able to service my unit same day. He showed me exactly what was wrong and was very honest and fair with the pricing and repairs. Saved my mother a lot of money!!! He definitely has a customer for life with me. His knowledge and professionalism is excellent!!!! I would recommend him to anyone!"

Mesay B on March 2024


Avatar for X&M Heating and Cooling

X&M Heating and Cooling

5.00(
5
)
Approved Pro

X&M Heating and Cooling

5.00(
5
)
Approved Pro
Customers say: Quick response
2 years of experience
Free onsite estimate

MASTER HVAC License We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"We had an absolutely fantastic experience with X&M Heating and Cooling! From start to finish, Richard was beyond responsive, professional, and genuinely a pleasure to work with. You don’t always expect replacing major home systems to feel stress-free, but Richard made the whole process smooth and even enjoyable. They replaced our AC/Furnace (Condenser, Coil Pack, and Heater) as well as our hot water tank—a big job—and the crew knocked it out of the park. Everything was installed with care, attention to detail, and a clear pride in their workmanship. Richard took the time to explain what was happening every step of the way, which gave us total peace of mind. What stood out most, though, was the responsiveness. Whenever I had a question, Richard was quick to answer, patient, and genuinely friendly—it felt like working with a trusted neighbor rather than just a contractor. If you’re looking for a team that does top-notch work - don't look any further."

Joe L on September 2025

MASTER HVAC License We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"We had an absolutely fantastic experience with X&M Heating and Cooling! From start to finish, Richard was beyond responsive, professional, and genuinely a pleasure to work with. You don’t always expect replacing major home systems to feel stress-free, but Richard made the whole process smooth and even enjoyable. They replaced our AC/Furnace (Condenser, Coil Pack, and Heater) as well as our hot water tank—a big job—and the crew knocked it out of the park. Everything was installed with care, attention to detail, and a clear pride in their workmanship. Richard took the time to explain what was happening every step of the way, which gave us total peace of mind. What stood out most, though, was the responsiveness. Whenever I had a question, Richard was quick to answer, patient, and genuinely friendly—it felt like working with a trusted neighbor rather than just a contractor. If you’re looking for a team that does top-notch work - don't look any further."

Joe L on September 2025


"I’ve been a loyal Snell customer for years, but this recent experience was deeply disappointing. After our AC failed in August, Snell diagnosed a leaking evaporator coil. We chose to replace the system through them, and the salesperson took time to evaluate the setup in advance. However, on installation day, the crew arrived without the correct ductwork and had to make adjustments on the fly. Unfortunately, the adjustments were poorly executed: • The Aprilaire humidifier was mounted on sloped ductwork rather than a level surface, contrary to manufacturer specifications. • The hole for the humidifier was cut inaccurately. • The drain line was left kinked in multiple places. Aprilaire support later confirmed the humidifier was not installed correctly and warned this could lead to water backing up into the system — a concern I had raised with the installers before they left. Despite multiple follow-up attempts, I received no meaningful response. I was told my concerns would be escalated, but no one followed through. This was a major investment, and I now feel I need to bring in another HVAC team to correct issues that should have been resolved from the start. I’ve recommended Snell in the past, but I can’t in good faith do so now after this experience."

Will H on September 2025

Family owned & operated. Financing available. Credit cards. All work done by experienced professionals to ensure consistent high quality. Award winning company at your service.

"I’ve been a loyal Snell customer for years, but this recent experience was deeply disappointing. After our AC failed in August, Snell diagnosed a leaking evaporator coil. We chose to replace the system through them, and the salesperson took time to evaluate the setup in advance. However, on installation day, the crew arrived without the correct ductwork and had to make adjustments on the fly. Unfortunately, the adjustments were poorly executed: • The Aprilaire humidifier was mounted on sloped ductwork rather than a level surface, contrary to manufacturer specifications. • The hole for the humidifier was cut inaccurately. • The drain line was left kinked in multiple places. Aprilaire support later confirmed the humidifier was not installed correctly and warned this could lead to water backing up into the system — a concern I had raised with the installers before they left. Despite multiple follow-up attempts, I received no meaningful response. I was told my concerns would be escalated, but no one followed through. This was a major investment, and I now feel I need to bring in another HVAC team to correct issues that should have been resolved from the start. I’ve recommended Snell in the past, but I can’t in good faith do so now after this experience."

Will H on September 2025


Avatar for Powerhouse Homeimprovement

Powerhouse Homeimprovement

5.00(
9
)
Approved Pro

Powerhouse Homeimprovement

5.00(
9
)
Approved Pro
Customers say: Quick response
6 years of experience
Free onsite estimate

Quality work and attention to detail and affordable prices. We are dedicated to providing good customer service to homeowners so that they are happy. Please see some of the services we offer below and call -or- click to schedule a free estimate today!

"Great Experience – Highly Recommend Power House Home Improvement provided excellent service at a very reasonable price. He was patient, responsive to my questions, and flexible with scheduling. He arrived as planned, and when we had to reschedule due to a broken furniture part I discovered during unboxing, he was completely understanding. Once the replacement part arrived, he responded quickly and returned to complete the job. The entire furniture assembly was finished in under two hours and done efficiently and professionally. I would absolutely use him again and highly recommend his services."

LaFondras P on January 2026

Quality work and attention to detail and affordable prices. We are dedicated to providing good customer service to homeowners so that they are happy. Please see some of the services we offer below and call -or- click to schedule a free estimate today!

"Great Experience – Highly Recommend Power House Home Improvement provided excellent service at a very reasonable price. He was patient, responsive to my questions, and flexible with scheduling. He arrived as planned, and when we had to reschedule due to a broken furniture part I discovered during unboxing, he was completely understanding. Once the replacement part arrived, he responded quickly and returned to complete the job. The entire furniture assembly was finished in under two hours and done efficiently and professionally. I would absolutely use him again and highly recommend his services."

LaFondras P on January 2026


Avatar for M.E. Flow

M.E. Flow

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

M.E. Flow

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
38 local quotes requested
75 years of experience

M.E. Flow offers FREE in-home consultations for replacement HVAC systems and we are an authorized dealer of most major brands. Established in 1951 by Millard Edward Flow we remain family owned. Replacing your HVAC system and water heater is a big investment. When you go with M.E. Flow your satisfaction is guaranteed. We do not install customer supplied equipment, do new construction, or give quotes over the phone. We send a professional home comfort advisor to your home--even meet you after hours. During your home visit we will design you the perfect system, answer all your questions, and get your system in the family budget. Financing and/or rebates are typically available. Qualified Staff: You get a team of professionals, NATE certification means your getting the best. Company employees are required to pass a background investigation which include a criminal records check and drug testing. We also offer the best guarantees.

M.E. Flow offers FREE in-home consultations for replacement HVAC systems and we are an authorized dealer of most major brands. Established in 1951 by Millard Edward Flow we remain family owned. Replacing your HVAC system and water heater is a big investment. When you go with M.E. Flow your satisfaction is guaranteed. We do not install customer supplied equipment, do new construction, or give quotes over the phone. We send a professional home comfort advisor to your home--even meet you after hours. During your home visit we will design you the perfect system, answer all your questions, and get your system in the family budget. Financing and/or rebates are typically available. Qualified Staff: You get a team of professionals, NATE certification means your getting the best. Company employees are required to pass a background investigation which include a criminal records check and drug testing. We also offer the best guarantees.


Avatar for DHL Handyman

DHL Handyman

5.00(
5
)
Approved Pro

DHL Handyman

5.00(
5
)
Approved Pro
Super Service Award
Customers say: Quick response
6 years of experience

I’m David, your trusted handyman in Annandale, VA. I came to this profession from a different angle than most. Prior to getting into handyman work, I spent fifteen years working in the engine rooms of cargo ships. Being in the middle of the ocean taught me to face problems head-on: I was an electrician, plumber, machinist, welder, and even an appliance repairman. If the right part was missing, I adapted—fixing what was at hand, crafting a new part, or finding an alternative solution. This drive to find solutions has not changed. While today’s world often leans towards a “throw out-and-replace” mindset, I have always gravitated towards mending and restoring. My commitment is simple: to deliver the best service possible. And if a task is beyond my scope of expertise or needs specialized knowledge, I will always be honest about it. In my opinion, it is better to steer you in the right direction than to lead you off course.

"Good, was pleased"

David L on August 2025

I’m David, your trusted handyman in Annandale, VA. I came to this profession from a different angle than most. Prior to getting into handyman work, I spent fifteen years working in the engine rooms of cargo ships. Being in the middle of the ocean taught me to face problems head-on: I was an electrician, plumber, machinist, welder, and even an appliance repairman. If the right part was missing, I adapted—fixing what was at hand, crafting a new part, or finding an alternative solution. This drive to find solutions has not changed. While today’s world often leans towards a “throw out-and-replace” mindset, I have always gravitated towards mending and restoring. My commitment is simple: to deliver the best service possible. And if a task is beyond my scope of expertise or needs specialized knowledge, I will always be honest about it. In my opinion, it is better to steer you in the right direction than to lead you off course.

"Good, was pleased"

David L on August 2025


Avatar for CIC

CIC

5.00(
18
)
Approved Pro

CIC

5.00(
18
)
Approved Pro
Super Service Award
Customers say: Quick response
12 local quotes requested
2 years of experience

Our mission is to be a handyman that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"They applied great due diligence in finding the right spot on the wall to fix my wooden wall mount for bike. Job done quick and efficiently. "

Mahesh p on January 2026

Our mission is to be a handyman that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"They applied great due diligence in finding the right spot on the wall to fix my wooden wall mount for bike. Job done quick and efficiently. "

Mahesh p on January 2026


Avatar for Elements Of Energy L.L.C.

Elements Of Energy L.L.C.

5.00(
17
)
Approved Pro

Elements Of Energy L.L.C.

5.00(
17
)
Approved Pro
Super Service Award
Customers say: Quick response
10 local quotes requested
4 years of experience

We provide services to homeowners and businesses throughout Northern Virginia, Washington D.C. and Maryland. We spend time during each call asking questions to fully assess the situation, and are usually able to determine the best course of action before we send a truck out to your home or business. We’ve been in the business of employing the most knowledgeable, professional, attentive, and courteous electricians in all of “DMV”. It’s our attention to service and quality, Each appointment made with one of our clients is set up by one of our experienced electricians.

"Job well done. Reasonable prices, I will keep using for future projects."

Red B on December 2025

We provide services to homeowners and businesses throughout Northern Virginia, Washington D.C. and Maryland. We spend time during each call asking questions to fully assess the situation, and are usually able to determine the best course of action before we send a truck out to your home or business. We’ve been in the business of employing the most knowledgeable, professional, attentive, and courteous electricians in all of “DMV”. It’s our attention to service and quality, Each appointment made with one of our clients is set up by one of our experienced electricians.

"Job well done. Reasonable prices, I will keep using for future projects."

Red B on December 2025


Avatar for Zee Servicing LLC

Zee Servicing LLC

5.00(
1
)
Approved Pro

Zee Servicing LLC

5.00(
1
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

We are specialized in all type of maintenance, repairs, and remodeling, plumbing, drywall, painting and carpentry projects in DMV area. Our expert handyman are always ready around the clock to handle all of your needs on timely and professional manner. Zee Servicing LLC also do basement framing, kitchen and bathroom remodeling too.

"Did work in a timely fashion."

Roz S on July 2025

We are specialized in all type of maintenance, repairs, and remodeling, plumbing, drywall, painting and carpentry projects in DMV area. Our expert handyman are always ready around the clock to handle all of your needs on timely and professional manner. Zee Servicing LLC also do basement framing, kitchen and bathroom remodeling too.

"Did work in a timely fashion."

Roz S on July 2025


Avatar for Daniel & Sons Services

Daniel & Sons Services

4.78(
27
)
Approved Pro

Daniel & Sons Services

4.78(
27
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
21 years of experience

Daniel & Sons Services is a locally owned and operated company with over 14 years of business experience. We’re the smartest and fastest handyman service in the Falls Church area because of our wide range of services offered at very competitive rates. We’re quick at fixing your problems while handling each project with great care. We specialize in paint and stain projects, replacing water heaters and pumps, drywall repair, and small remodeling projects. We’re proud to use products and equipment by the Sherwin-Williams Company and gladly service Falls Church, Arlington, McLean, Merrifield, Springfield, Vienna, Alexandria, Fairfax, Manassas, and more. Contact us today if you want a professional job done at an affordable cost! Hours of operation listed below excludes holidays and increment weather.

"They are the hardest workers I have ever seen, as well as being very efficient, quiet, very pleasant... a real pleasure to have in my home. the exterior of the house is so well patched you'd never know a tree had fallen on it. Final job; the at least 50 year old cabinets look absolutely gorgeous. I am activeley seeking more projects for them to do. It's been a real pleasure and a totally amazing result. Thank you Daniel and Sons"

ROGER E on October 2025

Daniel & Sons Services is a locally owned and operated company with over 14 years of business experience. We’re the smartest and fastest handyman service in the Falls Church area because of our wide range of services offered at very competitive rates. We’re quick at fixing your problems while handling each project with great care. We specialize in paint and stain projects, replacing water heaters and pumps, drywall repair, and small remodeling projects. We’re proud to use products and equipment by the Sherwin-Williams Company and gladly service Falls Church, Arlington, McLean, Merrifield, Springfield, Vienna, Alexandria, Fairfax, Manassas, and more. Contact us today if you want a professional job done at an affordable cost! Hours of operation listed below excludes holidays and increment weather.

"They are the hardest workers I have ever seen, as well as being very efficient, quiet, very pleasant... a real pleasure to have in my home. the exterior of the house is so well patched you'd never know a tree had fallen on it. Final job; the at least 50 year old cabinets look absolutely gorgeous. I am activeley seeking more projects for them to do. It's been a real pleasure and a totally amazing result. Thank you Daniel and Sons"

ROGER E on October 2025

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FAQs for thermostat installation and replacement projects in Alexandria, VA

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 Alexandria, VA homeowners’ guide to thermostat installations and replacements

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