Top-rated window a/c unit installers.

Get matched with top window a/c unit installers in Westminster, CO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Window a/c unit installers in Westminster

Cornell's Brother

8801 W Belleview Ave G203
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Cornell's Brother

8801 W Belleview Ave G203
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
10 years of experience
Free onsite estimate

Cornell's Brothers is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 15 years of experience serving Lakewood, CO and surrounding areas. There is no job too big, or too small for our team. Call today...

Cornell's Brothers is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 15 years of experience serving Lakewood, CO and surrounding areas. There is no job too big, or too small for our team. Call today...


Avatar for Coal Creek Heat, LLC

Coal Creek Heat, LLC

30934 Skyline Drive
5.00(
4
)
Approved Pro

Coal Creek Heat, LLC

30934 Skyline Drive
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

We provide our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems, as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Devin was so professional and knowledgeable. Great company and service!! Highly recommend."

James M on May 2020

We provide our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems, as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Devin was so professional and knowledgeable. Great company and service!! Highly recommend."

James M on May 2020


Huck's Home Repair

East 5th Street
5.00(
33
)
Approved Pro

Huck's Home Repair

East 5th Street
5.00(
33
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
43 local quotes requested

We specialize in handyman services, home repairs, home improvements, painting, ceiling fan installs, TV mounting, and more! We also accept PayPal, Venmo, Zelle, in addition to cash and checks. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Todd is very professional. His estimate was extremelty accurate for supplies and labor. Project was perfectly executed and we are very satisfied. He stayed on budget, schedule and delivered as promised."

Nicky S on July 2025

We specialize in handyman services, home repairs, home improvements, painting, ceiling fan installs, TV mounting, and more! We also accept PayPal, Venmo, Zelle, in addition to cash and checks. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Todd is very professional. His estimate was extremelty accurate for supplies and labor. Project was perfectly executed and we are very satisfied. He stayed on budget, schedule and delivered as promised."

Nicky S on July 2025


Avatar for Emporia Home Services

Emporia Home Services

7901 Shaffer Pkwy
5.00(
16
)
Approved Pro

Emporia Home Services

7901 Shaffer Pkwy
5.00(
16
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1352 local quotes requested

Heating, Cooling & Electrical Services Emporia is committed to keeping you comfortable in your own home with expert service, quality parts and equipment, as well as unique technology designed and assembled with care by our own engineers right here in Colorado. Emporia proudly serves Littleton, Lakewood, and the Denver Metro area with quality Heating, Ventilation, and Air Conditioning (HVAC) solutions. Our goal is to ensure that every customer receives best-of-class service and reliable products, all at the lowest possible price we can offer.

"Techs arrived on time as scheduled. The job was completed in the estimated time and to my satisfaction."

Michael M on March 2023

Heating, Cooling & Electrical Services Emporia is committed to keeping you comfortable in your own home with expert service, quality parts and equipment, as well as unique technology designed and assembled with care by our own engineers right here in Colorado. Emporia proudly serves Littleton, Lakewood, and the Denver Metro area with quality Heating, Ventilation, and Air Conditioning (HVAC) solutions. Our goal is to ensure that every customer receives best-of-class service and reliable products, all at the lowest possible price we can offer.

"Techs arrived on time as scheduled. The job was completed in the estimated time and to my satisfaction."

Michael M on March 2023


Avatar for Quality West Heating & Cooling

Quality West Heating & Cooling

5306 S. Bannock St
4.69(
322
)
Approved Pro

Quality West Heating & Cooling

5306 S. Bannock St
4.69(
322
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
799 local quotes requested

Xcel Energy approved contractor and 9 Year SUPER SERVICE AWARD winner on Angi *** Now offering Heat Pumps, Boilers, Mini Split Ductless Systems, Furnaces, Air Conditioning, Humidification, and Air Quality solutions *** Quality West is currently offering up to $13,750 in rebates and tax credits for qualified heat pumps. Quality West is well known for upfront pricing, clean and friendly technicians, an A+ Rating from the Better Business Bureau and their multitude of "A" ratings for Heat Pump, Furnace, Air Conditioner, and Boiler system replacements and repairs. Call to schedule a FREE ESTIMATE on a new system! Financing programs are available, and options include 18 months no interest or low monthly payment plans (WAC). Locally owned and operated since 2002. The entire staff at Quality West looks forward to being of service to you and your family!

"Great customer service. Responsive to contact. An efficient, clean, courteous, and knowledgeable work crew removed my old furnace and AC condenser then installed a new Bosch gas furnace and heat pump combination with a new Honeywell thermostat and sensors, integrated the control and plumbing of my Aprilaire 600 humidifier. Electrician Installed a new exterior electric power outlet on siding of house next to new heat p***. All this work was done in less than 8 hrs."

Allan W on August 2023

Xcel Energy approved contractor and 9 Year SUPER SERVICE AWARD winner on Angi *** Now offering Heat Pumps, Boilers, Mini Split Ductless Systems, Furnaces, Air Conditioning, Humidification, and Air Quality solutions *** Quality West is currently offering up to $13,750 in rebates and tax credits for qualified heat pumps. Quality West is well known for upfront pricing, clean and friendly technicians, an A+ Rating from the Better Business Bureau and their multitude of "A" ratings for Heat Pump, Furnace, Air Conditioner, and Boiler system replacements and repairs. Call to schedule a FREE ESTIMATE on a new system! Financing programs are available, and options include 18 months no interest or low monthly payment plans (WAC). Locally owned and operated since 2002. The entire staff at Quality West looks forward to being of service to you and your family!

"Great customer service. Responsive to contact. An efficient, clean, courteous, and knowledgeable work crew removed my old furnace and AC condenser then installed a new Bosch gas furnace and heat pump combination with a new Honeywell thermostat and sensors, integrated the control and plumbing of my Aprilaire 600 humidifier. Electrician Installed a new exterior electric power outlet on siding of house next to new heat p***. All this work was done in less than 8 hrs."

Allan W on August 2023


Avatar for Attraction Heating & Cooling

Attraction Heating & Cooling

5.00(
1
)
Approved Pro

Attraction Heating & Cooling

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1359 local quotes requested

In Business Since 2015 Attraction Heating & Cooling 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.

"It went great. Mike and his team where on time, on budget and very professional. Will hire again. Thanks Mike!"

Chuck M on January 2025

In Business Since 2015 Attraction Heating & Cooling 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.

"It went great. Mike and his team where on time, on budget and very professional. Will hire again. Thanks Mike!"

Chuck M on January 2025


Avatar for Otter HVAC Solutions

Otter HVAC Solutions

1607 Glen Bar Drive
5.00(
6
)
Approved Pro

Otter HVAC Solutions

1607 Glen Bar Drive
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
417 local quotes requested

In Business Since 2024 Otter HVAC Solutions 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. How We Got Started I chose to work in this industry because Hi there— I’m Mitch Atwell, HVAC and Boiler Technician with over 15 years experience installing and repairing systems. I’m also an Eagle Scout! I’ve worked at all levels of the industry and can help you make the best decisions for your home. I’m here to help you keep the heat on, get some AC, and make your life more comfortable for a comfortable price. Please reach out with any questions!. We started in this industry in 2012. We describe our business as Family owned and operated

"Mitch had it all planned out and was in and out. We now have endless hot water!"

Brad l on February 2025

In Business Since 2024 Otter HVAC Solutions 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. How We Got Started I chose to work in this industry because Hi there— I’m Mitch Atwell, HVAC and Boiler Technician with over 15 years experience installing and repairing systems. I’m also an Eagle Scout! I’ve worked at all levels of the industry and can help you make the best decisions for your home. I’m here to help you keep the heat on, get some AC, and make your life more comfortable for a comfortable price. Please reach out with any questions!. We started in this industry in 2012. We describe our business as Family owned and operated

"Mitch had it all planned out and was in and out. We now have endless hot water!"

Brad l on February 2025


Avatar for Lion Home Service

Lion Home Service

4868 Innovation Dr
4.45(
78
)
Approved Pro

Lion Home Service

4868 Innovation Dr
4.45(
78
)
Approved Pro
Customers say: Super punctual
1410 local quotes requested
16 years of experience

Lion Home Service is setting a new standard of excellence in the industry. We specialize in prompt service, quality fixes, and a reliable response that you can trust. We take pride in our reputation and have built our business one satisfied customer at a time. Whether you need an emergency repair, regular maintenance, or have a project you are planning, we are your total home solution. Service Delivered With Pride! Heating, Cooling, Electrical, Plumbing, Drain Cleaning, Septic, Roofing, Gutters, Indoor Air Quality and MORE! Look for the Home Service company offering the best service and guarantees to ensure your repair or service is done correctly the first time! 100% SATISFACTION GUARANTEE- We agree to accept responsibility for your complete satisfaction with the materials we use and the workmanship we provide. During the first year, if you are dissatisfied with our service or our people for any reason, we will do whatever it takes to make it right and correct the problem to your satisfaction. Additional Guarantees- We Value Your Safety- No Blame Game-We Value Your Time-Apples to Apples -Workmanship

"DO NOT USE THIS COMPANY. Please look at the YELP or BBB complaints, they are much more akin to what I experienced. They are certainly manipulating the Google reviews. I hired Lion to do a simple cleaning/certifying of our HVAC units as part of a sale. I was initially quoted $119, and I verified no less than 3 times with the customer service rep that the price would include cleaning and testing. When our tech showed up, he said we were misquoted and the charge for cleaning and testing would be about $450, as it was part of their "maintenance" package. They very reluctantly cut us a "deal" for just over $300. Not only was zero cleaning done, the tech did not perform a single action that could be classified as "maintenance." What we got was a diagnostic and estimate for repairs and replacement. I called to complain twice before someone finally got back to me. I was told that the tech didn't perform the cleaning because it may have damaged the unit, which was clearly a lie because the tech never told me that and actually gave me a quote to perform the AC coil cleaning, $470 (what a deal!). The rep then told me that a simple cleaning was done, but not the deep clean that I was expecting. I asked that my invoice be revised to reflect that, but was quickly blocked. Yes, they actually blocked my number after repeatedly misrepresenting both the price and work. I was shocked. I filed a complaint with the BBB, of which I discovered there are many. Hopefully they do the right thing and just give me a refund, but I won't hold my breath. Again, they are clearly manipulating their reviews on Google. Customers do your research!"

Dylan N on May 2025

Lion Home Service is setting a new standard of excellence in the industry. We specialize in prompt service, quality fixes, and a reliable response that you can trust. We take pride in our reputation and have built our business one satisfied customer at a time. Whether you need an emergency repair, regular maintenance, or have a project you are planning, we are your total home solution. Service Delivered With Pride! Heating, Cooling, Electrical, Plumbing, Drain Cleaning, Septic, Roofing, Gutters, Indoor Air Quality and MORE! Look for the Home Service company offering the best service and guarantees to ensure your repair or service is done correctly the first time! 100% SATISFACTION GUARANTEE- We agree to accept responsibility for your complete satisfaction with the materials we use and the workmanship we provide. During the first year, if you are dissatisfied with our service or our people for any reason, we will do whatever it takes to make it right and correct the problem to your satisfaction. Additional Guarantees- We Value Your Safety- No Blame Game-We Value Your Time-Apples to Apples -Workmanship

"DO NOT USE THIS COMPANY. Please look at the YELP or BBB complaints, they are much more akin to what I experienced. They are certainly manipulating the Google reviews. I hired Lion to do a simple cleaning/certifying of our HVAC units as part of a sale. I was initially quoted $119, and I verified no less than 3 times with the customer service rep that the price would include cleaning and testing. When our tech showed up, he said we were misquoted and the charge for cleaning and testing would be about $450, as it was part of their "maintenance" package. They very reluctantly cut us a "deal" for just over $300. Not only was zero cleaning done, the tech did not perform a single action that could be classified as "maintenance." What we got was a diagnostic and estimate for repairs and replacement. I called to complain twice before someone finally got back to me. I was told that the tech didn't perform the cleaning because it may have damaged the unit, which was clearly a lie because the tech never told me that and actually gave me a quote to perform the AC coil cleaning, $470 (what a deal!). The rep then told me that a simple cleaning was done, but not the deep clean that I was expecting. I asked that my invoice be revised to reflect that, but was quickly blocked. Yes, they actually blocked my number after repeatedly misrepresenting both the price and work. I was shocked. I filed a complaint with the BBB, of which I discovered there are many. Hopefully they do the right thing and just give me a refund, but I won't hold my breath. Again, they are clearly manipulating their reviews on Google. Customers do your research!"

Dylan N on May 2025


Avatar for My Sons Fences And Landscape Contractors LLC

My Sons Fences And Landscape Contractors LLC

679 S Reed Ct
5.00(
9
)
Approved Pro

My Sons Fences And Landscape Contractors LLC

679 S Reed Ct
5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
726 local quotes requested

Is your current landscape losing its charm, or are you in search of the perfect landscaping idea to elevate your home’s aesthetics? Look no further because we are the Colorado Landscaping Company you want to handle your next landscaping project. Here at My Son’s Landscaping & Fencing, we are a team of experienced Colorado Landscaping experts specializing in breathing new life into outdoor spaces in Colorado. Our expertise covers landscape construction all types of fences, patios, decks, lawns, backyards, and gardens. Big or small projects we got you covered!

"I’m thoroughly impressed by the professionalism and work product of My Sons Fences and Landscape. They built me a gorgeous custom fence that has quickly held up against record snowfall and hurricane force winds. Ulises and his crew were a pleasure to work with - responsive, timely, great communication and follow-up, and excellent results. I will certainly hire them again for other projects. I highly recommend their services. I couldn’t be more pleased with how my fence turned out!!"

Nina P on April 2024

Is your current landscape losing its charm, or are you in search of the perfect landscaping idea to elevate your home’s aesthetics? Look no further because we are the Colorado Landscaping Company you want to handle your next landscaping project. Here at My Son’s Landscaping & Fencing, we are a team of experienced Colorado Landscaping experts specializing in breathing new life into outdoor spaces in Colorado. Our expertise covers landscape construction all types of fences, patios, decks, lawns, backyards, and gardens. Big or small projects we got you covered!

"I’m thoroughly impressed by the professionalism and work product of My Sons Fences and Landscape. They built me a gorgeous custom fence that has quickly held up against record snowfall and hurricane force winds. Ulises and his crew were a pleasure to work with - responsive, timely, great communication and follow-up, and excellent results. I will certainly hire them again for other projects. I highly recommend their services. I couldn’t be more pleased with how my fence turned out!!"

Nina P on April 2024


Avatar for Behold Heating & Cooling Services

Behold Heating & Cooling Services

9800 Mt Pyramid Ct #4040
4.94(
31
)
Approved Pro

Behold Heating & Cooling Services

9800 Mt Pyramid Ct #4040
4.94(
31
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1907 local quotes requested

Behold the Difference! Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference! "Unfortunately we do not service or intall swamp or evaporative coolers".

"The customer service is incredible! Ask for Jay! He sent us a team of technicians (Dylan,Chris,Tristan & Hunter) who were very professional, knowledgeable, friendly and efficient. They got the job done in one day! They also made sure everything was working properly and that we understood how it all worked. Easy to get a hold of and great service."

Loretta O on July 2025

Behold the Difference! Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference! "Unfortunately we do not service or intall swamp or evaporative coolers".

"The customer service is incredible! Ask for Jay! He sent us a team of technicians (Dylan,Chris,Tristan & Hunter) who were very professional, knowledgeable, friendly and efficient. They got the job done in one day! They also made sure everything was working properly and that we understood how it all worked. Easy to get a hold of and great service."

Loretta O on July 2025

...
Showing 1-10 of 975
FAQs for window a/c unit installation projects in Westminster, CO

Window AC units can use a significant amount of energy. These units use about 12 to 17 kilowatt-hours per day, significantly more than a refrigerator's one to 1.5 kilowatt-hours per day. To keep your energy costs down, run your window AC only when necessary, keep doors closed to contain the cool air, regularly clean filters and coils, and seal any gaps around the unit to prevent cold air from escaping.

Inexpensive air conditioner units are often not worth it. Low-cost products from popular brands like General Electric, LG, Whirlpool, or Frigidaire may be a reasonable investment. However, putting a small, budget-friendly unit in a large room wastes energy and shortens the life span of the AC since it has to draw more power and work much harder to cool the space. The unit will consume more energy and stress the motor and other internal parts, resulting in early breakdown and costly repairs.

The best deals on window AC units come during the fall when businesses slash prices to clear out old inventory. You can also speak with your local AC installer, who may get you a good deal on a window AC unit since they have access to trade pricing. You can also watch for discontinued products and flash sales in your area.

Window AC repair costs between $110 and $390, with most people paying around $250. Parts cost between $2 and $150, with the rest going toward labor, at around $30 per hour. The occasional one-off repair or a routine AC tuneup cost $75 to $200. Servicing can keep your AC running in good condition for several more years before you need to pay for a replacement unit.

Window AC units last eight to 10 years when installed and maintained correctly. High-quality models last up to 20 years with proper care and routine maintenance. The unit’s longevity depends on its construction quality, regular cleaning, and electrical safety inspections. Keeping the filters and coils clean and addressing minor repairs promptly extends its effective performance and ensures reliable cooling.

The Westminster, CO homeowners’ guide to window a/c unit installations

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

  • Technician repairing air conditioner

    HomeAdvisor's Air Conditioning Repair Cost Guide gives the average price to fix an AC unit in your house. Find the cost of recharging the AC or fixing a freon leak. Get the price to repair or replace a compressor, handler, thermostat, duct, and more.

  • An AC system in the backyard of a house

    This guide explores the average cost of replacing your AC compressor and all of the factors that go into it, including size, type, and brand.

  • Detail of a HVAC system outside a brick house

    The cost of replacing an AC unit fan motor depends on warranties, labor, season, and more. This cost guide covers everything you need to know about this HVAC part.