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Window a/c unit installers in Littleton

Cornell's Brother
8801 W Belleview Ave G203
New on HomeAdvisorNew on Angi
Approved Pro
Cornell's Brother
8801 W Belleview Ave G203
New on AngiNew 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


Avatar for 5280 Heating, Cooling & Refrigeration, LLC
5280 Heating, Cooling & Refrigeration, LLC
5790 W Louisiana Ave
5.00(
3
)
Approved Pro
5280 Heating, Cooling & Refrigeration, LLC
5790 W Louisiana Ave
5.00(
3
)
Approved Pro
8 years of experience
Free onsite estimate

At 5280 Cooling, Heating & Refrigeration, we specialize in fast, affordable, and reliable HVAC repairs, installations, and tune-ups across Lakewood, Westminster, and Aurora, Colorado. Whether your system needs a quick fix, a full replacement, or a seasonal check-up, our licensed HVAC technicians are here to keep your home or business comfortable year-round.​ 5280 Cooling, Heating & Refrigeration is a family-owned and operated company of Colorado natives. We have been doing business In Colorado since 2008, and have over 4 decades of experience in the trade. Our company has a Master Mechanical license, as well as two supervisors’ licenses, and we offer a full spectrum of services. From Commercial and Residential HVAC services to Commercial Refrigeration, we can handle it all. We take pride in our work and strive to make sure that every job, no matter how big or small, is done right the first time.

"Fantastic family owned business. The team at 5280 are always professional, and extremely organized. I would highly recommend them to everyone. "

Felicia F on April 2025

At 5280 Cooling, Heating & Refrigeration, we specialize in fast, affordable, and reliable HVAC repairs, installations, and tune-ups across Lakewood, Westminster, and Aurora, Colorado. Whether your system needs a quick fix, a full replacement, or a seasonal check-up, our licensed HVAC technicians are here to keep your home or business comfortable year-round.​ 5280 Cooling, Heating & Refrigeration is a family-owned and operated company of Colorado natives. We have been doing business In Colorado since 2008, and have over 4 decades of experience in the trade. Our company has a Master Mechanical license, as well as two supervisors’ licenses, and we offer a full spectrum of services. From Commercial and Residential HVAC services to Commercial Refrigeration, we can handle it all. We take pride in our work and strive to make sure that every job, no matter how big or small, is done right the first time.

"Fantastic family owned business. The team at 5280 are always professional, and extremely organized. I would highly recommend them to everyone. "

Felicia F on April 2025


Avatar for Colorado Bear Heating & Air
Colorado Bear Heating & Air
2237 Deer Hollow Tr
5.00(
11
)
Approved Pro
Colorado Bear Heating & Air
2237 Deer Hollow Tr
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more! We are family. We are focused on the needs of our customer base & dedicated to providing our clients with an exceptional service experience, superior to other service providers in our marketplace. Our quick response time, strong communication skills, compassionate drive, and thoroughness sets us apart from other providers.

"they did an excellent job. were knowledgeable and professional."

Mansour R on December 2024

We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more! We are family. We are focused on the needs of our customer base & dedicated to providing our clients with an exceptional service experience, superior to other service providers in our marketplace. Our quick response time, strong communication skills, compassionate drive, and thoroughness sets us apart from other providers.

"they did an excellent job. were knowledgeable and professional."

Mansour R on December 2024


Avatar for Handy Mountain Solutions llc
Handy Mountain Solutions llc
10220 City View Drive
5.00(
11
)
Approved Pro
Handy Mountain Solutions llc
10220 City View Drive
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
73 local quotes requested

I have been helping friends and family preform basic repairs and upgrades to there homes including my own for over 20 years. With a background in Facilities Maintenance, Carpentry and fine wood working I have acquired vast range of valuable skills and take great pride in my work. If your looking for a Handy man that provides outstanding service and beautiful outcomes look no further.

"Jamen was prompt in returning my call for a quote and his prices were very reasonable for installing some ceiling fans. He was thorough and did a great job!"

Cat B on March 2024

I have been helping friends and family preform basic repairs and upgrades to there homes including my own for over 20 years. With a background in Facilities Maintenance, Carpentry and fine wood working I have acquired vast range of valuable skills and take great pride in my work. If your looking for a Handy man that provides outstanding service and beautiful outcomes look no further.

"Jamen was prompt in returning my call for a quote and his prices were very reasonable for installing some ceiling fans. He was thorough and did a great job!"

Cat B on March 2024


Tempcontrol
5943 West Alder Ave.
New on HomeAdvisorNew on Angi
Approved Pro
Tempcontrol
5943 West Alder Ave.
New on AngiNew on HomeAdvisor
Approved Pro
238 local quotes requested
26 years of experience

In Business Since 1999 Quality work, knowledgeable techs, and great prices. At Tempcontrol Heating & Air Conditioning, 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!

In Business Since 1999 Quality work, knowledgeable techs, and great prices. At Tempcontrol Heating & Air Conditioning, 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!


Avatar for Tuscan Electric Heating & Plumbing
Tuscan Electric Heating & Plumbing
4301 S. Federal Blvd
5.00(
15
)
Approved Pro
Tuscan Electric Heating & Plumbing
4301 S. Federal Blvd
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1953 local quotes requested

At Tuscan Electric Heating & Plumbing, we take immense pride in being your trusted local family-owned business, dedicated to delivering excellence in home service. With a commitment to professionalism and a wealth of expertise accumulated, we're here to redefine your experience in electrical, heating, cooling, and plumbing solutions.

"Very good. I plan to hire Jim for some work next month."

Donald G on April 2025

At Tuscan Electric Heating & Plumbing, we take immense pride in being your trusted local family-owned business, dedicated to delivering excellence in home service. With a commitment to professionalism and a wealth of expertise accumulated, we're here to redefine your experience in electrical, heating, cooling, and plumbing solutions.

"Very good. I plan to hire Jim for some work next month."

Donald G on April 2025


Avatar for High 5 Plumbing, Heating, Cooling & Electric
High 5 Plumbing, Heating, Cooling & Electric
15710 W COLFAX AVE
4.69(
75
)
Approved Pro
High 5 Plumbing, Heating, Cooling & Electric
15710 W COLFAX AVE
4.69(
75
)
Approved Pro
Customers say: Quick response
3041 local quotes requested
13 years of experience

If you have any plumbing, heating, cooling or electrical issues at all, contact the experts at High 5 today. We are highly experienced and extensively trained. Using state-of-the-art equipment and a comprehensive understanding of plumbing and HVAC, we handle all of your needs in a timely and professional manner. Whether you need to install, repair, or replace piping, unclog a toilet, replace your ceiling fan, repair an electrical box, install a new air conditioner, need furnace maintenance, or more, they can handle it quickly and efficiently. With High 5, you can count on their expert plumbers, electricians, and HVAC technicians to show up as at your home on time and ready to work. We are well-known among their customers and neighbors for our ethical and honest mode of operation. Many other companies take advantage of their customers’ lack of experience and provide low-quality services at exorbitant rates. At High 5, we've built our business based on honesty, integrity, quality work, and exceptional service at fair pricing. Because of these values, it has allowed us to employ the best of the best in our professional fields. Contact us today and schedule an in-home cost estimate for your plumbing, HVAC or electrical in the Denver area. We proudly offer a Senior Discount and Military Discount of 10% off up to $100.

"The project went smoothly, from the inititial call to setting the date and the actual work. The plumber was friendly and professional and showed up on time. He had all the required parts on his truck and completed the job within 30 minutes. The project rate ended up being in the ballpark of what I expected. It would have been nice to have some idea of the price before they showed up though. This seems to be an overall issue with Angi's list with 5+ vendors wanting to show up at you house before providing an estimate. It's probably the nature of the work..."

Matt B on August 2024

If you have any plumbing, heating, cooling or electrical issues at all, contact the experts at High 5 today. We are highly experienced and extensively trained. Using state-of-the-art equipment and a comprehensive understanding of plumbing and HVAC, we handle all of your needs in a timely and professional manner. Whether you need to install, repair, or replace piping, unclog a toilet, replace your ceiling fan, repair an electrical box, install a new air conditioner, need furnace maintenance, or more, they can handle it quickly and efficiently. With High 5, you can count on their expert plumbers, electricians, and HVAC technicians to show up as at your home on time and ready to work. We are well-known among their customers and neighbors for our ethical and honest mode of operation. Many other companies take advantage of their customers’ lack of experience and provide low-quality services at exorbitant rates. At High 5, we've built our business based on honesty, integrity, quality work, and exceptional service at fair pricing. Because of these values, it has allowed us to employ the best of the best in our professional fields. Contact us today and schedule an in-home cost estimate for your plumbing, HVAC or electrical in the Denver area. We proudly offer a Senior Discount and Military Discount of 10% off up to $100.

"The project went smoothly, from the inititial call to setting the date and the actual work. The plumber was friendly and professional and showed up on time. He had all the required parts on his truck and completed the job within 30 minutes. The project rate ended up being in the ballpark of what I expected. It would have been nice to have some idea of the price before they showed up though. This seems to be an overall issue with Angi's list with 5+ vendors wanting to show up at you house before providing an estimate. It's probably the nature of the work..."

Matt B on August 2024


Avatar for Behold Heating & Cooling Services
Behold Heating & Cooling Services
9800 Mt Pyramid Ct #4040
4.92(
26
)
Approved Pro
Behold Heating & Cooling Services
9800 Mt Pyramid Ct #4040
4.92(
26
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1443 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".

"Excellent, thorough, timely and cost effective"

Meredith F on April 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".

"Excellent, thorough, timely and cost effective"

Meredith F on April 2025


Avatar for Prime Plumbing & Heating Inc
Prime Plumbing & Heating Inc
7000 Broadway
5.00(
7
)
Approved Pro
Prime Plumbing & Heating Inc
7000 Broadway
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1942 local quotes requested

Our pricing is very competitive with other licensed, insured and reputable Denver area plumbing, heating and drain services companies. We offer FREE second opinions on bid jobs with previous bidders written estimates. We specialize in upgrading old water heaters, boilers, and furnaces to new high efficiency models. We also service ALL plumbing and heating issues, big or small. Our sewer and drain services division is a 24/7 operation with no after hours, weekend or holiday extra charges. We offer 10% off for seniors and active duty or military veterans. Nathan Padilla, the owner and a Colorado native, started his plumbing apprenticeship right out of high school in 1998. He was recognized as the Honor Graduate in a class of 60 in a local plumbing apprentice training program. From there he worked for several different plumbing and mechanical contractors in the Denver area. In 2007 he became a Colorado Master Plumber while also obtaining his I.C.C. Master Mechanical certification. In 2012 he decided it was time to go into business for himself. Since 2012 Nathan has been able to establish a good sized and repeat customer base through the company core values of Quality, Integrity and Value.

"Arrived on time. Very clean. Did install and took care of old dishwasher. Price was very reasonable compared to other quotes. Will continue to recommend and use this company."

Teri C on December 2024

Our pricing is very competitive with other licensed, insured and reputable Denver area plumbing, heating and drain services companies. We offer FREE second opinions on bid jobs with previous bidders written estimates. We specialize in upgrading old water heaters, boilers, and furnaces to new high efficiency models. We also service ALL plumbing and heating issues, big or small. Our sewer and drain services division is a 24/7 operation with no after hours, weekend or holiday extra charges. We offer 10% off for seniors and active duty or military veterans. Nathan Padilla, the owner and a Colorado native, started his plumbing apprenticeship right out of high school in 1998. He was recognized as the Honor Graduate in a class of 60 in a local plumbing apprentice training program. From there he worked for several different plumbing and mechanical contractors in the Denver area. In 2007 he became a Colorado Master Plumber while also obtaining his I.C.C. Master Mechanical certification. In 2012 he decided it was time to go into business for himself. Since 2012 Nathan has been able to establish a good sized and repeat customer base through the company core values of Quality, Integrity and Value.

"Arrived on time. Very clean. Did install and took care of old dishwasher. Price was very reasonable compared to other quotes. Will continue to recommend and use this company."

Teri C on December 2024

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Showing 1-10 of 969

Window a/c unit installations FAQs

Running a window air conditioner to cool a small room often costs less than $4 per day, making it cheaper than central air for single-room cooling. However, central air might be more efficient if you're using multiple window units or need to cool a space larger than 1,000 square feet. Choosing the right size AC is crucial—a unit that's too big or small can waste energy and increase costs.

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 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.
A boy changing thermostat’s temperature using a smartphone
Apr 25, 2025
Apr 25, 2025
Budget for AC coil cleaning costs based on factors such as cleaning frequency, coil type, cleaning method, accessibility, ongoing maintenance, and more.
Technician checking AC condenser
Apr 22, 2025
Apr 22, 2025
Budget for the cost to replace an AC condenser based on factors such as unit size, repair type, brand, accessibility, labor, and more.
swamp cooler being installed on roof of house
Apr 21, 2025
Apr 21, 2025
Learn how much a swamp cooler costs to install based on the type, project size, operating costs, removal and disposal fees, and add-ons.
swamp cooler on the exterior of a home
Apr 16, 2025
Apr 16, 2025
Budget for swamp cooler repair costs based on factors such as the type of repair, the type of unit, the parts, potential replacements, labor, and more.
An AC next to a brick wall
Apr 1, 2025
Apr 1, 2025
Budget for AC capacitor replacement costs based on factors such as the capacitor type, size, labor, potential repairs, location, season, and more.
window of home with a window unit air conditioner installed
Mar 31, 2025
Mar 31, 2025
Discover the cost of window AC installation, exploring factors like unit size, labor rates, outlet installation, accessories, and disposal fees.
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