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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 VersaPros Handyworks
VersaPros Handyworks
191 University Boulevard
5.00(
6
)
Approved Pro
VersaPros Handyworks
191 University Boulevard
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1089 local quotes requested

VersaPros Handyworks has over 25 years of experience related to many areas of renovation and building processes as well as water and fire proofing qualifications. We specialize in providing the highest quality at a rate that won't crush the budget. We crush the competition, not your budget!

"He arrived on time and was very professional completed the work timely cleaning up afterwards. Showed concern double checking to make sure everything was to my satisfaction. Will definitely use his services for more work. Very trustworthy."

Kathy B on October 2024

VersaPros Handyworks has over 25 years of experience related to many areas of renovation and building processes as well as water and fire proofing qualifications. We specialize in providing the highest quality at a rate that won't crush the budget. We crush the competition, not your budget!

"He arrived on time and was very professional completed the work timely cleaning up afterwards. Showed concern double checking to make sure everything was to my satisfaction. Will definitely use his services for more work. Very trustworthy."

Kathy B on October 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
72 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


Avatar for Rahat LLC
Rahat LLC
5.00(
3
)
Approved Pro
Rahat LLC
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

At Rahat LLC, we are your go-to solution for all things home improvement and repair. Whether it’s a small fix or a major renovation, our team of skilled and reliable handymen is here to tackle any project with precision, care, and efficiency. We believe that no task is too big or small—if it needs fixing, building, or updating, we’re ready to help. Give us a call or click for a quick estimate today!

"Maq was quick to respond and was able to complete the task in the quoted time allotted. He even took some time to look into a potential future job and established if it was doable and offer to get us a quote when we are ready to move forward."

Jeremy E on January 2025

At Rahat LLC, we are your go-to solution for all things home improvement and repair. Whether it’s a small fix or a major renovation, our team of skilled and reliable handymen is here to tackle any project with precision, care, and efficiency. We believe that no task is too big or small—if it needs fixing, building, or updating, we’re ready to help. Give us a call or click for a quick estimate today!

"Maq was quick to respond and was able to complete the task in the quoted time allotted. He even took some time to look into a potential future job and established if it was doable and offer to get us a quote when we are ready to move forward."

Jeremy E on January 2025


Avatar for Viking Inc. Heating, A/C & Misc. Plumbing, Inc.
Viking Inc. Heating, A/C & Misc. Plumbing, Inc.
3746 Lincoln Ave
4.70(
10
)
Approved Pro
Viking Inc. Heating, A/C & Misc. Plumbing, Inc.
3746 Lincoln Ave
4.70(
10
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
128 local quotes requested

Family owned & operated for over 35 yrs. Honest & reliable heating and A/C which includes repair and service of all brand furnaces, boilers and A/C. New installation of furnaces, boilers & A/C. Humidifiers, water heaters, air cleaners and misc. plumbing issues. Install new gas lines for adding stoves, driers etc.; New construction

"Viking had serviced my furnaces and air conditioners in the past. Price was a little high but work was satisfactory. This year, I called four times and used their web site over a six week period to try to schedule a service appointment for the air conditioners. Although I was always told their scheduler would get back to me they never did. A big waste of my time and past money trying to establish a service relationship I could count on. I gave them a "D": rather than an "F" as their call service at least answered all though that was it."

Bruce M on July 2020

Family owned & operated for over 35 yrs. Honest & reliable heating and A/C which includes repair and service of all brand furnaces, boilers and A/C. New installation of furnaces, boilers & A/C. Humidifiers, water heaters, air cleaners and misc. plumbing issues. Install new gas lines for adding stoves, driers etc.; New construction

"Viking had serviced my furnaces and air conditioners in the past. Price was a little high but work was satisfactory. This year, I called four times and used their web site over a six week period to try to schedule a service appointment for the air conditioners. Although I was always told their scheduler would get back to me they never did. A big waste of my time and past money trying to establish a service relationship I could count on. I gave them a "D": rather than an "F" as their call service at least answered all though that was it."

Bruce M on July 2020


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
285 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 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
501 local quotes requested

9 Year SUPER SERVICE AWARD winner on Angie's List! *** Heat Pumps, Boilers, Mini Split Ductless Systems, Furnace, Air Conditioning, Humidification, Air Quality*** They are Xcel Energy Approved Contractors and participate in Xcel Energy Rebates and Denver Climate Action Rebates. Upfront pricing, clean and friendly technicians, an A+ Rating from the Better Business Bureau! Quality West is well known for their multitude of "A" ratings for Furnace, Air Conditioners, and Boiler system replacements and repair. Call to schedule a FREE ESTIMATE on a new system! Financing programs are available, and options include 12 Months No Payments/No Interest - Same As Cash, or Low Monthly Payment Plans (with approved credit). 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

9 Year SUPER SERVICE AWARD winner on Angie's List! *** Heat Pumps, Boilers, Mini Split Ductless Systems, Furnace, Air Conditioning, Humidification, Air Quality*** They are Xcel Energy Approved Contractors and participate in Xcel Energy Rebates and Denver Climate Action Rebates. Upfront pricing, clean and friendly technicians, an A+ Rating from the Better Business Bureau! Quality West is well known for their multitude of "A" ratings for Furnace, Air Conditioners, and Boiler system replacements and repair. Call to schedule a FREE ESTIMATE on a new system! Financing programs are available, and options include 12 Months No Payments/No Interest - Same As Cash, or Low Monthly Payment Plans (with approved credit). 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 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
1448 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

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Showing 1-10 of 962

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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