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Window a/c unit installers in Castle Rock

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 5280 Heating, Cooling & Refrigeration, LLC
5280 Heating, Cooling & Refrigeration, LLC
5790 W Louisiana Ave
5.00(
4
)
Approved Pro
5280 Heating, Cooling & Refrigeration, LLC
5790 W Louisiana Ave
5.00(
4
)
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.

"Where do I begin! 5280 Heating, Cooling & Refrigeration has been extremely professional since day one. I have been dealing with Cody Jr since the beginning of the AC condenser install. He was VERY professional and communitive during the whole process. The other companies' mis diagnosed my issue and quoted me WAY more than 5280 did. Cody, Rick AND Jacob all assessed on how to remove my old AC condenser, removal of my a-coil and disposed of it. They proceeded to install my new condenser and Cody explained to me on what they were doing on each step and overall, it was a GREAT experience that I had with ANY outside vendor. I 100% recommend their services to any home owner! Cody was a real delight to deal with and put not only myself, but my wife at ease with the work completion that they did. Thank you, Cody and your company 5280 Heating, Cooling & Refrigeration on replacing and installing my AC unit."

Estevan L 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.

"Where do I begin! 5280 Heating, Cooling & Refrigeration has been extremely professional since day one. I have been dealing with Cody Jr since the beginning of the AC condenser install. He was VERY professional and communitive during the whole process. The other companies' mis diagnosed my issue and quoted me WAY more than 5280 did. Cody, Rick AND Jacob all assessed on how to remove my old AC condenser, removal of my a-coil and disposed of it. They proceeded to install my new condenser and Cody explained to me on what they were doing on each step and overall, it was a GREAT experience that I had with ANY outside vendor. I 100% recommend their services to any home owner! Cody was a real delight to deal with and put not only myself, but my wife at ease with the work completion that they did. Thank you, Cody and your company 5280 Heating, Cooling & Refrigeration on replacing and installing my AC unit."

Estevan L on April 2025


Avatar for Wild Water Plumbing Heating and Cooling
Wild Water Plumbing Heating and Cooling
7731 Dry Willow Way
5.00(
11
)
Approved Pro
Wild Water Plumbing Heating and Cooling
7731 Dry Willow Way
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
868 local quotes requested

At Wild Water Plumbing, Heating and Cooling we provide free estimates with no trip fees. We're a locally owned small business, proudly staffed by fully licensed technicians. We look forward to serving you.

"Professional. Good at explaining and investigating. Good work. Fair prices."

David B on March 2025

At Wild Water Plumbing, Heating and Cooling we provide free estimates with no trip fees. We're a locally owned small business, proudly staffed by fully licensed technicians. We look forward to serving you.

"Professional. Good at explaining and investigating. Good work. Fair prices."

David B on March 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 Tipping Hat Plumbing, Heating & Electric
Tipping Hat Plumbing, Heating & Electric
608 Garrison St
3.90(
107
)
Approved Pro
Tipping Hat Plumbing, Heating & Electric
608 Garrison St
3.90(
107
)
Approved Pro
Customers say: Super punctual
2774 local quotes requested
19 years of experience

Here at Tipping Hat Plumbing, Heating & Electric our focus is Good Old Fashioned Service. Plumbing, Heating, Cooling, Drain Cleaning and Electric service that is done right, that will last and skillfully completed by one of our hard working, courteous service specialists.

"Very expensive. $600/hr labor cost. Just got a quote today for plumbing and electrical. 2 days of electrical work quoted for $10,000. 4 days of plumbing work quoted for $20,000 Cost of materials is for all work combined is probably $1,000. Roughly that makes $600/hr. That is simply outrageous."

Rudy Y on April 2024

Here at Tipping Hat Plumbing, Heating & Electric our focus is Good Old Fashioned Service. Plumbing, Heating, Cooling, Drain Cleaning and Electric service that is done right, that will last and skillfully completed by one of our hard working, courteous service specialists.

"Very expensive. $600/hr labor cost. Just got a quote today for plumbing and electrical. 2 days of electrical work quoted for $10,000. 4 days of plumbing work quoted for $20,000 Cost of materials is for all work combined is probably $1,000. Roughly that makes $600/hr. That is simply outrageous."

Rudy Y on April 2024


Avatar for Peak Home Performance
Peak Home Performance
1125 N. Newport Road
4.08(
13
)
Approved Pro
Peak Home Performance
1125 N. Newport Road
4.08(
13
)
Approved Pro
Customers say: Quality work
760 local quotes requested
6 years of experience

Since day one, we’ve been dedicated to providing our community with a level of service in HVAC that just doesn’t currently exist. Over 30 years of experience. Their former experience of operating a successful HVAC company led to them opening Peak Home Performance with a passion and dedication unseen in our area.

"They were professional and helped us solve the problem."

Joy and Matt R on January 2025

Since day one, we’ve been dedicated to providing our community with a level of service in HVAC that just doesn’t currently exist. Over 30 years of experience. Their former experience of operating a successful HVAC company led to them opening Peak Home Performance with a passion and dedication unseen in our area.

"They were professional and helped us solve the problem."

Joy and Matt R on January 2025


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
1477 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 Sanders & Johnson Inc
Sanders & Johnson Inc
7100 N Broadway
4.76(
127
)
Approved Pro
Sanders & Johnson Inc
7100 N Broadway
4.76(
127
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
1654 local quotes requested

Hometown Heating and Air Conditioning Here at Sanders & Johnson, Inc. Heating and Air Conditioning we have been providing Denver with heating and air conditioning services since 1977. We offer a full range of heating and air conditioning services from installations to repairs. Our team here at Sanders & Johnson like to live by the motto of honest work for honest prices, and we will never try to pressure you into any expensive products or services you don’t need. Interested in learning more about what Sanders & Johnson, Inc. Heating and Air Conditioning can do for you? Give us a call today at (720) 547-3828 and speak with one of our highly skilled HVAC technicians. Why Choose Sanders & Johnson At Sanders & Johnson we have 47 years of experience managing heating and air conditioning problems of all sizes. It doesn’t matter if you simply need to get a filter cleaned out or if you want to install a brand new high-efficiency furnace and smart thermostat, we can do it all. Our installation estimates have always been and will always be free. As one of the few Denver HVAC companies still owned and operated by individuals and not investors, Sanders & Johnson knows just how important each and every customer is. Without you the customer we wouldn’t be able to do what we love, because of this we guarantee that we’ll never try to pressure you into expensive parts or services that you don’t need. Give us a call today for your free installation estimate at 303-422-6606. An HVAC contractor in Denver you can count on is a quick phone call away!

"Alex was our tech and had an awesome attitude and approach to our issue. Appreciated him working quickly to diagnose and then commence on the repair."

Brianna Z on June 2023

Hometown Heating and Air Conditioning Here at Sanders & Johnson, Inc. Heating and Air Conditioning we have been providing Denver with heating and air conditioning services since 1977. We offer a full range of heating and air conditioning services from installations to repairs. Our team here at Sanders & Johnson like to live by the motto of honest work for honest prices, and we will never try to pressure you into any expensive products or services you don’t need. Interested in learning more about what Sanders & Johnson, Inc. Heating and Air Conditioning can do for you? Give us a call today at (720) 547-3828 and speak with one of our highly skilled HVAC technicians. Why Choose Sanders & Johnson At Sanders & Johnson we have 47 years of experience managing heating and air conditioning problems of all sizes. It doesn’t matter if you simply need to get a filter cleaned out or if you want to install a brand new high-efficiency furnace and smart thermostat, we can do it all. Our installation estimates have always been and will always be free. As one of the few Denver HVAC companies still owned and operated by individuals and not investors, Sanders & Johnson knows just how important each and every customer is. Without you the customer we wouldn’t be able to do what we love, because of this we guarantee that we’ll never try to pressure you into expensive parts or services that you don’t need. Give us a call today for your free installation estimate at 303-422-6606. An HVAC contractor in Denver you can count on is a quick phone call away!

"Alex was our tech and had an awesome attitude and approach to our issue. Appreciated him working quickly to diagnose and then commence on the repair."

Brianna Z on June 2023


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
131 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 TACTIHVAC LLC
TACTIHVAC LLC
6485 Lazy Stream Way
5.00(
5
)
Approved Pro
TACTIHVAC LLC
6485 Lazy Stream Way
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
401 local quotes requested

TactiHvac: Tactical Comfort, Mission Accomplished At TactiHvac, we don’t just fix heating and cooling systems—we’re on a mission to save your home from the perils of bad air. Based in Colorado Springs, Jesse Joseph and his crew of HVAC commandos specialize in precise diagnostics, tactical repairs, and flawless installations for residential heating and cooling systems. Think of us as the special forces of climate control: no air too dusty, no furnace too fried, and no AC too ancient to escape our expertise. Armed with 47 years of combined industry experience and a commitment to delivering top Residential HVAC equiptment like Rheem, Weather King and Sure Comfort systems; we don’t just bring the heat (or the chill); we bring peace of mind to you and your family, for decades to come. What makes us different? When the heat shuts off and things go bump in the night; We're the team that runs toward the sound of squeaky furnaces and suspicious noises in the basement and attics, not away from them. Whether it’s an AC add-on, a furnace swap, or a total system overhaul, TactiHvac operates with tactical precision and a practical approach for your family and your wallet. You'll get top-tier service without the runaround because we value your comfort—and your time. As proud supporters of our veterans, we’ve partnered with the American Warrior Initiative to replace furnaces for elderly and disabled vets. This isn’t just a job; it’s a chance to give back to the community we love. So, if your HVAC system is waving the white flag, call TactiHvac at (719) 425-3799. We’ll be there faster than you can say, “Why is my house so cold?"

"Jesse & Josh, Are very professional, they take the time to go over everything with you before starting the work. VETERAN friendly Company with very competitive rates. After trying several other BIG Companies here in town I chose TACTI HVAC and will choose them again. HIGHLY RECOMMEND!"

BIG SGT LLC Jonathon N on November 2024

TactiHvac: Tactical Comfort, Mission Accomplished At TactiHvac, we don’t just fix heating and cooling systems—we’re on a mission to save your home from the perils of bad air. Based in Colorado Springs, Jesse Joseph and his crew of HVAC commandos specialize in precise diagnostics, tactical repairs, and flawless installations for residential heating and cooling systems. Think of us as the special forces of climate control: no air too dusty, no furnace too fried, and no AC too ancient to escape our expertise. Armed with 47 years of combined industry experience and a commitment to delivering top Residential HVAC equiptment like Rheem, Weather King and Sure Comfort systems; we don’t just bring the heat (or the chill); we bring peace of mind to you and your family, for decades to come. What makes us different? When the heat shuts off and things go bump in the night; We're the team that runs toward the sound of squeaky furnaces and suspicious noises in the basement and attics, not away from them. Whether it’s an AC add-on, a furnace swap, or a total system overhaul, TactiHvac operates with tactical precision and a practical approach for your family and your wallet. You'll get top-tier service without the runaround because we value your comfort—and your time. As proud supporters of our veterans, we’ve partnered with the American Warrior Initiative to replace furnaces for elderly and disabled vets. This isn’t just a job; it’s a chance to give back to the community we love. So, if your HVAC system is waving the white flag, call TactiHvac at (719) 425-3799. We’ll be there faster than you can say, “Why is my house so cold?"

"Jesse & Josh, Are very professional, they take the time to go over everything with you before starting the work. VETERAN friendly Company with very competitive rates. After trying several other BIG Companies here in town I chose TACTI HVAC and will choose them again. HIGHLY RECOMMEND!"

BIG SGT LLC Jonathon N on November 2024

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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.
professional installing home humidifier system
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Budget for AC evaporator coil replacement costs based on factors such as your AC unit’s tonnage, coil style, professional labor rates, and more.
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Budget for AC coil cleaning costs based on factors such as cleaning frequency, coil type, cleaning method, accessibility, ongoing maintenance, and more.
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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
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