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Window a/c unit installers in Dover

Avatar for Heritage Home Service
Heritage Home Service
179 Lafayette Rd
5.00(
9
)
Approved Pro
Heritage Home Service
179 Lafayette Rd
5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
256 local quotes requested

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Maine – bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service.

"Ryan Boulanger was quite professional and comfortable to work with as he did the annual maintenance review of my Alpine burner. He explained the work he needed to do and what he did with knowledge and understanding and helped me to understand. Thanks for your work, Ryan."

David H on May 2023

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Maine – bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service.

"Ryan Boulanger was quite professional and comfortable to work with as he did the annual maintenance review of my Alpine burner. He explained the work he needed to do and what he did with knowledge and understanding and helped me to understand. Thanks for your work, Ryan."

David H on May 2023


All Natural Landscaping
5.00(
5
)
Approved Pro
All Natural Landscaping
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
37 local quotes requested

All Natural Landscaping is a seasonal residential/commercial lawn care service offering outdoor services along the seacoast of Maine/New Hampshire. All Natural Landscaping has been providing excellent customer service and superior craftsmanship for 10 Years. Whether its weeding your gardens beds to designing & installing your landscape. You have made the right choice by calling All Natural Landscaping.

"Truly outstanding team with a wonderful positive, cheerful attitude. Great job every week. Strongly recommend!"

Andrew g on September 2022

All Natural Landscaping is a seasonal residential/commercial lawn care service offering outdoor services along the seacoast of Maine/New Hampshire. All Natural Landscaping has been providing excellent customer service and superior craftsmanship for 10 Years. Whether its weeding your gardens beds to designing & installing your landscape. You have made the right choice by calling All Natural Landscaping.

"Truly outstanding team with a wonderful positive, cheerful attitude. Great job every week. Strongly recommend!"

Andrew g on September 2022


Avatar for DeSantis Heating and Cooling
DeSantis Heating and Cooling
44 Hall Rd
5.00(
4
)
Approved Pro
DeSantis Heating and Cooling
44 Hall Rd
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
624 local quotes requested

***WE DO NOT SERVICE HOT WATER** DeSantis heating and cooling is a family owned business. We have 23 years of business and still going strong. We specialize in whole house hvac installs and mini split installs.

"DeSantis heating saved me over 8000 dollars. A previous company told me I needed a new furnace after 15 minutes DeSantis repaired it on the existing furnace costing me 79 dollars."

Gary B on December 2024

***WE DO NOT SERVICE HOT WATER** DeSantis heating and cooling is a family owned business. We have 23 years of business and still going strong. We specialize in whole house hvac installs and mini split installs.

"DeSantis heating saved me over 8000 dollars. A previous company told me I needed a new furnace after 15 minutes DeSantis repaired it on the existing furnace costing me 79 dollars."

Gary B on December 2024


Avatar for Done Right Handyman Service
Done Right Handyman Service
4.00(
12
)
Approved Pro
Done Right Handyman Service
4.00(
12
)
Approved Pro
Customers say: Terrific value
547 local quotes requested
13 years of experience

Family owned handyman services. Licensed and fully insured. Quality workmanship. We guarantee it is done right the first time.

"Could not have been a worse experience. Hired to replace door hardware (knobs and hinges). Simple job for anyone. I was told by owner that "they'll make everything perfect ". Expected a few hours...it took two guys four hours by which time I just wanted them out. Checked things as they were working and pointed out multiple problems along the way. English communication was clearly not working. They did not know how to adjust doors by bending hinges (the correct way) and instead pounded on the door jams and sunk visible three-inch screws into one to adjust it. The front door was the worst and needed the doorknob hole enlarged by 1/8 inch. The solution was to use a Sawzall on both the knob and deadbolt holes - I wish I could attach photos here!! Ruined the door. It can never have a standard round knob again because of the hack job. Told owner, scheduled appointment. He didn't show and didn’t respond to texts. Small Claims Court is next to replace the front door. Don’t hire!"

David E on February 2025

Family owned handyman services. Licensed and fully insured. Quality workmanship. We guarantee it is done right the first time.

"Could not have been a worse experience. Hired to replace door hardware (knobs and hinges). Simple job for anyone. I was told by owner that "they'll make everything perfect ". Expected a few hours...it took two guys four hours by which time I just wanted them out. Checked things as they were working and pointed out multiple problems along the way. English communication was clearly not working. They did not know how to adjust doors by bending hinges (the correct way) and instead pounded on the door jams and sunk visible three-inch screws into one to adjust it. The front door was the worst and needed the doorknob hole enlarged by 1/8 inch. The solution was to use a Sawzall on both the knob and deadbolt holes - I wish I could attach photos here!! Ruined the door. It can never have a standard round knob again because of the hack job. Told owner, scheduled appointment. He didn't show and didn’t respond to texts. Small Claims Court is next to replace the front door. Don’t hire!"

David E on February 2025


davis construction
New on HomeAdvisorNew on Angi
Approved Pro
davis construction
New on AngiNew on HomeAdvisor
Approved Pro
245 local quotes requested
2 years of experience

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business, we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business, we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!


Avatar for Heritage Home Service
Heritage Home Service
28 Commercial Ct
4.03(
454
)
Approved Pro
Heritage Home Service
28 Commercial Ct
4.03(
454
)
Approved Pro
Customers say: Super punctual
1075 local quotes requested
39 years of experience

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Paul, our service technician, was timely, knowledgeable, and efficient. I can highly recommend Heritage Home service on this account. However I am extremely unhappy with the company's new service plan offered. I will explore other providers for this reason, and may not use Heritage Home Service in the future."

Craig V on November 2024

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Paul, our service technician, was timely, knowledgeable, and efficient. I can highly recommend Heritage Home service on this account. However I am extremely unhappy with the company's new service plan offered. I will explore other providers for this reason, and may not use Heritage Home Service in the future."

Craig V on November 2024


Avatar for Granite Guardian Property Maintenance
Granite Guardian Property Maintenance
60 Hunter Drive
5.00(
7
)
Approved Pro
Granite Guardian Property Maintenance
60 Hunter Drive
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
508 local quotes requested

We are a full service Property Management and Maintenance company with over 50 Years of experience. We can help out with any handyman and home maintenance needed. Call -or- click to schedule a free estimate today!

"Chad and his crew are the best. They went above and beyond to fix my house. The crew did an excellent job on a really challenging project at the same time were polite, kind and addressed all my needs I will never hire anyone else for any work I may need."

Marie F on March 2024

We are a full service Property Management and Maintenance company with over 50 Years of experience. We can help out with any handyman and home maintenance needed. Call -or- click to schedule a free estimate today!

"Chad and his crew are the best. They went above and beyond to fix my house. The crew did an excellent job on a really challenging project at the same time were polite, kind and addressed all my needs I will never hire anyone else for any work I may need."

Marie F on March 2024


Avatar for Busby Home Services
Busby Home Services
8 Abundance Way
5.00(
7
)
Approved Pro
Busby Home Services
8 Abundance Way
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
251 local quotes requested

Owned and operated by Ryan Busby in Alfred, Maine, Busby Home Services is dedicated to keeping your house looking and functioning great. I pride myself on clear communication, attention to detail, and caring for your home like it was my own. I will ensure your task is done with care in a timely manner. Don’t risk damage to your home or injury to yourself trying to DIY. Contact us today to schedule an appointment and enjoy the peace of mind that comes with a clean, well-maintained home!

"Ryan did excellent work! He is meticulous in his approach to his work, diligently paying attention to details. He is an excellent craftsman and a great individual! He presents as highly professional and genuine!"

Carole S on April 2025

Owned and operated by Ryan Busby in Alfred, Maine, Busby Home Services is dedicated to keeping your house looking and functioning great. I pride myself on clear communication, attention to detail, and caring for your home like it was my own. I will ensure your task is done with care in a timely manner. Don’t risk damage to your home or injury to yourself trying to DIY. Contact us today to schedule an appointment and enjoy the peace of mind that comes with a clean, well-maintained home!

"Ryan did excellent work! He is meticulous in his approach to his work, diligently paying attention to details. He is an excellent craftsman and a great individual! He presents as highly professional and genuine!"

Carole S on April 2025


Avatar for Freedom Air Mechanical
Freedom Air Mechanical
150 Mount Hope Rd
4.77(
13
)
Approved Pro
Freedom Air Mechanical
150 Mount Hope Rd
4.77(
13
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
567 local quotes requested

As a Veteran owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. With attention to detail and a great work ethic your project is in good hands. We work with you to make sure the end result meets your needs. Our work is done with integrity, and it will show in the completion of your project. We are an Efficiency Maine Registered Contractor and are also a contractor for the NEIF. We install heat pumps low temp or standard temp applications. We use manufacturers such as Mitsubishi, Gree or Daikin. These systems can provide low temp heating options down to -22 degrees! We provide installations of Hybrid Water Heaters, Gas and or Oil fired boiler replacements. We also offer Warm air furnace replacements and central ac replacements. Anything hvac/r related we can do. With over 23 years in the field residential/commercial our techs can handle any project. Give us a call at 207-849-0238 or check out our website freedomairhvacr.com to schedule a free estimate today!

"Diagnosed the problem and repaired in a timely manner"

Jim H on July 2024

As a Veteran owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. With attention to detail and a great work ethic your project is in good hands. We work with you to make sure the end result meets your needs. Our work is done with integrity, and it will show in the completion of your project. We are an Efficiency Maine Registered Contractor and are also a contractor for the NEIF. We install heat pumps low temp or standard temp applications. We use manufacturers such as Mitsubishi, Gree or Daikin. These systems can provide low temp heating options down to -22 degrees! We provide installations of Hybrid Water Heaters, Gas and or Oil fired boiler replacements. We also offer Warm air furnace replacements and central ac replacements. Anything hvac/r related we can do. With over 23 years in the field residential/commercial our techs can handle any project. Give us a call at 207-849-0238 or check out our website freedomairhvacr.com to schedule a free estimate today!

"Diagnosed the problem and repaired in a timely manner"

Jim H on July 2024


RM Remodel and Repair
123 Old Post Rd
4.50(
16
)
Approved Pro
RM Remodel and Repair
123 Old Post Rd
4.50(
16
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
233 local quotes requested

RM Contracting provides customers with quality products and services with a wide variety of ideas to save on money and products and services to each job at hand .

"Always goes well. Rich takes it upon himself to do the right thing(s)."

Mike . on September 2023

RM Contracting provides customers with quality products and services with a wide variety of ideas to save on money and products and services to each job at hand .

"Always goes well. Rich takes it upon himself to do the right thing(s)."

Mike . on September 2023

...
Showing 1-10 of 378

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
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