20 Best Window Companies in Chapel Hill, NC (2024 Reviews)

When you need to replace your windows, our reviews of the top window installation companies can help you find the right provider for you.

We analyzed all the top-rated window companies in Chapel Hill and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated February 01, 2024

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

The EcoWatch Reviews team is all about finding solutions for eco-conscious homeowners in Chapel Hill. If you have old or damaged windows, your AC or heating system could be working overtime to heat or cool your home. This means higher energy bills.

That’s not great for either your wallet or the environment, but one of the best window installation companies can help you with that.

We’ve compiled a list of the top installation companies to help you in your research, so you can not only enjoy brand-new windows, but also save money on your energy bills.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Buy 2 Windows, Get 2 Free
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best Window Installation & Replacement Companies in Chapel Hill

The EcoWatch team evaluated dozens of installers that serve the Chapel Hill area to find the top window installation companies that fit our standards. We assessed the companies based on energy-efficient offerings, local experience, coverage area, customer service, price and more.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World offers windows expertise in Chapel Hill. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of experience in the window installation sector. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider picking Window World if you're looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.

Energy Efficiency of Window World Windows

Window World appeals to eco-conscious consumers by providing energy-efficient window offerings. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Chapel Hill?

Window World doesn’t have any prices listed on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen offers the best availability in Chapel Hill. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of experience in the window installation sector. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider picking Andersen if you're looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen appeals to eco-conscious consumers by providing energy-efficient window offerings. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.

How much does Renewal by Andersen cost in Chapel Hill?

Andersen doesn’t have any prices listed on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Aeroseal Windows logo
FAST QUOTE
as little as 30 seconds
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon Not ideal for residential installations

Aeroseal Windows offers the best window installation for businesses in Chapel Hill. It's an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. Aeroseal has about 23 years of experience in the window installation sector. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider picking Aeroseal if you're looking for a company that installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows appeals to eco-conscious consumers by providing energy-efficient window offerings. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.

How much does Aeroseal Windows cost in Chapel Hill?

Aeroseal doesn’t have any prices listed on its website, but it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Universal Windows Direct logo
FAST QUOTE
as little as 30 seconds
Best Warranty

Universal Windows Direct

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 2002
Pros:
  • Pros icon Makes charitable contributions
  • Pros icon Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Limited service area
  • Pros icon Some installations carried out by third-party contractors
  • Pros icon Quality of service will depend on your area

Universal Windows Direct offers the best warranty in Chapel Hill. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has about 20 years of experience in the window installation sector. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider picking Universal if you're looking for a company that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct appeals to eco-conscious consumers by providing energy-efficient window offerings. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.

How much does Universal Windows Direct cost in Chapel Hill?

Universal doesn’t have any prices listed on its website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Window Nation logo
FAST QUOTE
as little as 30 seconds
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation offers the best residential windows in Chapel Hill. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has about 16 years of experience in the window installation sector. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider picking Window Nation if you're looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

Window Nation appeals to eco-conscious consumers by providing energy-efficient window offerings. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.

How much does Window Nation cost in Chapel Hill?

Window Nation doesn’t have any prices listed on its website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. If you’d like more accurate pricing information, you can get a quote on the company’s website.

We aim to remain unbiased and transparent by describing pros and cons for every company we review. Additionally, our rankings are not influenced by any partnerships.

More Window Companies in Chapel Hill

Renewal by Andersen

Garner, NC
4.7
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Window Replacement/Installation
  • Service icon Storm/Impact Windows
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows

Website: https://renewalnc.com/
Address: 105 Sigma Dr, Garner, NC 27529
Phone: (919) 701-4082

Champion Replacement Windows of Raleigh

Durham, NC
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors

Website: https://www.championwindow.com/Raleigh/
Address: 4018 Patriot Dr Suite 120, Durham, NC 27703
Phone: (919) 439-4475

Champion Replacement Windows of Greensboro

Greensboro, NC
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors

Website: https://www.championwindow.com/Greensboro/
Address: 412 Gallimore Dairy Rd A, Greensboro, NC 27409
Phone: (336) 790-2829

Window World of Raleigh

Apex, NC
4.6
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Window Repair

Website: https://www.windowworldofraleigh.com/
Address: 1020 Investment Blvd, Apex, NC 27502
Phone: (919) 212-6598

Window Nation

Raleigh, NC
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows

Website: https://www.windownation.com/raleigh-durham-window-replacement/
Address: 9121 Anson Way, Raleigh, NC 27615
Phone: (919) 727-4140

Rice's Glass Company

Carrboro, NC
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Mirrors
  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Window Replacement/Installation

Website: https://ricesglasscompany.com/
Address: 107 Lloyd St, Carrboro, NC 27510
Phone: (919) 967-9214

Pella Windows & Doors of Raleigh

Durham, NC
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://www.pella.com/locations/nc/durham/
Address: 3252 S Miami Blvd Suite 107, Durham, NC 27703
Phone: (919) 859-9881

Gerald Jones Company

Durham, NC
3.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Glass Doors

Website: http://geraldjones.com/
Address: 1909 Garland St, Durham, NC 27705
Phone: (919) 286-1700

Kelly Window and Door, Inc.

Cary, NC
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service

Services Offered

  • Service icon Wood Frames
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows
  • Service icon Vinyl Frames
  • Service icon Double-Hung
  • Service icon Glass Doors

Website: https://www.kellywindowanddoor.com/
Address: 111 Woodwinds Industrial Ct, Cary, NC 27511
Phone: (919) 461-0010

City Mirror & Glass, Inc.

Cary, NC
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Showers
  • Service icon Window Repair
  • Service icon Window Replacement/Installation
  • Service icon Glass Repair
  • Service icon Custom Glass
  • Service icon Mirrors

Website: http://www.citymirrorandglass.com/
Address: 100 Woodwinds Industrial Ct suite c, Cary, NC 27511
Phone: (919) 377-8463

Glass Doctor of Raleigh

Raleigh, NC
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Repair
  • Service icon Energy-Efficient Options
  • Service icon Skylights
  • Service icon Custom Glass
  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Glass Repair
  • Service icon Window Replacement/Installation

Website: https://glassdoctor.com/raleigh
Address: 5912 Triangle Dr, Raleigh, NC 27617
Phone: (919) 571-3350

AJT Construction, Inc.

Raleigh, NC
5
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: http://ajtraleigh.com/
Address: 9220 Fairbanks Dr #230, Raleigh, NC 27613
Phone: (919) 848-3159

Homefix Roofing and Window Installation of Raleigh

Morrisville, NC
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://homefixcustomremodeling.com/raleigh-nc/
Address: 3800 Gateway Centre Blvd STE 310, Morrisville, NC 27560
Phone: (888) 904-7527

Windows, Doors & More, Inc

Raleigh, NC
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Pocket Windows
  • Service icon Energy-Efficient Options
  • Service icon Wood Frames
  • Service icon Double-Hung

Website: http://www.wdmore.com/
Address: 8411 Glenwood Ave #107, Raleigh, NC 27612
Phone: (919) 460-6565

My Guys Remodeling

Apex, NC
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation

Website: https://www.myguysremodeling.com/
Address: 1109 Classic Rd, Apex, NC 27539
Phone: (919) 679-9758

Oak City Roofing

Cary, NC
5
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://www.oakcityroofing.com/
Address: 113 Felspar Way, Cary, NC 27518
Phone: (919) 535-4278

O.C. Taylor, LLC

Raleigh, NC
3.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: https://octaylor.com/
Address: 7920 ACC Blvd STE 200, Raleigh, NC 27617
Phone: (919) 714-2200

Raleigh Windows and Siding, LLC

Raleigh, NC
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Showers

Website: http://www.raleighwindowsandsiding.com/
Address: 6003 Chapel Hill Rd #113, Raleigh, NC 27607
Phone: (855) 725-9463

HK Windows, Inc.

Morrisville, NC
2.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung

Website: http://www.hkwindows.net/
Address: 5101 Nelson Rd SUITE100, Morrisville, NC 27560
Phone: (919) 544-5187

Alliance Premium Windows

Haw River, NC
2.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: https://alliance-premium-windows.business.site/
Address: 3751 Hampton Oaks Ln, Haw River, NC 27258
Phone: (336) 376-0938
Chapel Hill Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Chapel Hill, NC using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.

How Installing Energy-Efficient Windows in Chapel Hill Saves You Money

By switching to energy-efficient windows, you and your family can benefit in several ways, such as:

  • Protect your investment: When your home is on the older side, your windows could also be outdated or damaged. Upgrading and repairing your windows is an important part of maintaining your property and its value.
  • Decrease your carbon footprint: By using less energy after upgrading to Energy Star certified windows, you’ll also be decreasing your carbon dioxide emissions by about 12%, according to Energy Star.
  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
  • Save money on power bills: Because energy-efficient windows lower how much energy you need to heat or cool your home, the switch can help you save about $354 annually on your energy bills in Chapel Hill.

Estimated Cost of Window Replacement in Chapel Hill

Windows come in different styles, purposes and shapes, so costs and services will vary tremendously based on your project. Below, we go over the typical cost and services that you can get from window installation companies.

How Much Do New Windows Cost?

Typically, Chapel Hill homeowners can anticipate their window replacements to range from $250 to $1,200. The most common installations sit at about $600. How much it will cost varies depending on several factors, such as size, the location of your home, type, material, number of windows and more.

It’s important to bear in mind that windows with higher efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in Energy Star certified windows can save Chapel Hill homeowners $354+ a year when replacing single-pane windows.

Something else that affects the overall cost is the material of the frame you pick. Aluminum frames are usually the least expensive and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames cost the most because they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

In general, there are two types of window installation services companies offer: full-frame and pocket installations.

Full-frame installations are necessary when you want a new style or your window has significant rot. With this service, your professionals will replace the total window, including the trim, frame and sill. A pocket installation entails replacing a window without replacing the frame. This means instead of removing the whole unit and rebuilding it, the installer will just put the replacement window (also called a retrofit or insert window) into the frame.

Your window installation company will be able to help you decide what’s best for your needs. In Chapel Hill, the decision will mostly depend on how old your home is and if there’s any damage. Wood can decay if not properly maintained over the years, so it’s a good idea to have a professional check on your frames and window sills.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Buy 2 Windows, Get 2 Free
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

How We Choose the Best Window Installers in Chapel Hill

EcoWatch reviews are different from most reviews, as we assess these companies through a sustainability lens. Along with energy efficiency, we analyzed several window installers in Chapel Hill and ranked them using the following methodology:

Service Area

This one is pretty self-explanatory, but we’ve chosen to highlight window installation companies that serve the Chapel Hill area so you can find a quality window installation company near you.

Work Quality

We’re willing to bet that you’re looking for professionals who do a great job installing windows. We’ve vetted each company included in our guide to ensure its contractors are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed trends in recent online reviews to determine the companies with the highest rates of customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across nearly every category, including cost, quality of installation, professionalism, quality of parts, warranty and more.

Cost

This one is a give-and-take: as with other services, cheap window companies are not going to provide the most quality service. On the other hand, we want to ensure we’re highlighting companies that offer a spectrum of price and financing options so they’re accessible to most homeowners.

Warranty

Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Lastly, we like to see companies that have a proven track record in the industry. Window installation companies that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.

Chapel Hill, NC Window Replacement FAQs

How much should a window install cost?

The average cost to install a single window can range from $450 to $650. There are many factors that affect how much it costs, which include the materials used in designing the windows, the number of windows, your property’s location, how energy-efficient the windows are, local labor costs and styles and sizes of windows.

What kind of window is the most energy-efficient?

Generally, double-pane windows are more efficient than single-pane windows and windows that don’t open are more efficient than windows that do. To be sure you’ll get the most energy-efficient windows, look for models that have the blue Energy Star certification attached to them — they’re certified energy-efficient by the U.S. Department of Energy.

What services do window installation companies offer?

Window installers travel to your property to remove your old windows and replace them with new ones. Some providers install products manufactured by other companies, whereas others are both manufacturers and installation companies combined. The installer will also clean up after the installation.

How long does it usually take to install windows?

Because the average installation time of a window is 30 minutes, around 16 windows can be installed in an 8-hour work day.