Order Custom Vinyl Replacement Windows

Buy windows Online! ClearMax® is the trusted choice of over 1,500 households and contractors in San Diego for replacement and new construction windows

Windows for sale! Our LowE coated, dual paned house windows will reduce heat transfer, lower your energy bills, improve energy performance, and save you money! Use our online window builder to custom create the window you need, get an instant quote, and place an order. Free pickup from our showroom.

Customize Windows

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Select window type

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Select width and height

Width must be at least 10 Inches

Width must be no more than 72 Inches

Height must be at least 10 Inches

Height must be no more than 72 Inches

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Need a special Window? Order by phone.

Call us on (858) 220-1179 (10am - 5pm PST)

Have a question? Send us an email

Free Pickup From our showroom in San Diego

Online purchases are supplied by JELD-WEN

All windows are made out of Vinyl

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  • 5 star rating Clear max was the best choice we could have made as we had to get or doors replaced and also... read more

    Roger P. 7/01/2021

    5 star rating Wonderful job done by this company as we needed some custom windows installed to our home along with some customer... read more

    Samantha M. 6/16/2021
  • 5 star rating Just love the experience with ClearMax, i looked for a fast shipping service and found them, submitted a order directly... read more

    Sapiri M. 6/15/2021

    5 star rating I reached out to ClearMax and spoke with Josh to get quotes to upgrade my windows at my rental property.... read more

    Johnny L. 5/03/2021
  • 5 star rating Needed to replace old 70s windows. Awesome to work with from start to finesh. Estimator came out, measured everything explained... read more

    Yahav C. 3/19/2021

    5 star rating MANY THANKS to Danielle, Josh, Samir (Sam), and the entire ClearMax team for taking a nightmare of a situation --... read more

    Leigh P. 2/26/2021


How much do energy-efficient window cost ?

Use our simple online window builder above to custom create the window you need, get an instant quote, and place an order for order windows online.

What makes a window energy efficient?

Energy efficient windows, also known as energy saving windows reduces your home’s energy usage—and therefore, your bills!

These are the factors that make a window energy efficient.

1. Quality Frame Materials

High quality frame materials will reduce the transfer of heat and offer better insulation. Generally, aluminum windows are the least efficient simply because they conduct heat too well. Vinyl frames tend to offer better performance due to its insulative qualities.

2. Multiple Glass Panes

A single pane of glass won’t offer much insulation. Double paned windows create air pockets between the layers of glass, which are sealed shut to prevent any air from entering or escaping. 

3. Gas Fills

Energy-efficient windows will have Argon gas between window panes which offer better insulating performance than regular air. Argon gas is non-toxic, odorless, and colorless.

4. Low-E Glass Coatings

To maximize the efficiency of the glass itself, energy-efficient windows will have a Low-E coating on them to reflect infrared and UV light. Low-E is a thin metallic coating that goes on the glass and is an effective way to keep heat inside your home in the winter or to keep it out of your home in the summer.

5. Proper Installation 

The most energy-efficient window will be useless if it is installed improperly. Proper installation of a window contributes greatly to its performance. This is just as important as the frame material or type of glass and gas fill.

How are windows graded?

The National Fenestration Rating Council (NFRC) operates a voluntary program that tests, certifies, and labels windows, doors, and skylights based on their energy performance ratings. The NFRC label provides a reliable way to determine a window’s energy properties and to compare products. Learn more.

Can windows be installed without professional help?

To ensure that your windows continue to maintain their impeccable performance, their installation must be done square and level, and an appropriate water barrier must be fixed. In case these measures are not taken while the windows are being installed, there is a possibility of both your home and windows getting damaged. Thankfully, seeking professional help will prevent such adverse consequences.

What is the cost of windows installation?

Installation depends primarily on the type of window purchased for installation and the kind of installation required. At ClearMax™ we offer professional installation at a flat fee $375 per window with. Add installation service at checkout.