Better Windows. Bigger Savings. YES, Really!

Exceptional Energy Efficiency – .24 U-Value

American-Made with a Full Lifetime Warranty

Save Thousands Compared to National Brands

Upgrade your home with the window that does it all. Our Harvey Classic Double Hung is a homeowner favorite for good reason — combining timeless style with modern energy performance.

Whether you're replacing a few windows or doing the whole house, you’ll get unbeatable value without compromising quality. And with our local team at The Window Source NH, installation is easy and stress-free.

*Limited-time seasonal offer. Financing available. Free consultations included.

🏡 Best Window, Best Price — Guaranteed!

Get Your Free Quote

Summer-Ready Comfort. Year-Round Savings.

Keep the Heat Out — and Your Money In.

Exceptional .24 U-Value for Superior Insulation

Eliminate Drafts and Cold Spots

American-Made Quality with Lifetime Protection

Say goodbye to hot spots, sweaty afternoons, and sky-high energy bills. Harvey Classic Double Hung Windows are built to block summer heat while keeping your home cool and comfortable — all season long.

With an outstanding .24 U-Value, these windows help your A/C work smarter, not harder — giving you better comfort and lower costs every month. Plus, they look amazing doing it.

*Free quote, flexible financing, and expert local installation available now.

❄️ Keep the Heat Out. Keep the Comfort In.

Get Your Free Quote

🪟 The Window Source Replacement Window & Door Company New Hampshire, Massachusetts, & Maine

New England's Source For Windows & Doors

The Window Source NH installs windows & doors in New Hampshire, Massachusetts, and Southern Maine. Our locally owned company cares about each and every customer.

Best Windows. Best Price. Guaranteed.© We offer the highest-quality replacement windows available at factory-direct pricing. We guarantee our customers get a premium, energy-efficient product for a fraction of the cost of our competitors' models.

No DIY & Big Box Stores. We measure, custom order, & professionally install your windows at factory direct prices. That's the Window Source advantage.

Best Windows. Best Price. Guaranteed.©

100% Customer Satisfaction Guarantee
FREE In-Home Estimates
ENERGY STAR® Rated Products
Transferable Lifetime Warranties
Independently Certified NFRC Labels
Best Value Best Price Guaranteed©

Save on a brand new front entry door & sliding patio door. Browse our site or simply call us today for friendly, professional support.

Let's Work Together

In-Home
Quote

Receive a free, precise quote. We measure your windows and doors accurately to provide an exact estimate.

Custom
Manufactured

We send your dimensions to our manufacturing partners. Your windows are custom made for a perfect fit.

Schedule
Installation Day

We inspect and prepare your order. Installation day comes and perform our signature "No Mess" install.

Scott Orlosk

12:54 17 Oct 22

About 7-years ago, I had several large picture windows and patio doors replaced at a home on the beach. They all directly faced the ocean and take a beating from wind and salt. This installation was neat and tidy. The products had a lifetime warranty but like most consumers, I wondered what would actually happen if a window needed to be replaced. After-all, it was a harsh environment - and a warranty is only as good as the company making the promise.After 7-years of pounding from mother nature, one of the 2nd floor window's insulating seals let go and moisture developed. The business owner came out, took a look, ordered a new window and replaced it with no cost to me. Gracious and professional handling all around. I'm impressed.

Josh Lent

19:09 12 Sep 22

After calling Skip to relay that I was a bit anxious about the window replacement as I had been recently burned by another company with incorrect installation, Skip went above and beyond to ensure that I was completely at ease by providing great communication and photo evidence of the correct installation. My concerns were heard, extra attention/effort was provided and the overall service received was top notch. Highly recommended. Thank you!

M S

23:21 23 Apr 22

The Window Source of southern NH installed new casement windows in an addition on our existing home. Communication and scheduling was excellent, installer Craig is very professional. Windows look great and match the existing house which is 40 years old. Told the owner, Skip we will be calling him again to replace a couple old windows. A+ company and customer satisfaction!!

Maggie Plasse

19:18 29 Nov 21

I bought 7 windows from Window Source. There was a slight problem with one of the windows. Skip, the owner, was quick in responding and took care of the problem right away. I was very happy with the installer, Leroy, he was professional, polite and cleaned up. When he left, he took the old windows and storm windows and left me with new insulated windows.....no mess at all. I need a new front door and will certainly call Window Source. Thank you Skip, Leroy and Andrea.

Kyra Caron

12:26 01 Apr 21

We reached out to the window source to install 9 new windows in our 1900 year old house. Gary who came out to give us a quote was easy to work with and very informative. He walked me through what the process would be and why we needed what we needed. We had two other companies give us quotes but we felt the quality and knowledge of the window source company was the best option for us. For installation it was such an easy process and the installers were very professional. They completed the project in two days and it looks amazing. They really did a great job and I’m very happy we decided to choose the window source.