2015 Most Energy Efficient Windows
May 12, 2015
Wonder Windows, Showers and Baths is proud to carry the OKNA line of Windows. For homeowners in the Northeast investing in top energy efficient windows is a way to stay warmer in the winter and cooler in the summer. Each year EnergyStar.gov designates manufacturers and specific Windows as that years Most Energy Efficient. For 2015 OKNA was designated this rating for many of its Windows. There is the selection of OKNA Windows designated as 2015 Most Energy Efficient.
Double Hung Windows
Product Line | CPD Number | U-Factor | SHGC | Frame Type | PG | Climate Zones |
Insul Tec | OKW-K-18 | 0.15–0.19 | 0.23–0.26 | Vinyl | 50 | N, NC |
Insul Tec | OKW-K-20 | 0.20 | 0.23–0.26 | Vinyl | 50 | N, NC |
Precision Weld | OKW-K-22 | 0.20 | 0.26 | Vinyl | 50 | N, NC |
Enviro Star | OKW-K-23 | 0.16–0.20 | 0.23–0.25 | Vinyl | 60 | N, NC, SC, S |
Starmark | OKW-K-32 | 0.15–0.20 | 0.22–0.24 | Composite | 45 | N, NC, SC, S |
Casement Windows
Product Line | CPD Number | U-Factor | SHGC | Frame Type | PG | Climate Zones |
Casement | OKW-K-26 | 0.16–0.20 | 0.22–0.24 | Vinyl | 70 | N, NC, SC, S |
Picture Windows
Product Line | CPD Number | U-Factor | SHGC | Frame Type | PG | Climate Zones |
Insul Tec | OKW-K-19 | 0.14–0.20 | 0.24–0.27 | Vinyl | 75 | N, NC |
Precision Weld | OKW-K-27 | 0.20 | 0.28 | Vinyl | 75 | N, NC |
Enviro Star | OKW-K-28 | 0.20 | 0.27 | Vinyl | 75 | N, NC |
Sliding Windows
Product Line | CPD Number | U-Factor | SHGC | Frame Type | PG | Climate Zones |
Insul Tec | OKW-K-21 | 0.16–0.20 | 0.23–0.26 | Vinyl | 40 | N, NC |
Precision Weld | OKW-K-24 | 0.17 | 0.25 | Vinyl | 35 | N, NC, SC, S |
Enviro Star | OKW-K-30 | 0.20 | 0.25 | Vinyl | 50 | N, NC, SC, S |
Starmark | OKW-K-33 | 0.15–0.20 | 0.22–0.25 | Composite | 40 | N, NC, SC, S |
Experience the difference working with Wonder! Get started on your Project Today!
We’ll be happy to answer any questions, explain our products and process, or get you started on a free estimate. We staff a team of certified installers who receive ongoing education on their full scope of products.
What Our Customers Say
Homeowners throughout Rochester, Buffalo, and Syracuse trust us to bring their visions to life. Customers love how our professional crews respect their homes, communicate clearly, and deliver exceptional workmanship.
“We decided to replace our tub/shower with a walk-in shower. We contacted 2 companies and Wonder Showers price matched with what we wanted. We were pleased with the communication and love the finished product. The installers went beyond our expectations and kept us assured through the whole process. I highly recommend this company”
Brenda N.
“Windows are very nice, competitively priced, and installed efficiently with care. Austin and Austin are great installers- thoughtful, pretty quick and polite.”
Maureen P.
“From start to finish everyone on the team has been excellent. Harrison in sales, Brianca in the office and Ben & Shane for install. Ben and Shane went above and beyond to make the bathroom look great and eased my bride’s trepidations. Even went as far as putting up beadboard behind the vanity to clean it up. Would recommend to everyone.”
Charlie M.
“They did a great job, Steve Klaver was on time and he explained everything in detail”
Eduardo R.
“I’m so happy with our new bathroom! Wonder communicated with us throughout the process so we knew what to except. The work ended up taking about 3 and a half days instead of the initially planned 3 days, but the guys working on it did a great job.”
Ashley R.
“We have used Wonder Windows to replace all of our windows and have had great experiences. The windows are top-notch quality. From selecting the windows with Tom Garman, having the window space carefully measured by Steve Klaver, and working with Bill Cue to install the windows, the experience has been phenomenal. A great team with a wonderful product.”
Adam S.
“GREAT SERVICE! From the moment that I walked into the showroom, the visit to my house, the presentation of options and the AWESOME DELIVERY of everything from the plan. The young men that completed the SHOWER and FLOOR installation were GREAT! On time daily and superb work to the finish.”
Bill A.
“We had an issue with a window that would not close and lock properly. Steve from Batavia came out and fixed it extremely quickly. Very courteous was not upset because he had to be here. Just did a great job very personable. It’s nice to know if I have another issue there will be someone that will take care of that promptly for me”
Steve D.
Contact Us
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Call Center (call or text):
Mon-Fri: 8am - 5pm
Sat: 9am - 1pm
Showroom & Wholesale Pick Up:
Mon-Fri: 8am - 4:30pm
Call Center (call or text):
Mon-Fri: 8am - 5pm
Sat: 9am - 1pm