Energy Star Qualifications
Ostaco is proud to be an Energy Star certified manufacturer. Our research and development teams will continue their focus on creating more and more energy star windows and doors, Toronto. Please visit the energy star website to see all of the ratings on Ostaco products.
Check the Energy Star website to see if they are listed: Energy Star Canada
Testimonials
Your windows and doors came very highly recommended. My new house looks spectacular. I am glad I listened to the recommendations given to me.
Frank Chanady
We are very pleased we selected Ostaco windows and doors. The installation was flawless and the results spectacular. The new windows enhanced our ...
Trish and Ronald Walker
To Dundas Wood Windows: Nelson, just wanted to write a quick thank you note to you and your team for the fine job you did with our new Ostaco ...
Robert (Rob) Ribarich
We are very delighted and pleased with your excellent job and most impressed with the polite and professional staff...
E. Byers, Smiths Falls, ON
It was most appreciated and we are pleased to see such good service at Lambden
J. and B. Madden, Ottawa, ON
