Serving Berkeley, Oakland, and Alameda, Contra Costa, and Marin Counties!
high efficiency windows

Contrary to popular belief, new windows are not necessarily the best investment for most people who want to improve their home’s energy efficiency. Dual pane windows insulate about three times as well as older single pane windows, and are much more airtight, but they are also very expensive. In most older homes, the homeowner could insulate the attic, walls, and floors of the home for less money than it would cost to replace all the windows, and the insulation would have a much more pronounced effect on energy savings, indoor air quality, comfort, and noise, as compared with replacement windows.

However, if you have other reasons to replace windows, such as aesthetics, poor operation of older windows, or a source of noise, energy efficiency becomes one more good reason to go ahead! Hassler has partnered with Custom-Exteriors to provide high quality replacement windows that meet Energy Star criteria.

Contact us today to learn how Hassler can help you improve your home's efficiency!

Looking into high efficiency windows for your home?

Talk to us today!


Schedule Service

Get Started!
Keep Everything Running Smoothly to Save You $$$ Down the Road
Convert both your gas furnace and gas water heater to a heat pump and heat pump water heater at the same time and get $2,500 for your old equipment.
Keep Your Home Healthy!
Home energy audit credited upon installation with Hassler
with Heat Pump or Heat Pump Water Heater Conversion
Apply for financing today!


Indoor Air Quality and Energy Efficiency

indoor air quality
Tuesday, January 5, 2016

A lot of homeowners living in Berkeley or Oakland, CA find themselves focusing more and more each year on improving energy efficiency.

Diamond Certified logo
NATE logo
Neighborhood Favorite 2023 logo
Bayren Logo
Carrier logo