At Hassler, we see the house as singular system with everything from the furnace to the insulation working as one unit. Our home performance experts are capable of diagnosing problems in your home and finding comprehensive and lasting solutions. If you are looking to improve your home performance with solar panels, an energy assessment, high efficiency windows and more, give Hassler a call for a whole home solution.

Energy Assessment

A home energy assessment is a diagnostic test that evaluates the efficiency of your El Cerrito, Berkeley, San Rafael or surrounding area home, and pinpoints the areas that need to be improved to maximize your home's performance.

BESO Assessment

Hassler offers Building Energy Saving Ordinance (BESO) assessment service to homeowners and realtors in Berkeley who are looking to sell their house.

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.

Attic Platforms

Attics are great for storage, but may homeowners unknowingly damage the effectiveness of their attic insulation when storing unused items in the attic.

Energy STAR

For homeowners in Oakland, El Cerrito, San Rafael and surrounding areas, the journey towards enhanced home performance can seem never ending. After all, there are countless different energy efficiency upgrades that can be made, and many people have a hard time understanding where to start.