“BGW2004 is an amazing tool. I can’t imagine designing a solar house without it.”
Do-It-Yourselfer
Easily get to the next stage in your solar home design process with confidence—but without spending a lot of time or money.
BGW2004, the Solar Assistant is recognized as the leader in solar design software because it is fast, easy, accurate, and inexpensive to use. Developed by an architect with an engineering background and broad experience in solar design, BGW2004 uses terminology understandable by almost anyone and an intuitive interface to quickly generate solar design options.
BGW2004 generates an annual estimate of a residential building’s heating and cooling energy needs, given in terms of energy performance, so you can see how much money you’ll save with each variation in design.
BGW2004 allows you to:
Input and evaluate a building design in minutes
Immediately modify the design to meet your needs
Quickly analyze and compare energy performance of multiple design options as your building design evolves
Compare your design to a Model Energy Code Standard Design using your preferred construction methods