Working in partnership with builders, eFree Advisors analyze specific home plans to identify the energy investments that provide the best return and thus optimize your home for energy efficiency and build cost. To save the most on your combined energy bill plus mortgage payment, should you invest in more attic insulation? Better windows? Solar or geothermal? eFree Advisors can answer these questions with fact-based modeling using the SmartSpend System. The end product is the most energy efficient home for the dollar spent and the lowest combination of mortgage payment plus energy bills from day one. Whether you're building a large home or a small home, have a comfortable budget or a tight budget, you can rest assured that with eFree's help, your new home will be perfectly optimized for energy efficiency. Build Smarter. Build Perfectly Efficient.