1. Design for Zero Net
- Cost-effective zero net energy homes begin with the design. This is a very critical starting point!
- The designer or architect should be familiar with all the steps involved in building a net zero home as outlined below, and should design the home so that these steps can be achieved in as cost-effective manner as possible.
- The design should specify the following: the siting of the home to take advantage of the sun; the wall, floor and ceiling systems using advanced framing techniques; the insulation R-values for walls, ceiling, and floors; the airtightness standard for the building shell; measures to avoid thermal bridging; the window type, locations and u-values; the door type, locations and R-values; the hot water system and its efficiency rating; the ventilation and heating/cooling systems and their efficiency ratings; the southern roof over-hangs to maximize winter sun exposure and minimize heat from the summer sun; the appliances and their efficiency ratings; the roof size, pitch and orientation to get the most benefit from the solar panels installed; and all other measures that are needed for the home to become a net zero energy home in the most cost effective manner.
Twelve Steps to Affordable Zero Energy Home Construction