New state building codes that require tighter energy efficiency standards took effect March 1.
The new energy codes create efficiency standards for commercial and residential buildings that apply to insulation, air leakage, ventilation and electrical appliances, among others.
So-called “stretch codes” take effect Dec. 1. These codes require a higher standard of thermal energy efficiency, a blower door test to verify the air leakage rates and electric vehicle support for multifamily developments of 10 or more dwelling units, according to the state. It can be adopted by municipalities and is applied to Act 250 permits.
Under the state’s comprehensive energy plan, all new buildings must be built to net zero design standards by 2030. There will be five more updates to the codes prior to the deadline.
Department of Public Service Commissioner Chris Recchia said the codes help ensure that buildings are more efficient and environmentally sustainable. He said it can also save occupants and property owners money.
“I think that it is incumbent upon us as we build new building stock we are really helping homeowners to get assurances that systems are in place to make their homes more energy efficient. I would love to see a house rating system where homes are rated based on their energy capabilities,” Recchia said.
The new codes address a problem with lagging code compliance, he said. Builders are required to self-certify that they are complying with the codes. To date, only about 50 percent of residential builders and about 70 percent of commercial builders certify they are in compliance, according to Recchia.
“Documentation has been lagging,” Recchia said. “It has to be filed on the land record now. It will show up when someone does a title search on a property. The failure of that to be there won’t cause a cloud on the title, but it it does indicate that there is something missing.”