Adding patio heaters allows you to enjoy your outdoor space on cool evenings and into the winter. But you want to make sure the size and style meets your needs.

A new federal rule sets updated energy efficiency standards for tankless gas water heaters by 2029 — but it doesn’t ban them.

Gas heaters utilize most of the energy in natural or propane gas and can rapidly turn it into efficient heat. However, all gas heaters also produce partially combusted gas, which can be harmful.

Eversource estimates the supply shift would save Massachusetts customers about $400 million over the life of the agreement ...