Danvers Electric
The town has its own electric company. Danvers Electric lists a $300 rebate on an EnergyStar hybrid heat pump water heater, with the application due within 365 days of the purchase. If you heat with gas, Mass Save's $750 rebate may apply through National Grid.
The town's own water
Danvers is not on MWRA water. The supply is Middleton Pond, fed by two reservoirs, plus two wells near the Middleton line. Ask the water division for the hardness figure. What it means for a tank.
The housing
About 64 percent of Danvers homes are single-family. The median home was built in 1963, and a third of homes heat with oil.
Gas
National Grid is the gas company. For a gas smell, leave and call 911, then National Grid at 800-233-5325.