Oversized, Dry-Fired Hot-Water Boiler

Steamhead

This W-M EGH was maintaining temperature all the time, really for no reason, and it was twice as big as the house needed. The house was unoccupied and somehow it ran out of water.  The main system is converted gravity, and there's a hydro-air zone in the kitchen tied into a heat pump. There was no outdoor thermostat to stop the heat pump outdoor unit when it got too cold.

Steamhead

The new Solaia with HeatWise gas burner

and the proper control setup, including a low-water cutoff! Oh, and it's half the size of the old one. This house is no longer the gas company's dream house.