Pennco Silver 1608HSID Cast-Iron Steam Boiler, 262,000 BTU, Natural Gas

The Pennco Silver 1608HSID is a 262,000 BTU natural gas steam boiler with a cast-iron heat exchanger, aimed at large homes, workshops and commercial spaces with heavy heating loads on an existing steam system.

Cast-iron sections joined by push nipples expand together when heated, so the boiler holds a watertight seal without inexpensive gaskets. A 6 in. steam chest and two 2-1/2 in. NPT supply tappings, matched by two returns, distribute steam quickly through the piping. Gas connects at a 3/4 in. NPT inlet, the drain valve is 3/4 in., and the unit runs on 120 volts.

Protection includes an integral draft diverter, a low-water cut-off, a pressure limit control and a pop safety valve, plus a fuse link that shuts the burner down on flame rollout and a switch that stops it if the vent is blocked. Owners can check conditions at a glance on the steam pressure gauge and the glass sight gauge for water level. Efficiency is rated at 82% AFUE.

Highlights

• 262,000 BTU natural gas steam boiler

• 82% AFUE

• Cast-iron sections joined by push nipples

• 6 in. steam chest with two 2-1/2 in. NPT supply tappings

• Rollout fuse link and blocked-vent shut-off for added protection

• Glass water-level gauge and steam pressure gauge

Specifications

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.