Pennco Silver 1604HSID Cast-Iron Steam Boiler, 112,000 BTU, Natural Gas

The Pennco Silver 1604HSID is a natural gas steam boiler with cast-iron sections and 112,000 BTU/h input for residential and light commercial steam systems. It delivers 91 MBH heating capacity and a 68 MBH net steam rating, about 283 sq. ft. of radiation.

The sections are joined with cast-iron push nipples, so both parts expand at the same rate and the seal stays watertight. Water level is watched by a CycleGard CG400 low-water cut-off whose Intermittent Level Test keeps foam from triggering false shutdowns. Electronic intermittent ignition, a 24 V automatic redundant gas valve that carries its own regulator and a pilot filter, a rollout switch and a spill (blocked vent) switch round out the safety package.

Venting is through a 6 in. flue with an integral draft diverter and vent damper. Piping connections are two 2-1/2 in. NPT supply and return tappings and a 1/2 in. NPT gas inlet, plus a boiler drain valve. Front-mounted controls, an insulated jacket, a glass water-level gauge, a pressure limit control and a 15 psi ASME safety valve are standard. Power is 120 V AC, under 12 A, on a 15 A circuit.

Highlights

• 112,000 BTU/h input and 91 MBH heating capacity

• 68 MBH net steam rating, about 283 sq. ft. of radiation

• 82% AFUE

• CycleGard CG400 low-water cut-off with Intermittent Level Test

• 6 in. vent with integral draft diverter and vent damper

• Two 2-1/2 in. NPT tappings and 1/2 in. NPT gas inlet

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.