Pennco Silver 15B-120K Cast Iron Hot Water Boiler, 120,000 BTU, Natural Gas

The Pennco Silver 15B-120K is a chimney-vented, non-condensing cast iron boiler for hot water heating with 120,000 BTU input and 84% AFUE. It serves baseboard and radiator systems with whole-home heat.

Every cast iron section, dry-leg ends included, is pressure tested at the factory, and intermittent electronic ignition works with a motorized vent damper to cut heat lost up the chimney. Piping, gas and electrical hookups can be made on the left or right side of the jacket.

An integral low-profile draft diverter keeps the overall height down in basements with low headroom. It vents through a 6 in. flue to a lined masonry chimney or an approved metal chimney. Supply and return tappings are 1-1/4 in. NPT, the gas inlet is 1/2 in. NPT, and the boiler holds 2.8 gal of water. Zone valves or circulators can be added for multi-zone layouts.

Highlights

• 120,000 BTU input, 101,000 BTU heating capacity

• Net AHRI water rating 88,000 BTU

• 84% AFUE with motorized vent damper

• Left- or right-side piping and wiring

• Integrated low-profile draft diverter

Specifications

In the box

• Vent damper

• Draft hood

• Jacket

• Parts kit: 30 psi relief valve, drain valve, temperature/pressure gauge, fittings

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.