Pennco Silver 15B-175K Cast Iron Hot Water Boiler, 175,000 BTU, Natural Gas

The Pennco Silver 15B-175K is a chimney-vented, non-condensing cast iron boiler for hot water heating with 175,000 BTU input and 84% AFUE. Its heat exchanger has seven cast iron sections.

Seven cast iron sections joined with cast iron push nipples resist leaks over a long service life. A Honeywell operating control with digital display and diagnostics speeds setup, while a built-in low water cut-off, high-limit control, blocked-vent spill switch, rollout switch and ASME 30 psi relief valve protect the system. A motorized vent damper reduces standby loss.

An integral low-profile draft diverter keeps the overall height down in basements with low headroom. It vents through a 7 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 3.7 gal of water. Zone valves or circulators can be added for multi-zone layouts.

Highlights

• 175,000 BTU input, 147,000 BTU heating capacity

• Net AHRI water rating 128,000 BTU

• 84% AFUE with motorized vent damper

• Left- or right-side piping and wiring

• Integrated low-profile draft diverter

• Honeywell control with digital display and diagnostics; built-in LWCO

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.