Condensing
Fulton 
Fulton Endura+
Sizes: 2,500,000 to 12,000,000 BTU Input
Condensing, firetube, duplex stainless-steel heat exchanger. Primary/Variable flow hydronic system application. Ultra-high efficiencies up to 99%. Fully modulating with high turndown capabilities.
Fulton Endura
Sizes: 750,000 – 2,000,000 BTU Input
Condensing, firetube, duplex stainless steel heat exchanger. Primary/variable flow hydronic system application. Ultra high efficencies up to 99%. Fully modulating with high turndown capabilities.
Fulton Vantage
Sizes: 2,000,000 – 6,000,000 BTU Input
Condensing, firetube duplex alloy stainless steel heat exchanger, linkageless modulation. High efficencies up to 95%. Uses natural gas or duel fuel with natural gas & #2 oil.
FULTON ENDURA XE
Sizes: 399,000 to 750,000 BTU Input
Condensing, firetube, stainless-steel heat exchanger. Primary/Variable flow hydronic system application. Ultra-high efficiencies up to 99%. Fully modulating with high turndown capabilities.
Patterson Kelley 
PK Sonic
Sizes: 650,000 to 4,000,000 BTU Input
Condensing, stainless steel heat exchanger, 5:1 turndown, and custom configurable. Ultra high efficiencies up to 97%. Fits through 36″ doorway. Designed to allow all annual maintenance through front door.
PK MACH
Sizes: 300,000 – 4,000,000 BTU Input
Condensing, cast aluminum heat exchanger, low maintenance. High efficiency, up to 95%. Uses natural gas, propane, or both. Fits through standard doorway and elevator.
PK STORM
Sizes: 650,000 – 6,000,00 BTU Input
Condensing, stainless steel heat exchanger, 10:1 turndown. Ultra-high efficiencies up to 97%. Sizes 2000 MBH and smaller fit through a 36” door. Designed for simplified service and maximum efficiencies.
PK SOLIS
Sizes: 725,000 – 3,000,00 BTU Input
Condensing Firetube, stainless steel heat exchanger, 10:1 turndown. Ultra-high efficiencies up to 97%. Fits through 36″ doorway. Designed to maximize comfort without sacrificing savings or floor space.
Non-Condensing
Patterson Kelley
PK Modu-Fire
Sizes: 750,000 – 3,000,00 BTU Input
Non-condensing, copper finned heat exchanger, full modulation with 5:1 turndown. High efficiencies, up to 88%. Uses natural gas or propane. Easy to inspect and maintain.
Heat & Power Products, Inc. represents the following quality manufacturers.
