Slant/Fin’s new CHS line consists of eight modulating and condensing stainless-steel, wall-mount, gas-fired boiler models. Each boiler modulates up to a 5:1 turndown with sizes ranging from 85,000 Btu/hr. to 399,000 Btu/hr. inputs. Can be installed with flexibility such as top or bottom supply and return connections, top or bottom gas connections, vent runs of up to 150’ and five vent termination options. The fire-tube exchanger is ASME-certified.