Slant/Fin CHS-154

The CHS-154 is a size in the line of Slant/Fin's CHS Series, a high-efficiency fire-tube condensing gas boiler line held in the official library's active 'Boilers' section ('Boilers > CHS Series'). The official submittal ratings table (720) prints 15.4–154 MBH input for this size (a single min–max range is printed), 141 MBH heating capacity, a 123 MBH AHRI net rating and 95% AFUE.

It is a condensing fire-tube design with direct spark ignition, a modulating burner, outdoor reset and DHW priority, and lead-lag capability up to 8 boilers. Water connections are 1" NPT, gas is ½" NPT and the vent/air connection is 3". The boiler is wall-standard with a floor kit option, carries MAWP of 30 psi (80 psi on CHS-175 and up), and the line's weights run 110–250 lb with water per the official submittal data.

Slant/Fin prints no 'current' or 'discontinued' sentence; the hub's active 'Boilers' placement is the only official status signal, so Boilers.ca describes the series as current library / documents available on slantfin.com without asserting current production. IMPORTANT: the CHS hub also hosts the official 2018 recall documents — a CPSC notice plus contractor and homeowner notifications — and owners should confirm whether their unit's date range is affected. No official Canadian-sales statement was found, so canadianStatus stays 'unknown'; gas, venting and combustion work belongs with a licensed contractor.