Specifications
Boiler Specification SL 26-260 G3 SL 40-399 G3
CSA Input (Natural Gas or Propane)
26 - 260 MBH
40 - 399 MBH
CSA Input (Natural Gas or Propane) 7.6 - 76.2 kW
11.7 - 117 kW
CSA Output 24.9 - 239 MBH
38.4 - 383 MBH
CSA Output
7.31 - 70.0 kW 11.2 - 112 kW
A.F.U.E 95% -
Combustion Efficiency - 96%
Thermal Efficiency (ANSI/AHRI-1500) - 96%
Minimum gas supply pressure (Natural Gas or Propane) 4" w.c. 4" w.c.
Maximum gas supply pressure (Natural Gas or Propane) 14" w.c. 14" w.c.
Minimum Ambient temperature 32°F / 0°C 32°F / 0°C
Maximum Ambient temperature 122°F / 50°C 122°F / 50°C
Max. relative humidity (non-condensing) 90% 90%
Minimum water temp. 34°F / 1°C 34°F / 1°C
Maximum water temp. (electronic hi-limit) 190°F / 88°C 190°F / 88°C
Max. ΔT - supply/return (electronic fence) 40°F 40°F
Max. Water Temperature Lockout Limit 201°F / 94°C 201°F / 94°C
Power use (120Vac/60Hz) @ full fire (less pumps) 127 W 190 W
Weight (empty) 162 lbs / 74 Kg 240 lbs /110 Kg
Heating Surface Area 22.71 ft
2
/ 2.11 m
2
36.56 ft
2
/ 3.40 m
2
Pressure vessel water content 4.64 USG/ 17.6 L 6.66 USG/ 25.2 L
Maximum boiler flow rate 25 USgpm 45 USgpm
Minimum boiler flow rate 6 USgpm 20 USgpm
Maximum operating water pressure* 30 psig/ 206 kPa 80psig/ 551 kPa
Minimum water pressure 8 psig / 55 kPa 8 psig / 55 kPa
Approved installation altitude - ASL 0 - 12,000’ 0 - 12,000’
Maximum equivalent vent length , each side (vent & air
intake) - Natural gas or propane. Air intake options:
either direct vent or indoor supply
200’ (3") 200’ (4")
* Boilers are shipped with a 30 psig pressure relief valve.
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