CWL – Gas Boilers

This compact (29 1/2″ in height), efficient gas series is loaded with features that spell satisfaction for both homeowners and servicemen.  Here are some of the specifics that make the CWL Series an outstanding value in home heating and domestic water supply.

Standard Features

  • ASME CONSTRUCTION – Designed, constructed and hydrostatically tested in accordance with the American Society of Mechanical Engineers Boiler Code Section IV.
  • BUILT-IN “AIR SCOOP” – purges air from the system providing a quiet, trouble free hot water heating system without the use of external devices.
  • EFFICIENCIES UP TO 83% AFUE – The unique combustion design of the CWL boiler heat exchanger, surrounded by water, assures quieter operation while efficiently transferring maximum heat to your home.
  • 007 Circulator or Equivalent
  • Partial Pre-Mix Gas Burner
  • Brass Boiler Drain Valve
  • Triple Aquastat Control
  • COPPER DOMESTIC HOT WATER COIL – Provides the hot water you need when it is needed. The cost of a separate domestic hot water system is eliminated.
  • LESS COIL  and DIRECT VENT – Boiler is also available in a Less Coil and Direct Vent version.

ASME Code BoilerAltitude, Temperature & Pressure Gauge
National Board StampedCirculator/Burner Relay
Flush Jacket007 Circulator or Equivalent
InsulationASME Relief Valve
Partial Pre-Mix Gas BurnerBrass Boiler Drain
Electronic Ignition 12,000 VoltsBuilt-in "Air Scoop"
15 Second Pre-PurgeMEA #62-03-E (NYC)
5 GPM Tankless CoilMG-1 Double Acting Draft Control
Factory Assembled and WiredGSK-3 Spill Switch
Lifetime Limited WarrantyBurner Packaged Separately as Burner in the Box
Optional Equipment
Rear Flue Kit with Built-In Draft RegulatorDV Model - Direct Vent
Less Coil Option Available


All appliance designs are forced draft pressure fired for optimum performance. They are available with Carlin Gas Burners

Firing Rate CFM1.631.952.28
Input BTU/HR100,000120,000140,000
DOE Capacity BTU/HR85,000100,000115,000
Net Rate BTU/HR74,00087,000100,000
Val Cap. Lbs/HR140140140
Max W.P. PSI303030
Water Content15 Gal.15 Gal.15 Gal.
Coil Capacity*5 Gal.5 Gal5 Gal.
A) Jacket Height29½"29½"29½"
B) Jacket Width21"21"21"
C) Coil Supply Height22"22"22"
D) Supply Height (Hydronic)27½"27½"27½"
E) Burner Height7⅞"7⅞"7⅞"
F) Hydronic Return Height15½"15½"15½"
G) Flue Pipe Dia.5"5"5"
H) Washout (Alt. Return Height)3½"3½"3½"
I) Jacket Depth (Inc. Flange)22"22"22"
Depth Front to Rear with Burner34½"34½"34½"
Hydronic Supply Size1 ¼"1 ¼"1 ¼"
Hydronic Return Size1 ¼"1 ¼"1 ¼"
Washout Size (Alt.Return)1 ¼" (2)1 ¼" (2)1 ¼" (2)
** Intermittent draw: 5 minute draw 5 minute waiting period

CWL – Series Gas Boiler Manual

Click Here to Download

Boiler Warranty

Click Here to Download