Commercial Boilers - Gas Boilers Series 211A™ Boiler

The Series 211A™ atmospheric, gas-fired steam boiler is designed for maximum corrosion resistance and longer life. The low profile design allows for installations in applications with low head room. The commercial cast iron boiler is installed with water and steam-tight flexible flow port seals for faster installation and allows for the sections to expand/contract independently. Easy and complete access to the boiler for inspection and cleaning can be accomplished without removal of the entire jacket, thereby promoting better maintenance.




Product Details:

Type: Commercial
Construction: Cast Iron
Fuel: Gas-Fired (Natural or LP)
Input: 630 to 9,450 MBH
Output: 486 to 7,390 MBH
Venting: Natural Draft
Trim: Steam
Ignition: Spark Pilot


Series 211A™* Thermal Efficiency, % Combustion Efficiency, % Boiler H.P. Steam Water Content, Gal
Model Number Input, MBH Gross Output, MBH1 Net Ratings2
Steam, sqft Steam, MBH
211A-04 630 486 1521 365 77.1 79.8 14.5 31.64
211A-05 840 650 2033 488 77.4 80.0 19.4 39.55
211A-06 1050 816 2550 612 77.7 80.0 24.4 47.46
211A-07 1260 980 3063 735 77.8 80.0 29.3 55.37
211A-08 1470 1145 3579 859 77.9 80.0 34.2 63.28
211A-09 1680 1310 4113 987 78.0 80.0 39.1 71.19
211A-10 1890 1476 4688 1125 78.1 80.0 44.1 79.10
211A-11 2100 1642 5263 1263 78.2 80.0 49.1 87.01
211A-12 2310 1806 5829 1399 78.2 80.0 54.0 94.92
211A-13 2520 1958 6333 1520 77.7 80.0 58.5 102.83
211A-14 2730 2124 6871 1649 77.8 80.0 63.5 110.74
211A-15 2940 2290 7408 1778 77.9 80.0 68.4 118.65
211A-16 3150 2454 7938 1905 77.9 80.0 73.3 126.56
211A-17 3360 2621 8479 2035 78.0 80.0 78.3 134.47
211A-18 3570 2785 9008 2162 78.0 80.0 83.2 142.38
211A-19 3780 2952 9550 2295 78.1 80.0 88.2 150.29
211A-20 3990 3116 10,079 2419 78.1 80.0 93.1 158.2
211A-21 4200 3280 10,613 2547 78.1 80.0 98 166.11
211A-22 4410 3449 11,158 2678 78.2 80.0 103.0 174.02
211A-23 4620 3599 11,642 2794 77.9 80.0 107.5 181.93
211A-24 4830 3763 12,175 2922 77.9 80.0 112.4 189.84

Note: For LP Ratings decrease by 2.5%.

* Assembled blocks available to 19 sections only.

  1. Gross Output Rating, Thermal Efficiency and Combustion Efficiency determined in accordance with AHRI requirements.
  2. Net AHRI steam ratings based on an allowance shown in table.
  3. Consult factory before selecting a boiler for installation having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.
  4. Consult product catalog literature for larger capacities and detailed ratings information up to 9,450 MBH.




Series 211A™ Boiler Dimensions

Boiler Model Number Dimensions Length & Width Boiler Section Length
“A” “B” “C”
211A-04 28-1/8″ 38-3/8″ 63″ 21-3/4″
211A-05 33-3/4″ 44″ 63″ 27-3/8″
211A-06 39-3/8″ 50-1/4″ 65″ 33″
211A-07 45″ 55-7/8″ 63″ 38-5/8″
211A-08 50-5/8″ 61-3/4″ 63″ 44-1/4″
211A-09 56-1/4″ 67-5/8″ 63″ 49-7/8″
211A-10 61-7/8″ 73-1/4″ 65″ 55-1/2″
211A-11 67-1/2″ 80-3/4″ 65″ 61-1/8″
211A-12 73-1/8″ 86-3/8″ 63″ 66-3/4″
211A-13 78-3/4″ 91-1/2″ 63″ 72-3/8″
211A-14 84-3/8″ 97-1/8″ 65″ 78″
211A-15 90″ 102-3/4″ 65″ 83-5/8″
211A-16 95-5/8″ 108-3/8″ 65″ 89-1/4″
211A-17 101-1/4″ 114-1/4″ 65″ 94-7/8″
211A-18 106-7/8″ 120-3/8″ 65″ 100-1/2″
211A-19 112-1/2″ 139-1/8″ 65″ 106-1/8″
211A-20 118-1/8″ 144-3/4″ 65″ 111-3/4″
211A-21 123-3/4″ 150-3/8″ 65″ 117-3/8″
211A-22 129-3/8″ 156″ 65″ 123″
211A-23 135″ 161-5/8″ 65″ 128-5/8″
211A-24 140-5/8″ 166-3/8″ 65″ 134-1/4″
211A-25 146-1/4″ 172″ 65″ 139-7/8″
211A-26 151-7/8″ 177-5/8″ 65″ 145-1/2″
211A-27 157-1/2″ 183-1/4″ 65″ 151-1/8″
211A-28 163-1/8″ 188-7/8″ 65″ 156-3/4″
211A-29 168-3/4″ 194-1/2″ 65″ 162-3/8″
211A-30 174-3/8″ 200-1/8″ 65″ 168″
211A-31 180″ 205-3/4″ 65″ 173-5/8″
211A-32 185-5/8″ 211-7/8″ 65″ 179-1/4″
211A-33 191-1/4″ 217-1/2″ 65″ 184-7/8″
211A-34 196-7/8″ 223-7/8″ 65″ 190-1/2″
211A-35 202-1/2″ 229-1/2″ 65″ 196-1/8″
211A-36 208-1/8″ 262″ 65″ 201-3/4″
211A-37 213-3/4″ 268″ 65″ 207-3/8″

Series 211A™ Boiler Dimensions (Cont’d)

Boiler Model Number Intermediate Riser Center Lines 3″ Tappings – Used in Addition to Two End Risers
(Dimensions are Approximate)
“D” “E” “F” “G” “H” “I” “J’ “K” “L” “M” “N” “O” “P”
211A-04 BOILER MODEL NUMBERS
211A-04-S TO 211A-17-S INCLUSIVE
DO NOT INCORPORATE
INTERMEDIATE TAPPED SECTIONS
211A-05
211A-06
211A-07
211A-08
211A-09
211A-10
211A-11
211A-12
211A-13
211A-14
211A-15
211A-16
211A-17
211A-18 53-1/16″ 47-7/16″
211A-19 53-1/16″ 53-1/16″
211A-20 58-11/16″ 53-1/16″
211A-21 58-11/16″ 58-11/16″
211A-22 41-13/16″ 45″ 36-3/16″
211A-23 41-13/16″ 45″ 41-13/16″
211A-24 47-7/16″ 45″ 41-13/16″
211A-25 36-3/16″ 33-3/4″ 33-3/4″ 36-3/16″
211A-26 36-3/16″ 33-3/4″ 39-3/8″ 36-3/16″
211A-27 36-3/16″ 28-1/8″ 28-1/8″ 28-1/8″ 30-9/16″
211A-28 24-15/16″ 33-3/4″ 33-3/4″ 33-3/4″ 30-9/16″
211A-29 24-15/16″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 24-15/16″
211A-30 30-9/16″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 24-15/16″
211A-31 30-9/16″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 30-9/16″
211A-32 30-9/16″ 28-1/8″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 30-9/16″
211A-33 24-15/16″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 24-15/16″
211A-34 24-15/16″ 22-1/2″ 22-1/2″ 22-1/2″ 28-1/8″ 22-1/2″ 22-1/2″ 24-15/16″
211A-35 24-15/16″ 22-1/2″ 22-1/2″ 28-1/8″ 28-1/8″ 22-1/2″ 22-1/2″ 24-15/16″
211A-36 24-15/16″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 19-5/16″
211A-37 24-15/16″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 22-1/2″ 24-15/16″

Series 211A™ Boiler Dimensions (Cont’d)

Boiler Model Number Flue Connection Center Lines
“AA” “BB” “CC” “DD” “EE” “FF” “GG” “HH” “II” “FF”
211A-04 10-7/8″ 10-7/8″
211A-05 13-3/4″ 13-5/8″
211A-06 16-1/2″ 16-1/2″
211A-07 10-7/8″ 16-7/8″ 10-7/8″
211A-08 13-3/4″ 19-5/8″ 10-7/8″
211A-09 13-3/4″ 22-1/2″ 13-5/8″
211A-10 16-1/2″ 25-3/8″ 13-5/8″
211A-11 16-1/2″ 28-1/8″ 16-1/2″
211A-12 13-3/4″ 22-1/2″ 19-5/8″ 10-7/8″
211A-13 13-3/4″ 22-1/2″ 22-1/2″ 13-5/8″
211A-14 16-1/2″ 25-3/8″ 22-1/2″ 13-5/8″
211A-15 16-1/2″ 25-3/8″ 25-1/4″ 16-1/2″
211A-16 16-1/2″ 28-1/8″ 28-1/8″ 16-1/2″
211A-17 13-3/4″ 22-1/2″ 22-1/2″ 22-1/2″ 13-5/8″
211A-18 16-1/2″ 25-3/8″ 22-1/2″ 22-1/2″ 13-5/8″
211A-19 13-3/4″ 25-3/8″ 28-1/8″ 25-1/4″ 13-5/8″
211A-20 16-1/2″ 28-1/8″ 28-1/8″ 25-3/8″ 13-5/8″
211A-21 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 16-1/2″
211A-22 16-1/2″ 25-3/8″ 22-1/2″ 22-1/2″ 22-1/2″ 13-5/8″
211A-23 16-1/2″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 13-5/8″
211A-24 16-1/2″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 13-5/8″
211A-25 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 13-5/8″
211A-26 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 16-1/2″
211A-27 16-1/2″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 22-1/2″ 13-5/8″
211A-28 16-1/2″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 13-5/8″
211A-29 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 13-5/8″
211A-30 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 13-5/8″
211A-31 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 16-1/2″
211A-32 16-1/2″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 22-1/2″ 13-5/8″
211A-33 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 13-5/8″
211A-34 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 13-5/8″
211A-35 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 22-1/2″ 13-5/8″
211A-36 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 28-1/8″ 16-1/2″
211A-37 16-1/2″ 28-1/8″ 28-1/8″ 28-1/8″ 25-3/8″ 22-1/2″ 22-1/2″ 22-1/2″ 13-5/8″