P-R206A-EN-C 199.5
20" 6" 61-5/8" 10.0" 11-3/4" 3/4" 2" 187
P-R266A-EN-C 266.0
23" 7" 62" 11.5" 11" 3/4" 2" 210
P-R336A-EN-C 332.5
26" 8" 63" 13.0" 10-5/8" 3/4" 2" 230
P-R406A-EN-C 399.0
29" 9" 64-9/16" 14.5" 12-1/8" 3/4" 2" 249
Residential, Cupro Nickel Heat Exchanger
P-R206A-EN-X 180.0
20" 6" 61-5/8" 10.0" 11-3/4" 3/4" 2" 187
P-R266A-EN-X 240.0
23" 7" 62" 11.5" 11" 3/4" 2" 210
P-R336A-EN-X 300.0
26" 8" 63" 13.0" 10-5/8" 3/4" 2" 230
P-R406A-EN-X 360.0
29" 9" 64-9/16" 14.5" 12-1/8" 3/4" 2" 249
Commercial, ASME Copper or Cupro Nickel
C-R206A-EN-(C or X) 199.5
20" 6" 61-5/8" 10.0" 11-3/4" 3/4" 2"
C-R266A-EN-(C or X) 266.0
23" 7" 62" 11.5" 11" 3/4" 2"
C-R336A-EN-(C orX) 332.5
26" 8" 63" 13.0" 10-5/8" 3/4" 2"
C-R406A-EN-(C or X) 399.0
29" 9" 64-9/16" 14.5" 12-1/8" 3/4" 2"
Designation for a AFT heater using propane gas is “EP”; a AFT heater using natural gas is “EN”.
Designation for a Millivolt heater using propane gas is “MP”; a Millivolt heater using natural gas is “MN”.
Prefix “C” is for cast iron (ASME) headers; “P” is for plastic (polymer) headers.
Suffix “X” is for cupro-nickel tubing; “C” is for copper tubing.
EXAMPLE: P-R406A-EN-X = Plastic headers, 406 model size, AFT, natural gas, cupro-nickel.
Reduce input 4% for each 1000 ft above sea level when installed above 2000 ft elevation.
For Canada, no de-rating is required for elevations up to 4500 ft
Plastic (polymer) headers cannot be used for ASME installations.
*Note: For outdoor stack, use J dimension in the table above for appropriate size PLUS six (6) inches