Based on the BTU output of your boiler, the following is an approximation on which expansion tank to choose for your heating system.
BTU Output Under 50,000: #15
BTU Output 50,000 - 150,000: #30
BTU Output 150,000 - 200,000: #60
BTU Output 200,000 - 400,000: SX-30V
BTU Output 400,000 - 600,000: SX-40V
BTU Output 700,000 - 900,000: SX-60V
BTU Output Over 900,000: SX-90V
Expansion Tanks and Extrol Tanks can be found at www.supplyhouse.com
BTU Output Under 50,000: #15
BTU Output 50,000 - 150,000: #30
BTU Output 150,000 - 200,000: #60
BTU Output 200,000 - 400,000: SX-30V
BTU Output 400,000 - 600,000: SX-40V
BTU Output 700,000 - 900,000: SX-60V
BTU Output Over 900,000: SX-90V
Expansion Tanks and Extrol Tanks can be found at www.supplyhouse.com
