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I'm trying to size a Taco circulator for a 119 gal Superstor and having a tough time grasping the btu/hr requirement off my the boiler. Normally I would take the size of the tank and multiply it by 833 (8.33 * 100 delta T) but the Superstor catalog says you need 269,000 btu's for the 119 gallon...

For those of you who took HVAC for the 2nd half of the test, what type of licensed engineer do you become? Will your stamp say HVAC or Mechanical? I only ask because i'm currently a HVAC & Plumbing designer (going on 9 years), so I want to be able to engineer both systems when I become...