Can anyone tell me how many BTU's a Weil McLain Boiler model # P-568-WT is? We are trying to figure out if we can run a 40 gallon indirect fired hot water tank and 175 sq ft of radiant floor heating off of our existing boiler. The house is 1400 sq. ft. including the kitchen and half-bath which is the 175 sq. ft. we want to heat with radiant. Thanks in advance for any help you can give us.