Posts Tagged ‘btu’

Need help sizing a circulation /hydronic pump. Please help!?

Have 75,000 btu boiler, cast iron, with 1" supply and return. Using with a 79 gallon indirect, hot water heater /storage tank. Co. says flow rate for coil is 5gpm . They do not list pressure loss at coil. I am using 1" heat pex for supply and return to HWH. About 12′. What circulator should I use, please? Such as what size, series, Taco,Grundfos, Wilo ? Thanks!………………….

Solar-Passive: How hot will water in a 55 gallon steel drum get…?

.. on a clear sunny day, if it is placed in a well insulated greenhouse facing unobstructed, south facing windows?
I am trying to find the right calculations for this, but I am unsuccesful.
Other info:
42 degree latitude.
approx 500 BTU per sq. ft. a day.

follow up question, would a flat box shaped stell container ( same size) take in more heat gain, than a cylindrical steel drum? ( both painted flat black)

Book on hydronic heat. Who is the author?

An associate of mine loaned me a book a few years ago on hydronic heat.

Not very thick, but very informative about how radiant heat actually works. Included common piping strategies.

The author made several references to Levittown, Pennsylvania. He apparently did a lot of service work on those home's heating systems.

For example, he related how he was trying to find a broken pipe in a Levittown home. After explaining to the lady of the house what he was looking for, she showed him were the pipe was broken by mopping the floor and pointing out the big spot that dried quicker than the rest of the floor.

Wasn't a very old printing either. I believe there was an entire chapter on PEX piping.

He has at least one other book published. A reference book that listed BTU capacities and other specifics on old cast iron radiators.

Can anybody put a name to this author and/or the book's title?
Thanks dadcat, but no, that isn't it.

It wasn't an engineering or text type book. It was more of an informal discussion of the author's experiences and observations of hydronic heat mixed with technical references and schematics thrown in for practical applications.

Siegenthaler as the name doesn't ring any bells either.