A heating contractor, who’s tired
of coaxing 500-pound cast-iron boilers into homes, decides to try out a
wall-mounted mod/con boiler because of its light weight and side wall venting.
An
installer is advised to use a buffer tank to prevent short cycling of a low
mass boiler serving several independently controlled space heating zones ...
The
installer got a great price on a “contractor pack” of 3/4-inch copper tees, so
the supply and return manifolds are built with 3/4-inch copper, as are all the
zone circuits ...
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