We have a Buderus Logano 215 boiler with Logalux ST hot water heater
in a large home. There are three radiant and twelve baseboard zones.
The valves are all Taco as are the pumps. (there is a main circulator
pump, one for the hot water, plus three for the radiant zones) The
system works fine, but the main circulator pump makes an awful hum.
The heating contractor says I have to live with it, but I don't want
to. Several folks here said that Grundfos makes a quieter pump, but
the contractor says they are not as reliable as Taco.

Are there any experts here who can help? Thank you.
--

Larry
Email to rapp at lmr dot com