I have a newish gas forced hot water heating system that is talking
hours to move the temp in the house a few degrees. The house it
small, 1000 sf, and tight and it is only 30 degrees out.

My heating system has one Taco cartridge circulator 007-F5 and the
body of the cartridge is extremely hot and it is silent except for a
little hum on the electrical control. It is placed on the return side
of the line and there the line is warm but not hot. The radiators are
warm but not hot.

Is this normal?

Thanks

fconsig at yahoo dot com