wrote in message
The plumber
ran the PEX tubing throughout the floor and down to a new zone in my
oil burner with a mixing valve. My question is what the correct output
temperature should be? 125 degrees or so? The PEX tubing says 180
degrees on it.

The tachometer on your car probably red lines at about 6000 RPM, but that
does not mean you should run the enngine at the speed all the time.

PEX says 180 as that is the maximum setting. It should be run at about 125
to 130.

Also, should I get a specialized radiant heat thermostat like the
Wirsbo model? I don't think it's programmable, which would stink.
Opinions? Thanks!

I don't know about them.