Heating Help

radiant loop

thanks for all the help so far on the addition of a simple radiant loop for my bathroom...

I've got what hopefully is one last question. I am keeping my bathroom loop simple - basically doing what dan illustrates in one book by tapping off of a supply line, into a 3-way mixing valve, circulator pump, through the radiant heat, and back to the original baseboard loop.

My question is, my main heat is set up as a direct return system --- so on my return line from my radiant heat, should I tie it back into the supply line I initially pulled off of (with a closely spaced T), or should I pipe it to the return line.... hope that makes sense.

My initial thought would be to pipe it to the return line to send it back to the boiler - but since there is a second circulator on the radiant system, would that disrupt the main circulator for the baseboards down the line?

addition...

i should add that this radiant loop will be powered by a circulator that is tied into the main circulator.... so there will never be a time when the radiant is on/baseboards are off or vice versa.

use a close tee

Also use a separate pump control, but wire the low voltage in parallel to the first if simultaneous operations are desired.

any reason?

what would be the harm in piping the return to the main return in this case? Just curious...

and won't piping with a tee possibly create cold radiators down stream?

return

If the water does not go back where you take it, you'll through off the flow too much to the baseboard loop.

deleted

makes sense

thanks... that makes sense.  i'm a little concerned that appx 100 degree water is going to be following downstream to another radiatior... but I guess the flow of the radiant loop is small enough (less than 1gpm) that it should mix with enough hot water