Hi everybody. I'm about to purchase a Max Caddy for my home and am considering a hot water loop as an option. I already have a tempering tank and plumbing from my old system, so the cost would be mostly the loop itself. My dealer indicates they aren't that effective since the loop is in the plenum and not the firebox hence, the water from the loop would not be very warm relative to my old system. Anybody have any thoughts or experiences with this particular add-on?