Answers to the questions you've been asking: PM's popular columnist John Siegenthaler gets
numerous inquiries from readers seeking his help with thorny problems in the field of radiant heat.
John responds: Of course you can! Be advised however that the four-way valve will control water
temperature about as well as you can drive a car with The ClubR permanently installed. Neither system
can react to changing input conditions, so neither can provide a stable output.