In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
What about constant circulation and outdoor reset for an old high mass system
I have idea I'd like everyone's opinions on: I have client with a boiler with a bunch of cast iron rads, a high mass situation with big steel pipe (was maybe a gravity system originally), would it work to run the circulator continuously and change the controls to an outdoor sensor that would then vary the boiler temperature? Are there condensation or other issues if the output temp stays at something between 120 and 160? The house is small and has thin walls which likely had little insulation and leaky windows originally, now new windows and spray foam insulation are going to cut the load way down so I'm thinking comfort will go up if there are no big swings in temp from the system overshooting the thermostat setpoint because of all the water mass. Thanks in advance for your help and advice.