Over the past several months this forum has been invaluable as a resource for helping me design and install a custom heating solution for my home. Unfortunately, my consultant has abandoned me at a critical time right when I need the pump control, buffer tank, thermostats, and DHW tank w/ heat exchanger for my radiant system. Can anyone out there help me complete my project?
For details, I am working with a local HVAC supplier installing a Waterfurnace Synergy3 geothermal unit that provides both water to water and water to air heating. The water to water function will heat an attached buffer tank acting as a low temperature boiler for my radiant heating. I have already installed heavy extruded plates plus non-oxygen barrier pex in a staple up installation for the first floor and inslab wet install in the basement. I have a total of 5 zones - 3 for the basement and 2 for the upstairs. I desire to take advantage of the unique features of the Synergy3 to provide the following functions:
1) Provide low temperature (120 degrees maximum) hot water for radiant space heating.
2) Provide supplemental and emergency forced air heating
3) Provide both AC and continuous hot water in the summer for DHW heat exchange
Through my local HVAC contractor, I have verified with Waterfurnace that above features are fully supported. My local HVAC contractor is experienced with geothermal but not radiant heating. I could work with Waterfurnance if necessary to design or provide additional information for an aquastat control. I need a consultant to recommend a final design including a plumbing schematic, pump control hardware, hot water tanks, and an electronic control solution with an outside reset feature. I was warned by Waterfurnance not to over design the solution. For instance, I was specifically warned that traditional Tekmar controls might not work as well using low temperature geothermal water source.
If you would like to discuss my project off line, please email me directly at