Rob R. wrote:
anthony7812 wrote:Both agreed that if a main circ were to be used i would be dead in water if it failed until new pump is installed. Dont want that with no other "main" heat source.
The same is true for the stoker motor, aquastat, zone control relays, and probably something else I am forgetting. Blower motor on a furnace is the same way, if it fails you will be cold. I don't think the system would be any less reliable with one circulator and zone valves vs. separate circulators for each zone. Also consider how much electric it will use. Zone valves and an ECM circulator like a Grundfos Alpha is a sweet setup.
As Rob R. says.......... My system has a total of 6 circulator pumps. My uncle's system has 1 circulator, and I think 4 zone valves. I don't see where my system heats any better than his. Just different ways of doing it. My system is called a "Primary / secondary". His system is called a "Parallel" system. So, what kind of system are you going to install? Series, Parallel, Reverse Parallel, or Primary / Secondary. If I remember correctly, the secondary part of a Primary / Secondary system can be plumbed in Series, or Parallel. I'm getting a little rusty since my research / studying of which hydronic system I wanted. I studied off & on for 4 years before getting serious about doing this project. Time was, and still is my big factor. That's why I had a HVAC friend give me a hand. Between myself, HVAC friend, and hydronic members on this site, the whole project went very smooth. Oliver