The Current Setup
We currently have a 96MBH boiler supplying our single level, 1100sqft ranch house with both heat and domestic hot water. The boiler is a real champ and never runs out of hot water no matter hot long you keep a shower running or whatever load is needed. The boiler has one supply line and two returns, with each return having a separate circulating pump (no zone valves). Almost our entire house is on 1 zone supplying hot water to heatilators under each window. The second zone only supplies a small 10'x10' entrance room with newer baseboards. The open basement and single level house make it very tempting to install radiant heat.
I want to combine the smaller 10'x10' baseboard room/zone with the large whole house heatilator zone, then add the new radiant manifold as the second zone. If possible, by combining the two existing zones into one, it will not require to much extra equipment or changes to the overall system. The one thing I am not very know legible with is the various types of controllers and relays so I was hoping to just tie into the existing system and avoiding messing with these to much. I am fairly comfortable with sweating pipes and the various types of valves/components and when they are needed. I always have my work checked by a pro (friend).
Does anyone see any problems with this plan or have any advise or feedback?