heat exchangers

We have a Central Boiler CL 5036 and we think we are losing too much heat at return and need help troubleshooting. We have temp gauges at the boiler that measure outgoing and incoming water temp and we have noticed that when the furnace is running we are at a 40-50 degree difference (loss). I.e...

Hey everybody, I plan to purchase a Ridgewood 1500 in the upcoming future. My home is about 1200 square feet, and I plan on installing the Ridgewood to accommodate radiant floor heating. I am thinking about going with 4-5 loops, not sure on the size of each loop yet but roughly 200ft-300ft per...