First off, I want to say thanks to all whom contribute to the forum. After several months of going through the pages here, I finally took the plunge and ordered a Tarm 40 - Now the real fun begins!
I'll be using the Tarm as primary and the old oil boiler as secondary. The current piping configuration uses (6) zone valves (5 for the house, 1 for the DHW). My installer recommended swapping them out and using circ pumps instead. The upside is I wouldn't rely on a single pump, but the downside is I may see an increase in electrical cost. Can you foresee any further pros/cons ?
I'll be using the Tarm as primary and the old oil boiler as secondary. The current piping configuration uses (6) zone valves (5 for the house, 1 for the DHW). My installer recommended swapping them out and using circ pumps instead. The upside is I wouldn't rely on a single pump, but the downside is I may see an increase in electrical cost. Can you foresee any further pros/cons ?