Bringing this back from the dead, since the project is back from the dead
Over the summer I have picked up a EFM stoker. A couple weeks back I took a weeks vacation and spent it in the basement
Tore out the old ductwork, moved the hot water heater, replaced the well pressure tank, move the oil boiler and EFM into the basement and set them in their final resting place. Rewired and replumbed the water heater and pressure tank. And removed some old water softener tanks (why they were ever installed is beyond me, our water is perfect!?!?)
So now I am getting real close to starting the actual install. The old heating system in this house consisted of a oil furnace with a grand total of three registers, two in the living room, one in the kitchen. We've been heating the rest of the house with space heaters. I have ~50' of finned copper baseboard, and picked up 30' of cast iron baseboard this evening. I am picking up another 70' of CI baseboard tomorrow. Plus I collect two toe kick heaters, one for the kitchen, the other?
Question for anyone that has messed with the cast iron baseboard. There are tow passages in these things. The set I picked up tonight is only using the upper. Can the second passage be used as a return?
Current thinking is creating five zones in the house. The first floor (kitched, dining room, living room), one for each bedroom on the second floor (2 total), one for the landing and nursery on the second floor, and one for the third floor. I am planning on using 1/2" Pex-AL-Pex for each zone.
The first floor will consist of three loops, one to a toe kick heater in the kitchen (30' each way). One for the Ci baseboard in the dining room (maybe 10' of Pex each way), and one for the living room (~10' each way)
On the second floor, each bedroom has a ~150' total run of Pex to and from the baseboards. These room are easily heated by a electric space heater, so the 8000 btu heat loss the program is predicting is probably high. Regardless, I am planning on a 14' length of baseboard. The landing and nursery are going to be tricky and I haven't decided exactly how I am going to do it.
Finally, the third floor is a single 16' x 30' room, again with a ~150' total run of Pex. The finned baseboard is probably going up there.
Given all that, any opinions on using 1/2" Pex-AL-Pex for the runs?