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Boiler failed/Gravity-to-circulating conversion
Good morning from Essex County N.J.!
Our 1955 boiler has gone to meet its American Standard maker, and is leaking. I'm trying to scope the job as efficiently as possible. Any advice would be appreciated.
1) Do you know a hydronics guy in this area (Essex/Morris/Union Counties, NJ.) who's converted gravity to circulating systems?
2) Are there any photos you'd like to share of the primary/secondary piping loops Dan talks about in 'How Come?' and 'Pumping Away?' I want to show my plumbers a picture in addition to a schematic.
3) Has any body used a reset control with exterior temperature sensor in NJ to allow for cooler boiler temperatures in the shoulder seasons?
4) The current system has (approx.) 2-1/2" pipes on the return and maybe 3" on the supply, two each. Should we try to keep these 'loops' separate zones in the secondary loop? Being a gravity feed system, each loop heats half of the first AND second floors. Not a zone-by-floor option. Or is it better to make it one big loop?
5) A 2-story extension (circa 1989) has no heating at all, other than electric baseboard. I may want to install (someday, not today) a radiant loop in the first floor which is over an unheated crawl space. Would I be wise to plumb in a pickup for that system in the secondary loop?
6) Boiler sizing -- it should be sized for the total heat loss (including the unheated extension) right? Therefore, 'in theory,' the boiler would be sized properly for the whole house when I go to add the radiant loop, right? I'd just be under-radiatored until that system goes in. But let me know if I'm overlooking something.
7) I'll try to get some pix up on this post (like it is not long enough.) I hope that once the Honeywell Heat Generator and its 30 odd lbs of mercury is removed and the supply/return pipes in the secondary loop are downsized for the circulating pump, that I'll have room to push the furnace back a foot or two against the brick chimney stack. That'd give more room in that part of the basement. But maybe I am hoping for too much.
Just an ignorant homeowner here-- and grateful for any advice on one or more of my questions.
Thanks to all the contributors to this board -- it's the Royal Academy of heating.