(12-28-2021, 09:42 PM)tomh009 Wrote:(12-28-2021, 09:29 PM)taylortbb Wrote: No. I would say almost all new builds have individually controllable heating vs cooling. Some are WSHP, some are 4 pipe, some are air-based heat pump, some may be other technologies I'm not familiar with. But 2 pipe systems with fan coil units are effectively eliminated from new residential construction.
When did two-pipe systems stop being used in new construction?
I don't know. I had a conversation about building mechanical systems with someone from Momentum, and they were quite certain that they were gone.
Even my 1999 built Drewlo building wasn't like that, so I think it's been a while. It has a two pipe heat system, but an AC unit on the balcony. So cooling is available year round, though the central boiler was shutoff when outside temps passed 20. But each unit transitions from heating to cooling when they chose to.