I have an old 3 story brick building with limited insulation. Approx 3000 sq ft in total.
- The boiler size is 225k. It's about 10-15 years old. Most likely oversized.
- there are 3 total loops. Each loop is a two pipe (approx 2"-3" each) reverse return system
- I measured the supply pipe 131F and the return pipes at 123F. All 3 loops gave about the same readings.
- Rooms have Cast iron radiators of various sizes
- The current aquastat setting (Honeywell high limit L8148E) is 160F.
- The thermostat has 3 remote sensors - it is reading the 3rd floor sensor, which is the coldest room, set at 72F.
- I limited the thermostat to 3 cycles/hour.
I measured the supply pipe temperature by touching a probe onto the pipe.
Should I increase the aquastat to 180/190?
Would a higher aquastat setting lower the heating bill?
Would a higher aquastat setting create a more comfortable temperature?
Also would appreciate your feedback on "short cycling" and "flue condensation", which I don't know too much about.
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