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  • paulmars's Avatar
    Today, 06:18 PM
    I just bought a new thermostat for my central oil HVAC unit. Honeywell TH4110D. I can set it for oil heater <90% efficiency or >90% efficiency. I'm...
    0 replies | 5 view(s)
  • paulmars's Avatar
    Today, 04:30 PM
    paulmars replied to a thread manometer accuracy in HVAC
    great tip. that would be more accurate. I asked dwyer and they just suggested their 400$ digital high range unit that was not any more accurate. I...
    2 replies | 72 view(s)
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