Honeywell H1008 Rev 2.0 63-7048 1998 Honeywell Inc., Page 14 of 22

Rev 2.0
63-7048 1998 Honeywell Inc.
Page 14 of 22
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Fan Cycles (G) Furnace Cycles (W)
Humidifier Cycles
Outdoor Temp.
Dewpoint
Window Temp.
Temp. Setpoint
Room Temp.
Time
Temperature (oF)
Digitial Output
Figure 10 – Field Testing of H1008 Automatic Humidity Control
March 11, 1998 – Minneapolis, Minnesota
Figure 10 is actual data logged from a home with the H1008 installed during last winter.
Performance is again excellent, with dewpoint tracking just below the window
temperature. Cycling of the humidifier tracks closely with the outdoor temperature;
relatively light cycling during the colder portion of the day, and heavier cycling during the
warmer portion.
In addition to demonstrating the excellent performance of our humidity control algorithm,
controlling by dewpoint, the field test program also highlighted some serious
shortcomings in an approach utilizing control based only on relative humidity, like the
AutoTrac. These findings are summarized below.