If the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer. The third controller type provides proportional with integral and derivative control, or PID.
Noise figure. Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio-frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, with lower values indicating better performance.
MPR Ratings vs MERV Ratings. Although I wasnât able to find a chart created by the manufacturer I did collect some data from the web and created this chart to compare the two rating systems. The difference between the two rating systems is MPR measures .3 to 1 micron particles and MERV measures .3 to 10 micron particles.