The EP-037 evaporator pad is designed for the Hamilton model 12HF, and will also fits the Trion model CM200.
Our EP-037 is the OEM replacement evaporator pad and will fit our Hamilton 12HF as well as the TRION CM200 humidifier.
Sorry, this evaporator pad is not designed to replacement on that model.
This evaporator pad looks similar to the OEM part, however, it designed for the Hamilton 12HF model.
This pad is unique to the Hamilton Model 12HF Humidifier. It will not work for the Aprilaire 500.
The EP-037 is OEM evaporator pad designed to fit the Hamilton 12HF humidifier only.
The dimensions are mentioned in the description, but I measured the thickness at 2". 10" x 10" x 2"