Humidifiers and Dehumidifiers - Recommendation for adding TrueSteam to DownFlow

I thinking of installing a Honeywell TrueSteam humidifier to a downflow gas furnace stacked on a A-coil evaporator with a supply entering the concrete. TrueSteam wants the steam injected to the supply side air, but my setup is not conducive to this type of installation.
Can I blow the steam on the cooling evaporator A-coils just above the concrete. I'm concerned about the sediment from the steam on the coils. Or can I install the nozzel just above the blower and having the steam enter from the top passing through - blower-heater-evaporator?

Thanks in advance for any input.

Air Flow
Flow
DOWN
____________
| Blower |
|----------- |
|Gas Furnace|
|------------|
| A-Coil |
| Evaporator|
|__________|
Concrete Slab
to supply air ducks

The TrueSTEAM is not going to work with your setup, and would not advise doing it onto the A-coil. The coil is going to be cool enough that the steam is going to collect onto it.