In our home, we heat hydronically. For summer cooling we have a Hi-Velocity HV-70BU by Energy Saving Products, LTD. It is a mini duct system, similar to the Unico.
For humidity, we have a White Rodgers HSP2600 (Same as the more familiar Skuttle Model 60). It is mounted on the return plenum of the horizontally mounted HV-70 BU air handler, just past the filter but before the evaporator, blower and UV light.
When the humidistat calls for humidity, the HV-70BU's fan goes to high (cooling mode) speed. Upon satisfying the fan proof ammeter, it allows the water in the humidifier's tank to heat. The steam rises into the plenum and is drawn through the blower and pushed into the ductwork. Upon satisfied humidistat, the heating element turns off and the fan continues until the water cools to 160 Degrees-F.
The challenges we face are that this unit is a maintenance nightmare and it is costly to operate. It has to be removed and de-limed monthly, despite a water filter and a de-ioinizing filter. Oddly, we have Detroit city water and it isn't terribly lime filled. The components of the unit also fail frequently and are costly to replace. Of course, a 2,000 watt heating element is expensive to run at 20 cents/Kwh.
But, I think today's problem has made me decide that the unit has to go.
I drained it for routine de-liming and found that the float was stuck in the "OK" position. This would allow the elements to heat when the pan is empty, such as when the fill valve is limed closed. That is scary.
When I first wanted a humidifier, I was told by several people that we have to use steam because the air in the air handler is cool, therefore a drum type or pad type humidifier would not work. This makes sense to uneducated me.
There were steam generator types on the market, but they were very expensive. Today, I can't find any on line.
I've been looking at atomizing humidifiers, such as Trion CB777. I also looked at some generic misting humidifiers that are used in hydroponics. (The hydroponic types would require some adapting to use in ducts.)
I am wondering if the cool mist produced by these will be carried to the house through the room temperature air ducts.
Also, would it be better to move the unit to the discharge side of the air handler, thus not pushing damp air through the blower and evaporator. (I recently had to de-rust and galvanize the blower wheel and housing. I assume the rust is from the steam.)
Does a cold mist system sound like it would work? Do any of you have a humidifier to recommend for our set up?
Thanks Very Much for helping me decide what to do about whole house humidification.