Using 1 long sheet metal screws mount the casing to the duct by running screws through the provided holes in the casing.
Humidifier water line hook up.
This aprilaire unit requires 6 screws.
That little nub cap on the valve is a drain port for draining the water out of the line when servicing it.
They are an easy and unreliable way to connect a humidifier to a supply line.
I know in many states the use of a saddle valve is now against code.
A flexible copper water line runs between the valve and the humidifier.
Which can add up one estimate i ve seen is that a average flow through humidifier discharges between 5 000 and 8 000 gallons 668 and 1069 cubic feet of water annually assuming a 17 week heating system with a call for heat 50 of the time in the city where i live evanston il which charges 5 46 100 cu ft that translates to 36 and 58 a.
Remove the cover and water pad from the humidifier and place the casing into the cutout on the duct.
That needs to stay removable.
I noticed the water line for the humidifier taps a hot water and not a cold line.
This was a surprise to me.
Depending on where that line is in relation to your furnace you may need to add a new line to the humidifier.
I needed to replace the crumbling humidifier pad on the aprilaire unit bolted to our new ng furnace.