Captain Obvious says to see Part 1 in "Prevent frozen water pipes (Part 1 of 2)"
I use a tiny (blue) bungie to hold the door closed up and the duct pipe in the correct position. This way the hot air coming out the slot blows directly on the water pump.
In order to hook the duct pipe to the heat vent I unscrewed the factory screws, then put them back through some little metal clips. These clips were made from wiring clips I found 15/pack at Home Depot. They took a little custom bending to work properly. They are similar to these I found today on the HD website: https://www.homedepot.com/p/Gardner-...1525/100125860
Tearing away a bit of the aluminum duct skin reveals the coiled wire support. I made four of these holes to line up with the aluminum clips.
The aluminum duct skin is fragile, and after a year or two of use needed reinforcing with some tape. I am a big fan of the Nashau 324 A tape. It is a bit spendy, but I use it for all sorts of things. It is true duct tape, made for professional HVAC work. Stays sticky even when cold. You should buy some; you’ll find plenty of uses for it.
Now the duct pipe easily and quickly clips in place over the furnace vent.
Save the duct box. You can store the duct pipe in it when not in use.
It fits nicely under the driver’s seat in the winter. In the summer I rotate it with my 12V fan.
The duct pipe has many other uses. It can serve as a hair blow-dryer.
Or can be used to heat the sitting or sleeping areas. When the bed is folded out, hot air from the vents underneath takes a while to warm the rear of the extended body van. My wife loves to insert the duct through the bottom of her sleeping bags in the morning. It is also long enough to reach sleeping bags in the upper bunk. So many people think we SMB types are so rugged to live in a van. Yet I consider it a life of luxury.