If It Looks Like a Duct...and Quacks Like a Duct...Then is it a Duct?

We have ductwork all over the place. In great large coils. 

Here they are laying it out to piece together.

Here they are staging it to go under the house...

...and here they are putting it in thru the house instead of outside in the crawl space. I have no idea where all the duct work is going as it looks like there's more there than there is house.

And there's more to be installed!

In the meantime, the old heating unit stands abandoned

...it worked hard for 28 years, but it's being replaced with new technology that will be energy efficient. I hope the new unit is as good as it's supposed to be.