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Prefab Green Home Net Zero Off Grid Systems Post #3

An astute reader took me to task yesterday regarding our prefab net zero green home, the casa ti. : )

Correctly, they observed,
Just read the #2 on systems. It brings up what I was saying - where the heck are you going to put two 80 gallon water tanks? The plans shown on-line do not have space for 1 much less 2 water tanks. Are you putting them outside? Where are the PEX tubes for the floor terminated (meaning where do they come out of the concrete? In a closet somewhere or outside the house)? You'll need a pump for each loop and they take up a fair amount of space also (about the size of a coffee machine mounted on the wall).

Handsome Husband (who is responsible for our prefab’s off grid / net zero systems) responds:

“The green building architect David Day's prefab floor plan shows what I am using as a system cabinet as kitchen storage.

Here is a detailed view of the cabinet that houses our net zero, off grid systems.

We are keeping the footprint the same but are converting storage to system space to accommodate the prefab house’s added solar tanks and radiant heat needs.

Space needs vary between different heating and DHW solutions and in our case where we are off grid we are dedicating more space to the system needs than others might. 

But then again, we are going off grid all the way and are willing to create that lost storage in furniture instead.

I will post the corresponding system specs over the next few days once I have transferred them to digital media.”

So, like many other consumers, we took the prefab architect’s suggested floor plan for the prefab house kit and modified it for our own needs with our contractor.

Not only did we move the kitchen from the west to the center of the south room, but we also adjusted the green building architect’s suggested dimensions for closet space to accommodate our net zero off grid needs.

Here are some pictures so you can see how easy this is to do with your contractor as the bedroom dimensions are currently just laid out / framed:


Here is a link to the green building architect’s suggested floor plan of the prefab so you can see what the architect envisions, which you can compare with what we’ve done as our own prefab house kit consumers…

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