Here's a closeup of some of the internals..

I am totally envious. Heated and all- wow!

First thing I'd do is get all of the removable items out of there.
Looks like a bench on one side? That would be a perfect spot for lettuce. I've had great success using window box shaped containers that fit tidily along the edge. And lucky you - cooler weather is coming and lettuce loves cool.
Until you get the water going, you can always hand water.
Again - totally envious. Keep us posted - I'd love to follow you through this fun project.

Thanks for your comment! Each side has a raised platform with gravel in it. A center aisle. It's full of my pots from my (former) container garden at the moment. I think I should pull everything out and clean it first.

I can run water to it quite easily, as a 3/4" cold water pipe is on the other side of the wall. I'll T into that and go through the wall.

The heat comes via the duct you can see in the photo, it's just a straight shot off the back of the furnace into the greenhouse. Seems inefficient, but the thermostat is in the house, so whatever heat goes into the greenhouse would be controlled by that, not something outside.

I wish there were some schematic diagrams which explain how the roof would work, I assume it should open to release heat and close on its own via the motor..

I read your description and expected something really dumpy and sad, but then, the photos, wow!

You have lots to work with there, and I bet you're going to really come to like it. I'd say just start out by cleaning and organizing it, and see what ideas come to mind that seem appealing. You could start some fall lettuce crops, as Lori suggests. You can just grow them in containers on those benches. I use window boxes for lettuce as well, and it works beautifully. Herbs would work too since they are so quick. And I like to bring some pansies in the GH in late fall when everything else is getting knocked down by cold.

Over the winter, invest in a couple of books about greenhousing, like The Greenhouse Grower's Companion by Shane Smith, or one of the Elliot Coleman books. After that, see where it takes you. If perennials are your thing, you can grow really impressive seedlings in a greenhouse and save a bundle. If I were to move, the very first thing I would do to establish my new garden would be to get a greenhouse. Once you have that then there are a million possibilities!

Good luck!

Your GH is pristine compared to those in my Dad's commercial operation that I grew up in back in the '40s, and we were fighting decay all the time. I never saw a working GH operation that wasn't a little raunchy in places, and always being rehabbed. (Of course, I haven't been inside a working GH in 60 years.) Just clean up the corrosion on any iron/steel parts, get that vent system working, hook up a thermo-controlled damper on the heat, and have at it.

Imagine I’m too late but I have the original instructions for Everlite installation. I just restored an attached 16 ft model at my home in Cleveland, Ohio.

meppich11, it might be too late for the original post, but I just started a move and construction of a 16 ft Everlite model that I will be trying to reconstruct in my yard from memory. I am fairly confident that I can get it back together, but having a look at the original instructions would be amazing.

Hello! I am currently revamping a older Everlite model. You can purchase Everlite instructions at glassstructures.com. They also have the Everlite glass clips.

I’m a woodworker based in Ontario, Canada and am attempting to restore a vintage 8x10 Everlite greenhouse. Require a manual (not sure if the glassstructures.com would work and no way unless I buy to confirm. Anyone have one online as a pdf.