Just an update...
The GH should be arriving next Monday as per the latest from the shipping company. The total weight of all the pieces is about 1400 +/- lbs in 2 boxes, one cardboard and one a crate. It's curbside delivery, so we'll have to open everything up and haul it to where we plan to store it until we build it.
The greenhouse has front and rear double Dutch doors, and 4 roof windows with automatic opens. I also wanted an automatic ventilation system, but I didn't buy it from the GH company. I bought it from a distributor of the manufacturer that the GH company buys the system from. I saved just about $200 by doing it this way.
J&D Manufacturing Shutter Mount Direct Drive Wall Exhaust Fan (20", 1/3 HP, 3,126 CFM @ 0" S.P., 115/230V, 1 Ph. - Single/Variable Speed with 10' Cord, 115 Volts
J&D Manufacturing Motorized Aluminum Intake Commercial and Agricultural Grade Power Shutter (24" x 24" Power Shutter with 10' Cord, 115 Volts)
Single Stage Moisture Proof (Piggy Back) Thermostat Control w/Cord
Spent a good amount of time a day or two ago researching Phase Change Material (PCM) and its use in the greenhouse. It takes up the least space of all thermal gain/heat sinks and holds more heat than water. I am looking more closely at it as a replacement to black barrels filled with water.
Phase change materials (PCMs) are substances which absorb or release large amounts of so-called 'latent' heat when they go through a change in their physical state, i.e. from solid to liquid and vice versa.
I remember reading about PCM a few years back, but it wasn't available to John Q. Public back then.
Here is a link that explains the technology:
https://insolcorp.com/services...
Here is a link to the product:
https://insolcorppcm.com/produ...
Each tile contains 400 BTU of thermal storage.
I decided to go ahead and order a case of the phase change material to test in my present greenhouse. The box is 9 tiles for a total of 36 square feet. I took advantage of their 10% off, so the box cost $157.50 instead of $175. Using it for a while in my old greenhouse will help me decide if I want to order more tiles for my new greenhouse.
I have also contacted a company called Site Prep.
https://www.siteprep.com/ for a free estimate of what it would cost to have them come in and install the wood foundation and gravel pad. I took some pics and elevations today, and I am going to send them the details tomorrow.
Of course, I would have the old greenhouse, raised garden, slates, etc. removed before Site Prep did their work.
The drop in elevation from the front left side to the front right side is just about 10".
