Are you looking for a Food Computer and half, or Food Computer Squared? MIT has made a Food Server, and they are working on a Food Data Center. However the costs and scale are completely different.
The Fans provide a specific amount of CFM, if you start changing the dimensions of the unit too far, you made need beefier equipment. Grow chamber lights fill the entire box, actually it looks like the box dimensions revolved around the grow lights and the wash basin more than anything else. The height may be subject to change to let the plants grow larger.
EC and PH, those sensors are a work in progress. The ones in the BOM are pretty weak and unreliable (so I have heard) so you need to treat them well and flush the unit head with water/solution before storing between measurements.
Temperature, Humidity, CO2... those could scale further in my opinion.
Heater..... that's the question, the little unit does put out considerable heat and volume... you may get away with more.