Hi Jon,
This is basically what my mate has been using for the last xx years in his cycle shop. He turns it on at the plug when he needs it (it's pretty quiet) and I thnik is still left in the (small) fridge complete with temp sensor . I think he uses the fridge itself for storage! The outlet is just a flexy hose with a std car valve fitting (no gauge or trigger, you just hold it on and feel the tyre for pressure) and it pumps a std cycle tyre up in just a few seconds?
I think he might be on the second one in loads of years ...(but has a very short duty cycle in his application).
All the best ...
T i m