That's OK Ian .. but where would the support be, and how long would it take to fix (let alone the expense) should the need arise? And my experience tells me that this "could" be problematical for this gentleman. This type of system always invariably is. He would, I am sure, want something he can always get a local plumber to look at, or get spares in Cork.

I'm looking at the options for you Rob .. but a small good-quality brand combi would be my choice. You dont strictly need a mains water supply, as you can fill/pressurise the system from a hose, but it would be best, as you can then utilise hot water if you need it. Plumbing work would be less intensive than the electric option, plus there would be no NOISE in your theatre