Constantin HELLO & A ??? or 2

You rang?

Vitocell V300B, lower coil on the H30 solar system, the upper on the Vitola VB-33 w/Vitoflame 100 oil burner.

The GFX is all-copper construction... 4" ID, 4 parallel loops of 1/2" pipe wound around 72" of drain pipe. The model would be a G4-72-4, IIRC.

Sorry, no desuperator! Interesting, to say the least, but probably not all that practical in an area like ours where it'll be a while before the AC comes on...