Fan convectors

We have replaced the lounge fan convector (admittedly 27 years old!) with a new one with half as much again nominal capacity. This (Myson) unit also has newer controls that are adapted to GSHP in that the cut-off for low water circulation temperature can be reset to a lower (32C) value. With various other changes this has raised the lounge temperature a bit, and stopped the convector blowing cold air when the GSHP goes off! FTR our fan convector is in a screw-closed box behind a decorative brass grille, and we leave off the official fan convector casing (just as with the old one) as this increases output significantly. The new unit also has a room temperature sensor (as opposed to a thermostat) which comes built-in but is quite easy to rewire to a remote location in the room (that is outside the wooden box!).

All the same we may still be limited as much by water circulation as fan nominal capacity, and I have raised the house circulating pump one notch (to middle of 3) which seems OK for now, though it is not very cold (-1 or so) at present so we shall see.