Can anyone recommend a relay (or make of relay) please? I'm going to
have to build some logic for a central heating system.

Immutable parametrics a

DIN mount,
6A AC restive (with a good slice of inductive, enough for a CH water pump)
230V contacts and coils.
SPST is sufficient
Reliable long term.
No solid state - I like the simplicity of mechanical.


Quietness is not important.
Pluggable is cute but not essential if reliable.
Isolation (3mm contact gap) is not required.


It's easy enough to pick a random one from Farnell, but I'm out of touch
with who the good makes are and there's so much junk manufactured these
days.

Cheers! Tim