On 03/03/2021 14:27, John Rumm wrote:
On 03/03/2021 10:59, rick wrote:
After another 6 days withÂ* no heating ..... boiler repaired under
maintenance cover (burner, burner door, seal & electrodes), but
thinking it's time to look at replacing .... becoming pretty unreliable.
Its now 22 years old.
Its a 30kW Heat only wall mounted gas condensing boiler - connected to
a pressurised thermal store.

I need a standard/Heat only ..... can't use as system boiler (as
thermal store control need to manage pump)


Want to replace with 'similar' .... I did like idea of Vaillant
boilers with SS heat exchangers - but only offer these in System boilers.

They do the 400 series heating only models (mostly open vented, but some
also suitable for sealed system).



I contacted Vaillant support they were very clear that Heat only boilers
cannot be connected to a pressurised thermal store, they have to be used
open vented.
Pity as they are supposed to be god boilers.