British Gas 330 boiler modulating protocol

[BlueSands]

Hi all,

Just moved into a house with a British Gas 330 boiler and would like to fit a modulating smart thermostat.
Does anyone know what modulation protocol it uses?
I've googled, checked the manufacturer's website ( Glowworm ) but with no luck.

Boiler ID GC 41-047-75

Thanks!

 

[ShaunCorbs]

It’s a heat only so you can’t fit modulating smart thermostats

 

[BlueSands]

It’s a heat only so you can’t fit modulating smart thermostats

Thanks!
Given this boiler was installed around 2005 when should I be replacing it?
Also would a new boiler be significantly more efficient?