Just had a new boiler fitted and gas usage is up!. It’s a Baxi Assure 530 2 30Kwh
My previous Remeha Avanta Plus was only a 22Kwh and used to run nicely with the temp set at 17c during the day or 15c overnight, this one is nowhere near as warm so it’s set at 18c during the day at a minimum.
Water temperatures are set at 65c for CH and 50c for HW which is where the Remeha was also set.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!