Andy Hall wrote:


The Micromat is a well engineered and solid product with sophisticated
controls (all microprocessor based so no hardware reliability impact).
From an energy perspective it is saving between 25 and 30% as compared
to an old Glow Worm.

This is only a little less saving than a 'careful' [1] customer who I
installed a Keston25 for
earlier in the year. In his case the upgrade was from a conventional
flued Ideal Concord and very simple timer + plain copper cylinder with
(ragged jacket). Finished with
Grade 3 Part L cylinder (same size but with a fast coil).
All TRV (except bathroom as bypass).
Programmable Thermostat.

I think this finally put to rest the speculation about the maximum
savings acheivable by installing a condensing boiler.

[1] Notes and files gas bills etc.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html