In message 47712c25@qaanaaq, Andy Hall writes
On 2007-12-25 15:47:12 +0000, "Graham." said:

Why are the letters Y and S used, what do they stand for?

They are two of the so-called Sundial plans

http://content.honeywell.com/UK/homes/Sundial.htm

It would be interesting to know whether anybody at Honeywell still
knows what the letters mean, if anything. I bet they don't.

Do their new SmartFit plans have any real advantages?

--
Si