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Currently I have Honeywell CM67NG controllers with associated HC60NG relay box and the destruction's state that the CM67 can instruct for % burn. but as my Potterton Osprey does not support anything less than "foot on the floor economy style" I have not looked further. I believe that their HR80...

Fair point and the one over which I'm stumbling. :( I look at boilers and the own brand controllers. They don't seem to do what I feel I want/need. Often its only by reading the IM that you find they do a controller. Intergas come to mind here. If I find what seems like a suitably...

Isn't there the cost of a comfy chair and window (by the boiler) to be considered or can you get wireless temp adjusters too :wink:

OK so WC improves a little on a plain condensing boiler and putting a wooly jumper on helps to BUT does all this intelligence live wholly in the programmer/thermostat or would the boiler do its best to be efficient without the new fangled all singing and dancing controller (with WC :wink: )...

Bit of a question, surely the boiler is able to regulate its burn even with a simple thermostat (ok perhaps not so efficiently) OR is it utterly dependent upon the thermostat/programmer for economical functionality? If its the thermostat/programmer that's doing the work then who makes the...

Almost sounds like a Low Loss Header but with almost nil capacity. From other threads it seems the larger domestic boilers suffer these cycling probs could this be a fix?

Is it at all possible that your weather compensator is not on the N or N/W side of your home ? Seems to me that something like that could well confuse the daytime temps you achieve especially as you seem to quote measured temps rather than body perceived temps.