On 18 Aug,
Roger Mills wrote:


BTW, a 30-year-old boiler ain't going to modulate!

The house I rented 34 years ago had a modulating boiler. It wqs a hugh wall
mounted one, IIRC servowarm. It's only control was the modulation to keep
water temperature (approximately) constant, the pump was permanently on. I
remember little else about it.

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