Quote:
Originally Posted by Luckypants
It is not just combis that can modulate the burn, or limited to gas only. Modern boilers should modulate the flame to try to keep the boiler in condensing mode (the most efficient) but obviously the ones that do this successfully are also the most expensive to buy.
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Modern oil boilers can condense but they cannot modulate as such by turning down the flame like gas boilers.
IIRC ..