The Superb, Newfangled Combination Boilers Site

https://squareblogs.net/personvpsk/facing-off-with-o-muse-leading-competitors-in-the-market

Combination furnaces are space-saving, energy-saving systems which provide both heating and warm water on demand. Perfect for smaller homes, they remove the requirement with regard to a detached water tank, providing ease of use as well as amenity