Regular Boiler
Regular Boilers (also referred to as "heat only" or "conventional" boilers) only generate the heat for your central heating system (radiators) and hot water via cylinder. The hot water is stored in the hot water cylinder until it is needed, giving you a ready supply of hot water needed for your baths, taps and showers. If you have a Regular Boiler you will also have a cylinder, cold water cistern and feed & expansion tank (commonly found in the loft area).
Back Boilers which are commonly found behind fireplaces in chimney cavities are typically regular boilers.