There are often occasions when space is at a premium and the fitting of an adequately sized traditional vertical cylinder is impracticable. This difficulty can be resolved by the use of a horizontally aligned cylinder available in either direct or indirect form, the horizontal cylinder is particularly useful for restricted loft spaces.
Boilers without burners and solid fuel boilers account for the remaining share. Boilers without burners are particularly popular in Russia, Poland and the Ukraine, where they account for more than 10% of each country's individual overall markets.
