Cap. 30,000 KCals/hr to 10,00,000 KCals/hr. Low investments, low running expenses. Easy to operate. Occupies small floor space. Two pass design hence easy for cleaning & maintenance. Shell type combustion chamber and shell & tube type economizer. This type of design increases efficiency and tolerates a high degree of hardness in water. Available in two types: a) Shell type standard b) Coil type All standard indigenous parts ensures easy availability of spares.