A BS 3198 Double Feed Indirect (DF) Combination Cylinder.

Insulation
Fortic F4 has a single thickness of C.F.C free urethane foam lagging as standard, this adds approximately 50mm to the cylinder diameter.

Fortic F4 is available with a double thickness of C.F.C free urethane foam lagging as standard, this gives lower heat loss and adds approximately 100mm to the cylinder diameter.

Height	Diameter	A	B	C	D	Hot	Cold
mm	mm	mm	mm	mm	mm	litres	litres
1200	450	790	370	700	400	115	35
1300	450	890	440	800	400	130	35
1400	450	985	440	900	400	140	35
1850	450	1435	520	1350	400	206	35
1200	500	800	520	720	370	145	40
1700	500	676	370	596	1007	115	160
1700	500	918	520	838	766	160	115
2050	500	576	370	596	1359	115	228