The only bladder tank solution supplied in a steel frame with pipe work fixed via a steel mounting plate...." The eco sac® water bladder tank is the preferred water bladder solution of architects, designers and hydraulic engineers - and it is the best under house and under deck water storage solution for you. It stores more water per square metre than any other bladder tank; it has the largest range of standard sizes available in the market.
$49.95. I love this for the price and it heats a room 10 x 25 (250 sq ft.) and also has a timer that can be set to turn the heater on automatically!!! The Wall Outlet Space Heater - Hammacher Schlemmer