Abstract: A modular insulated water tank comprising a hollow insulated support structure, a liner, and an insulated cover, with the support structure being comprised of two or more separable, vertically stackable retention tiers, the liner being a flexible container capable of retaining fluids within the interior of the support structure, and the cover being capable of enclosing contents contained within the interior of the water tank. So configured, the modular insulated water tank is capable of retaining a large quantity of fluid, such as water, at an elevated temperature for an extended length of time, for purposes of using the heat energy stored therein for space heating purposes or for domestic hot water use.

Abstract: A modular insulated water tank comprising a hollow insulated support structure, a liner, and an insulated cover, with the support structure being comprised of two or more separable, vertically stackable retention tiers, the liner being a flexible container capable of retaining fluids within the interior of the support structure, and the cover being capable of enclosing contents contained within the interior of the water tank. So configured, the modular insulated water tank is capable of retaining a large quantity of fluid, such as water, at an elevated temperature for an extended length of time, for purposes of using the heat energy stored therein for space heating purposes or for domestic hot water use.