BioHeatUSA Un-pressurized Square Heat Storage Systems

Our square heat storage tanks are made of a lightweight, industrial-grade PVC liner with permanently welded seams. Built by the inventors of the Softank (the most copied tank in the solar and wood boiler industry), their modular design allows for fast and easy transportation and assembly by only one person. The individual panel sections are small enough to move easily through doorways and tight spaces. With exterior dimensions of 75 ¾” x 75 ¾”, the square tank fits the same space as an 822 gallon round tank, despite having over twice the wall thickness.

• 180 F degree continuous, 200 F intermittent rating
• Rigid, steel reinforced, 4.5” polyisocyanurate foam sidewalls.  4” polyisocyanurate foam top, 3” polyisocyanurate foam base
• R30 with thermal breaks
• Ships on one pallet and can be unloaded by one person easily
• No soldering in the tank, which speeds up installation and reduces the likelihood of liner damage.
• Domestic coil ships with integrated Sparco tempering valve.  The vertically-oriented coil is simply hung on the side wall of the tank.
• Space heating for 100,000 Btu boilers can be handled with only one coil.
• Limited residential warranty of 10 years for the tank structure, 5 years for the liner and coils.