Volano UP GBL (A Class) — High-Efficiency 4 Connection Mild Steel Buffer Tank (Outdoor)

Volano UP GBL (A Class) is the premium, high-efficiency version of Cordivari’s wall-hung buffer tanks. With upgraded insulation, a rigid metal outer jacket, and Energy Class A performance, it’s designed for air-to-water heat pumps and hydronic systems where every standby BTU counts.

Key features

• Energy Class A insulation – Thicker, high-performance insulation reduces standby losses compared to standard buffer tanks, improving overall system efficiency.

• Wall-hung, compact design – Vertical, wall-mounted tank keeps floor space open in tight mechanical rooms or closets.

• 4-connection layout – Two connections for the heat source and two for the system circuit make piping straightforward for contractors and designers.

• Premium metal outer jacket – Clean, durable metal shell provides a more robust finish than plastic or PVC jackets and looks at home in exposed utility spaces.

• Sized for high-performance residential systems – Four models from 12–100 liters (~3–26 gallons) to support a wide range of heat pump and boiler applications.

• Stabilizes heat pump operation – Adds buffer volume to reduce short cycling, support defrost cycles, and smooth out flow in zoned or variable-speed hydronic loops.

• Hydronic use only – Designed for closed heating and cooling loops; not intended for potable domestic hot water.

Typical applications

• High-efficiency air-to-water heat pump systems

• Hydronic heating and cooling loops with zoning or variable-speed circulators

• Projects where designers want lower standby losses and a more architectural appearance than a basic buffer tank

(See Technical Documents below for full Volano UP GBL (A Class) technical data, dimensions, and connection sizes in U.S. units.)