Small heat exchange area, low efficiency
As tank expands and contracts, copper coils move away from the tank.
Copper changes over time to reduce heat exchange surface area.
Large heat exchange area, high efficiency
As tank expands and contracts, flat coils continue to adhere to tank surface.
Microchannel design retains shape even under 110kg of pressure.
Because heat transfer is so much more efficient with flat coils, A. O. Smith heat pumps have the highest energy efficiency in their category in both USA and China.
Copper coil users enjoy high energy efficiency at the start, but this drops drastically over time as the copper is malleable and changes shape easily under heat.
A. O. Smith heat pumps maintain their high levels of COP even after 10 years of use.
High heat transfer technology means users get more hot water. Our heat pumps attain temperatures of 65°C, while many others can only go up to 55°C.