℃ .heating mode: available ambient temperature range-12~24

Built-in Circulating Water Pump

Standard built-in circulating water pump significantly saves the installation work on site

Unload Valve

The unload valve is used for close water system, when the pressure increases to a certain point, the unload valve will automatically open, which can protect the system from high pressure danger

Expansion Tank

It has the effect which can keep the balance of water flow and pressure, avoid unload valve frequent opening and water

supply valve filling water frequently