Indirect Water Heater KOSPEL WP-120 double-jacket domestic hot water exchanger

KOSPEL WP-120 double-jacket indirect water heater is a domestic hot water (DHW) heat exchanger designed for connection to an external heat source such as a boiler or central heating system. The unit uses a double-shell construction that separates the primary heating circuit from the potable water circuit, allowing efficient thermal transfer while maintaining potable water quality. The exchanger is intended for installations where a dedicated DHW heat exchanger is required to provide a continuous supply of hot water for household use.

Advantages

The double-jacket design delivers efficient heat exchange between the primary heating medium and domestic water without mixing the two circuits. Construction materials and layout support reliable operation and straightforward integration with existing heating systems. The compact cylindrical body facilitates wall- or floor-mounted installation in plant rooms or boiler closets, while service access points allow routine inspection and maintenance. The unit is suitable for systems that require separation of potable water from the heating medium for hygiene and safety.

Suitable for

• Domestic hot water production in single-family homes and apartments
• Integration with gas, oil or solid-fuel boilers and central heating systems
• Replacement or upgrade where a separate DHW exchanger is needed
• Settings that require separation of potable water and heating medium for safety or regulatory reasons

Key specifications

• Type: Double-jacket indirect domestic hot water heat exchanger
• Function: Heat transfer from primary heating circuit to potable water circuit
• Application: Household hot water supply
• Construction: Cylindrical double-shell body with service connections
• Installation: Designed for connection to external boilers or central heating systems

How to use

Install the KOSPEL WP-120 according to local plumbing and heating regulations and the manufacturer’s installation instructions. Connect the primary heating circuit from a boiler or heat source to the exchanger’s primary ports and connect the potable water supply to the domestic water ports. Ensure all pipework is flushed and appropriate safety devices such as pressure relief valves and expansion vessels are fitted in the primary system. Commission the system by gradually raising the primary flow temperature and checking for correct hot water delivery and absence of leaks.

Usage recommendations

For reliable operation, use corrosion-inhibiting treatments compatible with potable water only in the primary circuit where recommended, maintain recommended water quality and perform periodic inspections. Routine checks of connections, seals and system pressure help extend service life. Installation and servicing should be carried out by qualified heating and plumbing professionals.