Circulator pump Termojet AUTO energy-saving APE 32/80/180 mm

Termojet AUTO APE 32/80/180 mm circulator pump — an energy-saving circulator pump of enlarged frame size with an ECM permanent-magnet motor and wet rotor. Installation length 180 mm, threaded connection 1¼″ BSP (female), power consumption 5–65 W, maximum head 8 m — the pump is suitable for large heating systems and buildings where the standard 6 m head is insufficient.

Technical Specifications

Operating Modes

Constant differential pressure — Δp-c. The pump maintains a set pressure difference between the supply and return pipes regardless of the number of open circuits. Optimal for radiator systems with thermostatic valves: the system remains balanced at any load level.

Proportional differential pressure — Δp-v. The differential pressure decreases proportionally as the flow rate decreases. Recommended for underfloor heating systems and mixed circuits: at partial load the pump automatically reduces pressure and power consumption.

Applications

• Large houses and cottages where the system requires more than 6 m head due to long or branched pipework.
• Radiator heating with 1¼″ threaded connection — the right frame size for boilers and manifolds with ports of this size.
• Underfloor heating in large rooms with high hydraulic resistance. Compatible with pump group NG-51.150 (180 mm) and NG-52.150 (180 mm).
• Replacement of an old 3-speed pump with installation length 180 mm and 1¼″ thread — direct connection without pipe modification.
• Heat-pump systems: the increased head allows serving an extensive underfloor heating pipe network.

Why the ECM Motor is More Efficient

A conventional 3-speed DN32 pump consumes 80–100 W continuously, regardless of system load. The APE 32/80 consumes 5–65 W — the permanent-magnet motor with built-in frequency converter adapts the speed to the current demand. In a real system the pump operates at 20–40% of maximum output for most of the time, drawing just 10–25 W.

Wet-rotor technology — the fluid cools and lubricates the rotor without shaft seals. No parts subject to mechanical wear: zero scheduled maintenance throughout the service life.

• Consumption 5–65 W — 1.5–3× less than an unregulated DN32 equivalent.
• Wet rotor — no maintenance required.
• Installation length 180 mm and 1¼″ BSP (female) thread — direct replacement of an old pump.
• Ukrainian manufacture: no customs delays, fast delivery, official warranty.

For Heat-Pump Systems

In a large house with an extensive underfloor heating system, the heat pump produces a heat-transfer fluid at 30–55 °C. The high hydraulic resistance of a branched network requires a pump with increased head — the APE 32/80 with Hmax 8 m and Qmax 4 m³/h meets this need while remaining in the ECM consumption class. For heat pumps for large buildings — Termojet heat pumps.

Frequently Asked Questions

When to choose APE 32/80 instead of APE 25/60?
The APE 32/80 is suitable when the calculated hydraulic resistance of the system exceeds 6 m, or when the boiler and manifold have 1¼″ ports. Also choose the APE 32/80 if you are replacing an existing pump with a 1¼″ thread.

Is the pump compatible with Termojet 180 mm pump groups?
Yes. See Termojet pump groups.