A pump group is a complete piping assembly for a heating circuit: a housing with thermal insulation, a space for the circulation pump, shut-off valves with thermometers, and — depending on the type — a mixing unit. A ready-made group reduces circuit installation from hours to minutes and eliminates assembly errors.
**Straight Groups (without mixing unit)**
Deliver coolant to the circuit at boiler temperature. Designed for radiator heating, domestic hot water cylinders, or swimming pools.
- **НГ-37** — straight group, 1", for circuits up to ~40 kW.
- **НГ-47, НГ-51, НГ-61, НГ-71** — straight groups of larger diameters (1", 1¼", 1½", 2") for corresponding capacities.
**Groups with Mixing Unit**
Fitted with a three-way mixing valve that blends return flow into the supply to maintain the set circuit temperature. Essential for [underfloor heating](/catalog/kolektory-pidloha).
- **НГ-38 / НГ-38А** — with mixing unit, 1".
- **[НГ-52](/catalog/nasosni-hrupy/ng-52p-zi-zmishuvachem-1-1-4)** — with mixing unit, 1¼", for higher-capacity circuits.
- **НГ-62, НГ-82** — 1½" and 2½" for large systems.
**Groups with Thermostatic Valve**
- **НГ-36, НГ-46** — with thermostatic valve for temperature control without external controls.
**Groups with A-413 Drive Controller**
A dedicated series with an electric actuator [A-413](/catalog/klapany/elektropryvid-keruvannya-postijnoyu-temperaturoyu-pro400) that automatically maintains a constant supply temperature. Convenient for underfloor heating without a separate controller.
**EPP Insulation Versions**
The EPP BLACK series — pump groups in a moulded EPP housing: superior thermal insulation, a neat appearance, and zero condensation.
**Which Pump to Install**
Termojet equips its groups with energy-efficient [APE and APM](/catalog/nasosy) pumps with electronic control — they consume significantly less power than older models, which is especially important when running on backup power.
**Advantages of Ready-Made Groups**
- Saves hours of installation compared to site-welded pipework.
- Factory-set hydraulics and balancing.
- Compact design and ease of maintenance.
Select the group by pipe diameter and the calculated circuit flow rate — see a separate blog article for the formula.