manifold Termojet with flow meters for 2 outlets, stainless steel

The Termojet TJ-W manifold for 2 outlets with flow meters — stainless steel AISI 304, connection G1" – G3/4", length 180 mm. This is a compact solution for two-circuit underfloor heating systems: one zone is the bathroom, the other is the hallway or a small study. The flow meters allow balancing the flow in each circuit regardless of its length.

Technical specifications

Operating principle

The heat transfer fluid arrives from the main line through the G 1" inlet and is distributed across two independent circuits. A flow meter (rotameter) 0–5 l/min is installed at each outlet — a transparent housing with a float indicator. The installer sees the actual flow rate in each circuit and adjusts it with the shut-off valve until the calculated value is reached. Such balancing guarantees even heating of the floor in both zones even if the loop lengths differ. The M30×1.5 sockets on the return manifold accept standard thermal actuators for per-circuit zonal control.

Application scenarios

• Apartment, 2 zones. Bathroom + hallway or restroom + corridor — a classic two-circuit project. The compact length of 180 mm fits conveniently even in a small niche.
• Separate unit in a room. If the main system already exists and a new room is connected as a separate unit — 2 outlets are enough for one or two loops.
• Heat pump + underfloor heating. When connected from a heat pump, the low-temperature heat transfer fluid of 35–45°C is distributed precisely across the circuits — the flow meters prevent one circuit from "pulling" the flow to itself.

Advantages

• Stainless steel AISI 304 — does not corrode from heat transfer fluid with glycol additives, durable without chemical protection.
• Flow meters 0–5 l/min — precise balancing without expensive equipment, like in leading manifold manufacturers.
• M30×1.5 thread — the thermal actuator standard of most manufacturers; connection without adapters.
• Eurocone G 3/4" — connection of a PE-RT 16×2 or PE-Xa pipe without welding.
• Assembled kit — valves with thermometers, air vents, drain valve included.

Underfloor heating and the heat pump

A heat pump reaches a COP of 4–5 at a heat transfer fluid temperature of 35–45°C. This is precisely the mode that underfloor heating uses — it is the only one that can fully realize the efficiency potential of the heat pump. A manifold with flow meters ensures even distribution of the low-temperature heat transfer fluid across the circuits without overheating individual zones. More about the compatibility of underfloor heating and the heat pump — on the Termojet heat pumps website.

Frequently asked questions

How is a manifold with flow meters better than a manifold with valves?
A flow meter shows the exact flow rate in l/min on each circuit — the installer sets up the balancing by the figures, not by feel. A manifold with valves for 2 outlets is simpler and cheaper but has no flow indication. If the loop lengths are the same — valves are sufficient; if they differ — flow meters are needed.

Is a mixing unit needed for a 2-outlet manifold?
If the heat source is a boiler with a temperature of 70–80°C, then a mixing unit is mandatory: it will lower the supply temperature to a safe 35–45°C for the pipes and screed. With a heat pump the unit may not be needed — the heat pump already provides a low temperature. The system is always placed in a manifold cabinet No. 00.