LC110 Fan-Assisted Convector

The heating capacity of the STEKON LC110 fan-assisted trench convector varies depending on the unit length, casing width, water inlet/outlet temperatures, and fan speed. The values below are based on independent tests carried out by the ISO/IEC 17025 accredited HEATEST laboratory in accordance with EN 16430, the standard defining the performance testing of trench convectors (Test Report No: 017/2026). The values published in the catalogue are identical to these test results.

STEKON LC110 Fan-Assisted Trench Convector — Heating Capacity (W)
Water regime: 75/65 °C, room temperature: 20 °C

STEKON LC110 Fan-Assisted Trench Convector — Heating Capacity (W)
Water regime: 55/45 °C, room temperature: 20 °C

Question: Can the LC110 be used with a heat pump?

Yes. Since LC series fan-assisted trench convectors can operate at low and medium water temperatures, they are suitable for heat pump systems. With a casing height of 110 mm, the LC110 delivers significantly higher capacity than the LC80 of the same length, making it particularly advantageous in systems operating with low water temperatures.

Today, monobloc heat pumps using R290 (propane) refrigerant can provide leaving water temperatures in the range of 55–65 °C. This is an important development in terms of convector selection: the system can operate at a 55/45 °C water regime without having to drop to very low temperatures such as 45/35 °C, allowing a substantial portion of the unit's heating capacity to be retained.

LC110 capacity according to water regime

Example: A 2000 mm long LC110-240 provides 3,051 W of heating capacity at maximum fan speed with a 75/65 °C water regime, and 1,697 W at 55/45 °C. To meet the same heating load at 55/45 °C, the unit length would need to be increased by approximately 1.75 times, or a wider casing option should be selected.

At the same 2000 mm length, the 300 mm wide LC110-300 provides 2,206 W, meaning that in many applications, increasing the casing width is a more practical solution than increasing the unit length.

Where screed depth permits, selecting the LC110 provides an important advantage in heat pump applications. A 2000 mm long LC110-240 delivers 1,697 W at 55/45 °C, while an LC80-240 of the same dimensions delivers 1,371 W.

This difference of approximately 24% allows the required unit length to be reduced at low water temperatures, providing an effective solution particularly in spaces where the available length along the glazed façade is limited.

Points to consider in heat pump applications:

• Unit selection must always be based on the actual project water temperature regime. A unit selected solely according to 75/65 °C capacity values may provide insufficient output when used with a heat pump system.

• With fanless (SC) models, the reduction in heating capacity is much more significant at low water temperatures. For heat pump applications, the fan-assisted LC series should be preferred.

• The LC series supports 0–10 V proportional control, allowing it to operate in harmony with the modulating operation of the heat pump. Compared with on/off controlled units, this provides more stable room temperatures and improved overall system efficiency.

• It can be used on the same circuit as an underfloor heating system.

• The selection should be verified using Smartstep Selection by entering the actual project water temperature regime.