HJM Manuals & User Guides

HJM (Hermanos Julián M., S.L.) is a leading Spanish manufacturer in the HVAC sector, specializing in high-quality electric heating solutions. Based in Salamanca, the company designs products that combine durability with modern energy-saving technology.

The HJM product portfolio includes:

• Thermal Emitters: Ceramic and fluid inertia radiators for efficient room heating.
• Towel Radiators: Programmable electric rails designed for bathroom comfort.
• Portable Heating: Ceramic fan heaters and auxiliary heating devices.
• Ventilation: diverse range of fans for industrial and home use.

Committed to quality and innovation, HJM products typically feature sophisticated electronic controls and safety systems.

• How do I reset my HJM radiator thermostat?

  Many HJM programmable thermostats can be reset or reconfigured via the "Mode" button. Refer to your specific model's manual (e.g., PECS or RFCS series) for the exact button combination, as digital interfaces vary slightly.

• What does the "Open Window Detection" feature do?

  This energy-saving feature detects a sudden drop in room temperature, which usually indicates a window has been opened. The device then stops heating for a set period (often 30 minutes) to prevent energy waste.

• Who do I contact for HJM repairs?

  For technical support or repairs, you can contact the manufacturer directly at hjm@hjm.es or call +34 923 22 22 77. Always ensure you have your purchase invoice and product details handy.

• Can I install HJM heaters in the bathroom?

  Yes, HJM offers specific towel radiators (like the NERIS series) and heaters rated IP24 for bathroom use. They must be installed in Zone 2 or Zone 3, avoiding Zone 0 (inside the bath/shower) and Zone 1, in accordance with electrical safety regulations.