TS 12850

TS 12850 addresses the rules for authorised services that support ventilation and air conditioning systems. It brings together the service organisation, technical equipment, structural setup, and staff qualifications expected for services handling air handling units, air conditioners, cooling groups, fan-coils, fans, air-cleaning devices, air curtains and similar equipment. In practical terms, it focuses on the service capability behind HVAC maintenance and repair, rather than on the appliances themselves.

What the standard is about in technical terms

In general technical context, an authorised service is more than a workshop: it is an organised service operation with suitable premises, tools, measurement equipment, and trained personnel. For HVAC equipment, these elements matter because performance depends on airflow, temperature control, humidity control, filtration and reliable mechanical operation. Well-organised service conditions help ensure that maintenance, fault finding and repair can be carried out in a controlled and professional way.

What is included and what is not

• It covers authorised services for ventilation and air conditioning systems.
• It refers to services for air conditioning plants, air conditioners, cooling groups, fan-coils, fans, air-cleaning devices and air curtains.
• It excludes domestic aspirators and ventilators.
• It also excludes air conditioners used in cars.

The standard is therefore best understood as an organisational and competence rule for the service side of HVAC equipment. It does not describe the operating principles of the appliances in detail; instead, it defines the framework within which those services are expected to operate. As a withdrawn national standard, it reflects the service requirements used in its period of application.