ČSN EN 17625
Střešní jednotky - Zkoušení a hodnocení za standardních jmenovitých podmínek a podmínek částečného zatížení pro výpočet sezónního výkonu

ČSN EN 17625

This document specifies the terms and definitions, the test conditions and the test methods for the rating and performance of rooftop units. It also specifies the determination of capacities and the calculation methods considering rooftop units features, such as free cooling and air flow mixtures, for the determination of seasonal energy efficiencies in cooling and heating.
This document covers only space heating and/or cooling for comfort applications (process applications are outside the scope of this document). It applies to air-to-air and water(brine)-to-air rooftop units with electrically driven compressor(s), which may be equipped with a supplementary heater using electrical resistance or combustion of fossil fuel. This document does not cover rooftop units with remote condensers.
This document covers the features of free cooling, mixing air flows (on both sides) and internal heat recovery, as illustrated in Annex A. Annex B provides additional definitions and methods for determining seasonal performances for space cooling/heating with a minimum mixture of outdoor air and recycled air.