Just to update on EN378

There are guidelines on the maximum volume of refrigerant that could be discharged into a space without the need for a fixed refrigerant sensor, also known as “practical limits”.

These two examples have been taken from BS EN378 part 1 and have been widely used for air conditioning application for hotel bedrooms and small office spaces.

The values are 0.44kg/m³ for R410A, 0.33kg/m³ for R407c.

Above these values a sensor is required.