Δt

Refers to the difference in temperature between the water circulating in the central heating system and that of the ambient temperature. It is important to use the correct Δt when selecting your radiators, as the same radiator will have different outputs at different water temperatures.

Δt50

Δt50 is the UK standard, however Stelrad also quote at lower levels for lower water temperature systems.

BSP

British Standard Piping.

Btu/hr

British Thermal Unit per hour is the standard measurement used to state the amount of output of any heat generating device.

CETIAT tested

A leading independent French laboratory which conducts testing and assessments.

CPD

Continuing Professional Development.

EN 442

Is the European standard to certify the output of heat emitters, it provides consistent testing for stated heat outputs and is strongly regulated. All Stelrad radiators conform to EN442.

Heat loss

Is the amount of heat a room loses, it is therefore an important calculation when determining what size radiator is required to heat a room to the correct level.

ISO9000

Is a set of International regulations related to quality management systems.

K1

Also known as Type 11, is a type of radiator with 1 radiator panel and 1 set of convection fins.

K2

Also known as Type 22, is a type of radiator with 2 radiator panels and 2 sets of convection fins.

K3

Also known as Type 33, is a type of radiator with 3 radiator panels and 3 sets of convection fins.

KIWA

Kiwa Ltd is an energy consultancy, Notified Body, UKAS-accredited testing lab and training centre with expertise in gas, oil, solid fuel, biomass and other renewables, construction materials, water and electricity.

P+

Also known as Type 21, is a type of radiator with 2 radiator panels and 1 set of convection fins.

P1

Also known as Type 10, is a type of radiator with 1 radiator panel and no convection fins.

RAL

A European wide colour matching system.

STARS

The Stelrad Technical Advanced Radiator System heatloss calculator, offers an even simpler way to get sizing of radiators right, first time.

TBOE / BOE

Refers to which position the pipes are connected to the radiator, OE means opposite end i.e. 1 pipe on each side, TB is top bottom i.e. 1 pipe is connected to the top and 1 to the bottom, B is both pipes connected to the bottom.

UIN

Is the Stelrad product identification code.

Warranty

The warranty covers any defect that is attributable to a manufacturing, assembly or material fault, further details available on request.

Watts

Is another measurement for heat output, 1 watt is equivalent to 3.412 Btu/hr.

Business Information Modelling (components). Download BIM components from the BIM page. 

Pre approved quality company for health and safety, quality and sustainability.

OHSAS 18001 Accreditation Standard for Occupational Health and Safety management.