What are Watts & BTUs? What is a Delta (Δ) Rating?
Guarantee: 8 years
Wall Bracket Kit, Air Vent and Masonry Fixings
Colour: Black
Finish: Matt
Heat Source: Central Heated/Hot Water
Terma aims to think differently when conceiving its radiator designs and the Hex is in its own class, made from hexagonal shapes across a multi layered design with breaks in the formation of the each hex for extra design distinction. Hex is a true statement piece to finish off your room. Place Hex against a feature wall of exposed brick or alongside some hexagonal wall tiles or a piece of art which echoes the form of the radiator - be creative. Hex doesn't simply sit on the wall - but looks like it has grown out of your wall. The little peg type parts which jut out are perfect for hanging your kitchen / bathroom towels to dry if you wish. The Soft Black RAL 9005 colour has a matt. smooth finish. Hex features 50mm pipe connections so we suggest matching this with a 50mm integrated valve - Terma stock a valve and pipe masking set in a matching colour to this black radiator for a matching finish.
Delta (Δ) Ratings Explained
What is a Delta (Δ) Rating?
When discussing heat outputs, the Delta rating is the difference between the temperature of the water inside the heating system and the desired temperature of the room.
What does the value represent?
In simple terms, this value is about heat loss. Heating a room only works, if the radiator output exceeds the heat loss of the room.
We use this calculation to make it easy to choose a radiator that will have a heat output that exceeds the heat loss of the room when connected to your heating system type.
If you don't know the room heat loss, you can use our calculator to find out.
What Delta Rating should I use?
Δ70 = Gas boilers before 2005 / Oil boilers before 2007.
Δ50 = Gas boilers after 2005 / Oil boilers after 2007.
Watts are our main unit of energy/power in the UK, commonly associated with lightbulbs and Home Energy performance certificates (EPCs).
What is a BTU?
BTUs are the unit of measurement used to portray a radiators heat output and a rooms heating requirement. 1 Watt is equal to 3.41 BTUs.
Why are they important?
We buy radiators to heat our homes, right? So, we need a way of knowing if a radiator is powerful enough to heat the room that we are shopping for - Watts and BTUs provide us with a value that makes its easier to compare radiators and ultimately choose the right one for our heating requirement.
Need help figuring out how much heat your room needs?
Our fast and easy-to-use BTU calculator can help you:
Work out a heating requirement value (in BTUs & Watts) for your room
Show you in-stock radiator recommendations that can fulfil this heat requirement
Terma aims to think differently when conceiving its radiator designs and the Hex is in its own class, made from hexagonal shapes across a multi layered design with breaks in the formation of the each hex for extra design distinction. Hex is a true statement piece to finish off your room. Place Hex against a feature wall of exposed brick or alongside some hexagonal wall tiles or a piece of art which echoes the form of the radiator - be creative. Hex doesn't simply sit on the wall - but looks like it has grown out of your wall. The little peg type parts which jut out are perfect for hanging your kitchen / bathroom towels to dry if you wish. The Soft Black RAL 9005 colour has a matt. smooth finish. Hex features 50mm pipe connections so we suggest matching this with a 50mm integrated valve - Terma stock a valve and pipe masking set in a matching colour to this black radiator for a matching finish.