We've displayed the most appropriate heat output below to adequately heat your room:
Watts:
BTUs:
What are Watts & BTUs?
The heat outputs have been measured at Delta Δ50*.
What is a Delta (Δ) Rating?
*The Delta rating for your chosen heating system as recommended by Building Regulations
Main Features:
BTUS
Δ30: 744 / Δ40: 1036 / Δ50: 1385
WATTS
Δ30: 218 / Δ40: 309 / Δ50: 406
What are Watts & BTUs? What is a Delta (Δ) Rating?
Guarantee: 8 Years
Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
Colour: Black
Finish: Matt
Heat Source: Central Heated/Hot Water
Zig Zag is an original Terma product design with horizontal bars set at an angle so you place your towel over the top bar. Zig Zag has chunky square profile bars perfect for matching with linear square profile bathroom accessories. The brackets are located on the uprights leaving the main design area and obstruction free. Zig Zag is best used as a focal point in the bathroom to add a designer feel. Zig Zag can also be fitted as dual fuel - whereby it can run on the central heating in the winter and as electric in the summer. You simply need a Terma heating element and the Terma Integrated Valve with Immersion Tube (no T piece required with this valve) to easily install as dual fuel (835h = 300w, 1070h = 400w element) The Heban Black colour from Terma has a matt, rough textured finish. Terma offers a 150x50mm colour chip of this finish should you wish to see the colour prior to purchase. If your pipework comes through the wall Terma suggest fitting 3 Axis Corner Valves for a neat finish where the valves do not protrude forward of thr towel rail and they run in line parallel with the bars at the bottom.
*These electric heating elements must be installed by a registered competent electrician. Any faults developed due to incorrect installation will not be covered under the product warranty. The suggested fuse size is calculated based on a 230V supply and whilst 230V is the nominal voltage given to homes in the UK, the actual voltage supply can vary. The registered competent electrician carrying out the installation will determine the appropriate size of fuse to use for the installation.
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?
Δ50 = Gas boilers before 2005 / Oil boilers before 2007.
Δ40 = 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
Zig Zag is an original Terma product design with horizontal bars set at an angle so you place your towel over the top bar. Zig Zag has chunky square profile bars perfect for matching with linear square profile bathroom accessories. The brackets are located on the uprights leaving the main design area and obstruction free. Zig Zag is best used as a focal point in the bathroom to add a designer feel. Zig Zag can also be fitted as dual fuel - whereby it can run on the central heating in the winter and as electric in the summer. You simply need a Terma heating element and the Terma Integrated Valve with Immersion Tube (no T piece required with this valve) to easily install as dual fuel (835h = 300w, 1070h = 400w element) The Heban Black colour from Terma has a matt, rough textured finish. Terma offers a 150x50mm colour chip of this finish should you wish to see the colour prior to purchase. If your pipework comes through the wall Terma suggest fitting 3 Axis Corner Valves for a neat finish where the valves do not protrude forward of thr towel rail and they run in line parallel with the bars at the bottom.
*These electric heating elements must be installed by a registered competent electrician. Any faults developed due to incorrect installation will not be covered under the product warranty. The suggested fuse size is calculated based on a 230V supply and whilst 230V is the nominal voltage given to homes in the UK, the actual voltage supply can vary. The registered competent electrician carrying out the installation will determine the appropriate size of fuse to use for the installation.