What is LowH20?
The first energy efficient radiators available in the UK, Low-H2O stands for low mass and low water content. Low-H2O radiators contain only 10% of the water content and 5% of the thermal mass of a steel panel radiator with equivalent output. With this much lower thermal inert, Jaga Low-H2O radiators can react quicker to external factors allowing you to benefit from free heat sources such as sunshine, cooking, ironing etc. without wasting energy. Low-H2O also stands for low water temperatures: these radiators are actually designed to operate on a supply water temperature starting from 43°C or as low as 35°C for Jaga products featuring DBE technology.
Are all Jaga Low-H2O radiators safe?
Unlike panel radiators, Low-H2O heating is based on convection. This means that the casing doesn’t need to get hot to start emitting heat. Jaga Low-H2O casings are safe to touch at all times, even at high flow temperatures. Within the Jaga LST range, there are even products with soft rounded corners and completely concealed pipe connections – for example the Maxi or Play. That’s why Jaga heating solutions are the first and safest choice for many nurseries, schools, homes for elderly people, health authorities, government departments, leisure centres and public buildings.
How responsive are Jaga Low-H2O heat emitters?
Since they only have to heat up 5% – 10% of the mass of a traditional panel radiator, the reaction time is much faster. The Low-H2O heat exchanger transfers the heat immediately into the room and its low mass means that it stops heating much faster when no longer required. Each second that the radiator is emitting heat after the system is switched off is a waste of energy. A traditional panel radiator or underfloor heating system continues emitting heat for a long time due to its high mass and high water content, whereas Low-H2O responds immediately. An independent test by the BRE (Building Research Establishment, Watford) has confirmed this.
Why is a Low-H2O heat exchanger more efficient with lower water temperatures than any other fin tube element?
Jaga Low-H2O elements are designed to work with low water temperatures. The corrugated fins are developed with a maximum aluminium surface and large contact area with the copper tube. The fin distance is optimised to generate the best airflow through the element when using low water temperatures. The element is based on the principle of a cross flow heat exchanger, whereby the temperature difference between the water and air is always optimal. The short contact distance between the fin and the air reduces the outlet air temperature, this maintains a laminar airflow in the element and means that the warm air does not go immediately to the ceiling but mixes with the ambient room air, just where you want it to become warmer.
Can I use Jaga Low-H2O convectors on a 1-pipe system?
We don’t recommend use on a 1-pipe system as the pressure drop through the radiator is higher than the pressure drop through the pipework, therefore the hot water will take the path of least resistance and bypass the radiator.
My radiator is not hot to touch but the pipes to and from the valve are hot; is this correct?
Yes this is correct. The Jaga design is to have 97% of the output by convection through the top of the radiator which means that the front will only get warm to the touch.
Do I have to use an inhibitor when using Jaga heat exchangers?
No the heat exchanger is made of brass and copper. However you do need to check which inhibitor is needed for the boiler or heat pump and the pipework on the system.
I have a Jaga convector radiator at the moment and would like to change the casing. Is this possible?
If you want to change the casing for a newer or different finish casing of the same size and style then this is not a problem. The casing can easily be changed without draining the heating system.
Are the raw plugs and screws supplied with the radiator?
Fixing packs are supplied with the Low H₂O radiators suitable for use where there is a solid wall construction. However, if the wall construction is not suitable for the fixing supplied, it is the installer’s responsibility to provide the correct fitting.
Your pictures shows the valve on the right hand side. Can I have the valve on the left hand side?
This is possible by turning the Heat Exchanger 180˚ .The pipe dimensions are now from the left side of the radiator.
Can I remove and refit my radiators as I am redecorating?
Unlike most traditional radiators, the Jaga casing can be removed without any draining down at all. We recommend the heat exchanger is covered so that paint, plaster etc doesn’t block the fins.
What clearances do I need above and below my Low-H2O radiator to ensure maximum efficiency?
We recommend clearances of 100mm above and below on a radiator with a type 06, 10 &11 heat exchanger, 120mm above & below on a type15 & 16, 150mm above & below on a type 20 & 21, so that the convection is distributed equally.