01531 631 533


How long has Jaga been supplying radiators in the UK?

Jaga was established in the UK in 1991 to sell safe-to-touch radiators to the architectural and building trade for use in public and office buildings.

Where can I view Jaga products?

At Jaga's UK headquarters in Ledbury, there is a permanent display of many of the most popular Jaga products. Please contact Jaga on 01531 631533 for details of other showrooms through the UK and Ireland.

What information do I need to give Jaga to enable you to make a recommendation of heating solution?

We would require the following: Heat loss requirements, design temperatures (flow/return/room), any restrictions of height or length, model / type of radiator and if pipe work is coming from floor or wall (to enable us to select correct valves)

How many Jaga units are needed per room?

This calculation is based upon a number of variables. These include factors such as; the total volume of the room in cubic meters, which floor the room is on (basement, ground floor, middle floor or top floor), the length of the exterior walls, the construction of the walls (solid, cavity, insulated), whether the windows are single or double glazed and the total area of all windows and glazed doors. Also the model, dimensions and type of Jaga product chosen determine the likely output. For more information please contact the Jaga Technical Department on 0845 2507251 (UK callers only).

Can Jaga products be used alongside underfloor heating systems?

Jaga products can be used as either a primary or secondary heating source. For example, you may wish to install underfloor heating on the ground floor of a house, but use Jaga's Low-H2O or DBE radiators upstairs where controllability and response time is more important, and where the heating is required for shorter periods. Often, Jaga products are chosen for small rooms where the floor area is insufficient for underfloor heating to deliver enough heating output, or in front of large areas of glazing to combat down draughts and eliminate condensation.

What is the difference between a direct and an indirect system?

A direct system is where the domestic hot water (hot tap water) is connected to a radiator, whereas an indirect system is totally central heating. We do not recommend any of our products to be fitted on a direct system.

What are the outputs in Jaga literature and the Jaga web site based on?

We show the radiator outputs in accordance with European Standards EN442. This is calculated in 3 stages, the flow & return temperature to and from the boiler added together then divide by 2, this will give you mean water temperature (MWT). You now take the desired room temperature from the MWT. This is now the Delta T (∆T) i.e. 75 flow + 65 return = 140 ÷ 2 = 70(MWT) - desired room temperature of 20 = ∆T50. If your temperatures are different, please look at the technical data correction factor chart in the appropriate Jaga literature for your radiator type. The correction factor chart will show many different options. If you are still unsure, please call the Jaga Technical Department on 0845 2507251 (UK callers only).

What is the hydraulic pressure drop across a radiator?

The pressure drop across a radiator is dependent on the style, size & type of radiator as well as the flow & return temperature. This will need to be calculated by the Jaga Technical department so please email all the details to jaga@jaga.co.uk so we can work it out and then get back to you directly.

Do my radiators need venting?

If your radiators are cold at the top and hot at the bottom, the radiator needs venting. Simply turn off the heating system and slightly open the air vent (some radiators will require a radiator vent key, others may need a small screwdriver) until water is noted at the air vent. Take care to protect decorated surfaces with a cloth prior to opening the air vent. Gently close the vent and switch the system back on. If the radiators need venting frequently, there may be a fault with the system and a heating engineer should be called.

What is the standard colour for your radiators?

This varies between products, however most of the Jaga collection standard colour is RAL 9016 Traffic White

What is the paint finish?

The paint is epoxy-polyester powder, sprayed electrostatically & baked at 200˚C & is UV resistant.

Do Jaga radiators comply to EN 442?

All Jaga radiators are manufactured and tested to EN 442.

How do I convert BTU's into watts?

Divide the BTU's (British Thermal Units) by 3.414. (for example 5870 BTU's ÷ 3.414 = 1919 watts). Or to convert watts to BTU's multiply by 3.414 (for example 1259 watts x 3.414 = 4298 BTU's).

How long is your warranty?

Each radiator casing carries a warranty of 10 years. The heat exchanger carries a 30 year warranty. The valves carry a 3 year warranty both are in respect of defective materials and manufacture.

How do I calculate the water content of the radiators?

We can supply you with the information on request, the Jaga convectors can be as much as 7 times less than a standard steel panel radiator which means desired room temperatures can be reached far faster.

Can the heat exchanger run cooling from a DX (split unit) system?

The Jaga heat exchanger is not suitable for refrigerants.

Can I have a different colour to what is shown in the Jaga catalogue?

We can offer most colours as a special but there is a surcharge for this. Please telephone the Jaga sales office on 01531 631533 for a quote.

Does Jaga have a Twitter Profile?

Yes! You can follow us at www.twitter.com/jagauk

What is Low-H2O?

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 Guardian 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. If you want to change the style or size of the casing please contact Jaga technical department.

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.

I see on all of your photos in sales literature it shows a TRV fitted to the radiator. Do I have to use a TRV head?

You don't have to use a TRV head, we can supply you with two Lockshields. Please check with Jaga sales department on 01533631533 to see if you have to order an extra cover plate set which you will need on certain products.

Can you please let me know the water contents of your type 10 & type 15 heat exchanger?

The water content is 0.65 litres per metre for the type 10 heat exchanger, and 0.98 litres per metre for the type 15. If you require a list for all of the Jaga heat exchangers please contact Jaga technical department on 0845 2507251 (UK callers only).

Does my Low-H2O radiator need venting?

If your Low-H2O radiator is cold, the radiator needs venting. Simply turn off the heating system and slightly open the air vent until water is noted at the air vent. It is important to ensure that there is sufficient water in the system. Take care to protect decorated surfaces with a cloth prior to opening the air vent. Gently close the vent and switch the system back on. If the radiators need venting frequently, there may be a fault with the system and a heating engineer should be called. - For more detail on how to vent your Low-H2O radiator click here

How do I remove my Strada casing?

The removal of the Strada casing can be carried out as follows:

  • Remove the back bar
  • Remove the grille
  • Remove the TRV Head (you may need to remove a black split collar first depending on TRV head)
  • Lift the casing 10mm, slide the casing towards the Valve 20mm or more
  • Lift & tilt the top front of the casing away from the wall and remove

When do I need to use a LST (Low Surface Temperature) radiator?

LST radiators are recommended for areas where a person may injure themselves if left in contact with a traditional radiator. Generally we offer LST style radiators for use in hospitals, schools, nurseries and homes for the elderly and other high risk areas where there may be either accidental or prolonged contact with the radiator casing.

Can I have a Jaga LST radiator in a different colour?

Guardian is only available in Jaga colour 233 (RAL9016) & Tempo is only available in Jaga colour 101 (RAL 9010). Other Jaga LST's are available in different colours. There is a surcharge for other colours.

My Jaga LST radiator is banging when it first comes on so I want to try and bleed it. However I cannot find a bleed screw?

To bleed the LST you will need a flat-headed screw driver. The air vent is situated 75mm in from the side panel on the side that the valve is positioned. The air vent is at high level so that you can put the screw driver through the grille to bleed the air out.

Can I use the Jaga Iguana 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.

Is there enough space to drop a 15mm pipe down the back of the Iguana so that I can connect at the bottom connections?

Yes there is room to do this on the Arco, Circo, and Corner models however if you have the Aplano this not possible as the cross bar is close to the wall.

Can I turn the Iguana 180˚ and connect at the top?

No, this is not possible as the central heating water will short cut across the top of the Iguana and make its way direct to the return pipe. It is possible to order an Iguana with top end connections but we recommend that you speak to Jaga Technical Department first on 0845 2507251 (UK callers only).

Can I put a Thermostatic radiator valve head (TRV Head) on the top connection of the Iguana

No as the TRV Head will receive heat from the top of the radiator as soon as the heating starts and signal that the room is up to the temperature. Therefore the TRV Head will shut the flow off.

Does my Iguana radiator need venting?

If your Iguana radiator is cold at the top and hot at the bottom, the radiator needs venting. Simply turn off the heating system and slightly open the air vent until water is noted at the air vent. It is important to ensure that there is sufficient water in the system. Take care to protect decorated surfaces with a cloth prior to opening the air vent. Gently close the vent and switch the system back on. If the radiators need venting frequently, there may be a fault with the system and a heating engineer should be called. - For more detail on how to vent your Iguana radiator click here

Can I turn the Iguana on its side?

No, this is not possible. It is designed as a vertical style radiator only.

Can I have an Iguana at a different height & width?

Yes. This is possible ,we can offer a height from 1000mm to 2400mm and different widths, please check with the Jaga office for the width choices as these are limited.

I've just bought your Aplano radiators with your decorative valves & my plumber wishes to use 10mm copper or plastic pipe? If this possible?

We can offer the adaptors, however you can see if your heating engineer can use a 15mm copper tail into the couplings provided. If you wish for these to be ordered for plastic; we will need to know the manufacture, type and size of pipe. There are many types of pipe with different wall thicknesses, this is important to have the correct adaptor. A 10mm pipe is not recommended as the flow through the pipe is restricted, therefore the output may be lower that stated. The performance of the iguana is designed to have a 15mm pipework supply.

Can I use other manufacturer's valves on the Jaga Iguana range of radiators?

This is possible. The thread on the Iguana valve connections are 1/2" BSP.

What size electric element can I fit into my towel rail?

If your towel rail is on a mixed application (plumbed into the central heating also with an electric element fitted) you can use the element size of the output shown when the towel is connected to the central heating, however you must choose the electric element one size down i.e. If the towel rail output stated on a central heating system is 540watts you would choose the 500watt electric element.

If your towel rail is 100% electric (not plumbed into the central heating) you have to use an element size 30% smaller than the output shown when the towel rail is connected to the central heating. For example, if the towel rail output stated on a central heating system is 540watts, you subtract 30% making 374watts. Now you would choose the 300watt electric element, as you still have to choose the next size down.

Does my Geo Horizontal radiator need venting?

If your Geo Horizontal radiator has cold spots on the surface of the decorative stone, the radiator needs venting. Simply turn off the heating system and slightly open the air vent until water is noted at the air vent. It is important to ensure that there is sufficient water in the system. Take care to protect decorated surfaces with a cloth prior to opening the air vent. Gently close the vent and switch the system back on. If the radiators need venting frequently, there may be a fault with the system and a heating engineer should be called. - For more detail on how to vent your Geo Horizontal radiator click here

My Geo Horizontal is not getting hot on the top. How do I vent the air from it?

There are two air vents on the Geo Horizontal, one is an extended tube type air vent on the heat exchanger, this is located under the grille on the right-hand side of the Geo. The second air vent is located at the back on the left hand side of the Geo; 100mm in & 60mm down, a 10mm spanner is needed. Be careful not to undo it too far; as soon as you hear the air coming out do not open it anymore.

Does it matter if I plumb the Geo Vertical upside down?

The Geo Vertical can be plumbed in upside down. However, if you are using a TRV Head do not feed your pipework from the top.

Do Jaga products work with ground or air source heat pumps?

Yes. Jaga's DBE technology is designed to deliver high heating output even at very low water temperatures, such as those inherent in systems powered by ground, air or water source heat pumps. This means that even with a nicely designed, relatively small casing, you can make the most of the latest energy saving technologies without sacrificing response and controllability.

What is DBE?

Jaga's patented Dynamic Boost Effect (DBE) works in harmony with the Low-H2O heat exchanger to deliver maximum output from much smaller radiators even at very low flow temperatures. The microprocessor controlled unit intelligently controls the speed of the incredibly quiet thermal activators to ensure that the correct level of heating is delivered at all times to achieve and maintain a comfortable temperature. DBE equipped Jaga radiators warm a room up 9 times faster than a steel panel radiator with a comparable output. Jaga products containing DBE technology are profiled in the Top Performers section of this site.

I assume that the DBE should be powered on at all times - is that correct?

For the DBE to work, the fans need power, so yes. However, turning off the power to the fans will not stop the unit from providing heat via natural convection.

What is the running cost of the DBE fans?

The running cost is extremely low. The tests that we have carried out show that if the fans were to run constantly it will cost less than 1p a day.
The Amperage for the different size DBE units are: type 6 is 0.011 amps, type 10 is 0.012 amps & type 15 is 0.009 amps. The power supply draws 0.08 amps from the mains 230V supply.

What is the sound level of the fans?

Calculated Dba running in comfort mode: type 6 & type 15 is 27Dba, type 10 29Dba.

Can the controls be linked together when using multiple radiators?

Yes this is possible. You can run up to six DBA fan units off one power supply. If you wish to have more than six running, please check with Jaga Technical office on 0845 2507251 (UK callers only).

The radiator is equipped with a thermostatic valve - should this be left at maximum at all times, or can it be used to regulate room temperature?

The TRV controls the flow of water into the radiator, much like any other type of radiator such as steel panel. The DBE controller only operates the fans, whether the options are on/off, comfort (depending on the entering water temperature) and Boost mode (again, depending on entering water temperature). The DBE switch on top of the unit has no control over the temperature - it only operates the fans on/off/boost. This works similarly for the central heating timer.

If the valve is set below the comfort temperature, will the fans blow continuously? Should they?

The valve has nothing to do with comfort or boost mode. It only detects the surrounding air temperature and allows hot water to enter if demand for more heat output if required. If you turn it down, for example if you are too hot, then the water temperature entering will drop and the sensor on the element will detect this and stop the fans running, stopping it from causing draughts. Again, this works similarly for the central heating timer.

Can the DBE fans be retrofitted?

Yes, the fans can be fitted at any time. The minimum length of a convector in which a fan can be installed is 600mm.

Can the DBE unit provide cooling?

Jaga offer two types of DBE. The standard DBE is not suitable for cooling just heating. However we can offer a DBE Pro system that can be used for cooling. We recommend that you also evaluate whether our oXygen technology might meet your requirements.

What power supply is needed for DBE units?

You will need a standard UK 3pin 230v-240v plug socket. The power supply (transformer to 12volt) is similar to that of a mobile phone charger in appearance. In most cases the plug socket can be positioned out of sight above the heat exchange within the radiator casing.

Can I use DBE in a bathroom or wet environment?

The 12v DBE is designed so that it can be in a wet area. Please check the regulation for the 240v supply.

Why aren't the DBE fans working in my wall-mounted radiator?

If you have a wall-mounted radiator and the DBE unit fans have stopped working, there are a series of simple checks you can carry out to fix the problem. Download your fault-finding guide. If the problem persists, there may be a fault with the system and a heating engineer should be called.

The lights keep flashing on my DBE panel control, why is this happening?

Lights flashing indicates that the water temperature in the heat exchanger has not reached the required temperature. If the water temperature is correct and the lights are still flashing, you may need to check that the pipe clips on the printed circuit board are securely fixed to the end curves of the heat exchanger.

I can't see how to switch the comfort light on without also switching the boost light on.

If power to the fans is on then the standby light will be on. Once there is demand for heat in the room, be it via an individual TRV or room stat, the water will enter the heating element and the sensor will detect this and run the fans in comfort mode - the blue light will then come on.

If you then press the boost button while in comfort mode, all three lights will turn blue and the fans will run in boost mode before dropping down to comfort mode or standby if the demand for heat in the room ceases.

The PCB sensor will be clipped on the edge of the element (as seen below in 2A). The air temperature sensor needs to be hanging just below the heating element (as shown below). The setting on the PCV should remain as supplied at number 6 unless you are using a system with very low flow return and reutn temperatures (26 degrees or below).

What is maximum possible length of finned tube in 'series' on a Trench heater before expansion joints are required?

Jaga produce heat exchangers up to 4.735 metres long, anything longer than this length, we recommend that you plumb in individually. If you wish to link two shorter lengths together we can offer this as a special. We only advise two heat exchangers to be linked together at any one time. Please contact Jaga Technical department on 0845 2507251 (UK callers only) for a calculated output as there will be flow restriction in place.

Where are trench products made?

The Jaga trench units are manufactured at the Jaga factory in Diepenbeek, Belgium.

How is curved trench made?

The Jaga curved Mini Canal trench is manufactured with straight wells & heat exchanges that will be installed underneath the curved grille & frame. The rigid aluminium curved grille & frame are fed through a series of rollers that are set to the correct radius. We cannot offer curved grille in stainless steel however with all other Jaga grilles it is possible to have curved grilles and the minimum radius is 1200mm.

Can you please let me know what grilles are available?

We can offer three types of wooden grilles; Oak, Beech & Merbau in natural or varnished. The frame & spacers are dark brown however we can offer natural aluminium frame & spacers which we call the Designo style grille - the slats are closer together. We can also offer rigid aluminium grille in natural, brass, black or dark brown. These grilles can also come as a Designo grille which in this case the slats are closer together. We also offer the Pebbles and Accordion styles which help to make a design statement in any building.

Does the type of grille have an impact on the output?

Yes, the output will be effected by the type of grille you choose. This is due to free airflow through the space between the slats.

Can we run other services in the trench ie wiring and hot water pipes?

This is possible. If you require cut-outs in the brackets for services to run through please contact the Jaga Technical Department on 0845 2507251 (UK callers only) for information. The services will not get affected by the heat of the trench heat exchanger as the side of the trench is the coolest part of the well.

Can fan units be incorporated in the trench to gain greater output?

We can offer Mini Dynamic Canal trench heating that has 12volt fans fitted. The minimum trench width for fans to be fitted is 260mm.

What controls do I have to use with the Clima Canal trench system?

There are different ways to control Clima Canal units. Please contact Jaga Technical Department for information and advice on 0845 2507251 (UK callers only).

Can fan assisted Trench heaters be mounted in the ceiling?

No. The only product in the Jaga range that can be installed in a ceiling is the Jaga Brise unit.

I wish to purchase the grille & frame only from your Trench heating product range. Is this possible and can you please let me know what the depth of the frame is?

Yes, you can purchase the grille & frame only. The depth of the frame is 31mm and the minimum width we can offer is 100mm.


Do I have to use PTFE on the nuts & olives on the Jaga valve?

No. It is recommended that you only use PTFE on the union that attaches the valve to radiator.

Can you please let me know which way the olives are fitted?

The olives are fitted so the neoprene enters the valve, the brass split olive is then pushed in by the nut against the pipe, causing a seal.

Can I put a (TRV Head) Thermostatic radiator valve head on the top connection?

No. The TRV Head will receive heat from the top of the radiator as soon as the heating starts & signal that the room is up the temperature, therefore the TRV Head will shut the flow off.

I have noticed that the standard plumbers Allen key is slightly too big for the Jaga valve tails. How can I tighten the tails up?

If you have a plumbers Allan key you can file 1mm off one corner of the square air vent part and use this. Alternatively you could purchase an 11mm Allan key.

Can I use standard olives on the Jaga valves?

No. The Jaga nut & olive is to be used at all times. The shape of a standard olive is not compatible with Jaga fittings.

Can you please let me know what distance to leave for the TRV head that is on the side of the radiator?

The TRV Head will protrude no more than 100mm when the setting of the head is on maximum.

Can you supply me with different size nuts & olives for plastic pipe?

We can supply you with these but we will need to know the size & type i.e. the width 15mm and the thickness of the pipe wall 1.5mm for example.

Do I have to use the Jaga Pro-valve with your Low-H20 radiators?

It is possible to use other valves but we recommend using the Pro-valve. This valve is designed to be totally encased with the heat exchanger and only the TRV Head will show from the side of the casing.

What size of connections do the Jaga radiators have?

There are 1/2" BSP connections, the extended air vent is a G1/8".

What are the pipe dimensions of the radiator valves?

This varies between products and style of valves you choose. Another factor is also whether you are bringing your pipe work from the floor or from the wall.

Are your thermostatic Jaga valves bi-directional?

The only bi-directional valve that we offer is the twin style valve from the designer range. All other valves are directional in that they have to have the flow plumbed into them.

Can I use the Pro valve on all of your convector radiators?

There are 3 styles of convectors that we offer which do not use the Pro-valve. The Mini - 80mm high, type 9,14 &19 - and the Guardian FT LST & Bespoke Maxi LST.

Will the Jaga old style twin entry radiator valves fit new radiators?

The old Jaga twin entry valve (pre 1997) is not suitable for most of the current Jaga convector radiators. If you are fitting new radiators, it is advisable to renew the radiator valves as well.

Please complete the form below to ask us about any of our products or their applications and one of our consultants will be in touch with you.

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