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FAQ

How long has Jaga been supplying radiators in the UK?

Jaga was established in the UK in 1991.

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 an accurate heat loss calculation 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 radiators upstairs, where controllability and response time is more important, and where the heating is required for shorter periods. You may also want to make a design statement by choosing one of our award-winning decorative radiators.

What are the outputs in Jaga literature and the Jaga website based on?

We show the radiator outputs in accordance with the European Standard EN442. This is calculated in 3 factors, the flow & return temperature to and from the boiler added together then divide by 2, this will give you the 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 still are 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 directly to you.

Do my radiators need venting?

If your decorative 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.

Do Jaga radiators comply with EN 442?

All Jaga radiators are manufactured and tested to EN 442.

How do I convert BTUs into watts?

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

How long is your warranty?

Each decorative radiator or radiator casing carries a warranty of 10 years. The Knockonwood heat exchanger carries a 30 year warranty. The valves carry a 3 year warranty. Full warranty details can be found on this web site.

Can I have a different colour to what is shown on the jagahomeheating website?

We can offer most colours but there is a surcharge for this. Please telephone the Jaga sales office on 01531 631533 for a quotation. Only the colours shown on the web site are available for direct order via the web site.

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, making them the perfect choice for childrens rooms. Decorative radiators such as the Iguana, however, do get hot if the water in the central heating system is hot.

Can I use Jaga radiators 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 & bypass the radiator.

My Knockonwood 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.

Are the rawlplugs and screws supplied with the radiator?

Fixing packs are supplied with the 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.

Can I remove and refit my radiators as I am redecorating?

Unlike most traditional radiators, the Jaga Knockonwood, Play and Strada casings 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 so that the convection is distributed equally.

I see on your photos in sales literature it shows a TRV (thermostatic radiator valve) fitted to the radiator. Do I have to use a TRV head?

We recommend that a TRV head is used to ensure maximum energy efficiency. However, if you have other thermostatic controls you can purchase manual valves. Please check with the Jaga customer services department on 01531 631533.

Is there enough space to drop 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 is 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 a special Iguana with top end connections but we recommend that you speak to the Jaga Technical Department first on 0845 2507251 (UK callers 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 width choices as these are limited, and are available to special order at a premium price.

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

We can offer the appropriate 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/size of pipe. There are many types of pipe with different wall thicknesses, this is important to have the correct adaptor. 10mm pipe is not normally recommended as the flow through the pipe is restricted and therefore the output may be lower than that stated. The performance of the Iguana is designed to have 15mm pipe work supply.

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

This is possible but we would always recommend using the Jaga Iguana valves. The thread on the Iguana valve connections are 1/2" BSP.

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, which 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 any more.

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 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 Knockonwood radiator?

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

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".

Are your thermostatic Jaga valves bi-directional?

The Iguana valve is bi-directional. All other valves are directional in that they have to have the flow plumbed into them.

Other questions?

If you have a question that is not covered on this page, please email homeheating@jaga.co.uk or the Technical Support department on 0845 250 7251.