What is Low H2O?

What is Jaga Low H2O Hydronic Heating?


Low H2O radiators are much more efficient in comparison to traditional radiators. After detailed scientific research, the JAGA heat exchanger has been designed to work with condensing boilers, solar thermal and geothermal applications. The increased contact area between the copper and aluminum in the JAGA heat exchagner gives optimum heat emission, even with water temperatures of only 95°F (35°C), making them incredibly efficient.


The low water content of the Jaga heat exchanger and better thermostatic operation ensures perfect regulation and the greatest achievable heating comfort: the room temperature remains constant at the desired level.

A traditional 6800 BTU/hr (2000 watts) radiator weighs around 88 lbs (40 kg) and absorbs about 2000 BTU/hr (600 watts) of energy before it even begins to heat the room it's in. What this means, in simple terms, is that when the rad turns on, you have to wait up to 15 minutes to feel the heat. When it shuts down, it keeps heating the space for up to an additional 15 minutes, potentially overheating the space. This heat cannot be stopped by the thermostat.

This feels uncomfortable and is a waste of heat. Each minute your radiator continues emitting heat is a minute of energy loss. Traditional radiators continue heating unnecessarily for at least 20 minutes, wasting energy and making you uncomfortable.

Jaga Low H20 Heat Exchangers are designed to heat up and cool off in as little as 3 minutes, meaning you feel the heat immediately and you save energy by not heating the room when it is not needed. The Jaga low temperature heat exchanger also makes for a more comfortable home. A classic example is solar gain from windows. If your living room has a radiator in it and the sun is shining and heats the room up, traditional rads will continue to over-heat the room. Jaga rads will not! Jaga Low H20 Heat Exchangers are also designed to combat the classic problem of being too hot near the radiator and too cold in the far corner is a thing of the past. With Jaga's advanced heat dissipation the temperature distribution is perfect!


Jaga Low H2O radiators react very fast and can be easily controlled making them a perfect match for radiant in-floor systems. For ultimate heating comfort, radiant heating should be combined with Low H2O radiators. Furthermore, Low H2O radiators make your system much more energy efficient.

Use your radiant floor heating system to maintain your minimum temperature of 64°F (18°c). The Low H2O JAGA element will bring your room to a comfortable 68°F (20°C) when necessary, fast and with minimal energy consumption. This combination allows you to benefit from free energy, such as the sun, and can eliminate rooms overheating due to solar gain.


Over the last few decades, the technology used in the construction industry has changed dramatically. Our entire way of living has changed. Nowadays, it’s unacceptable to come home to a cold, damp house or to find drafts or other cold radiation sources within the house. This was certainly not the case in the past with uninsulated buildings and single glazing. Nowadays there are very strict standards and regulations concerning the level of insulation in modern buildings.

These new regulations bring certain problems with it, like build up of moisture and mould due to bad air circulation. With Low H2O radiators this problem is solved due to its larger air distribution, at a lower air temperature. This provides healthy and consistent warmth everywhere in the room. As a result of this better air circulation the entire room is at the same temperature. As a result, there is no risk of damp or mould formation.


Low H2O radiators give off a healthy and safe warmth. As a result, they meet the highest safety standards. Their surface temperature does not increase above 109°F (43°C). This means you can never be burnt by the casing making the Jaga solution the smart choice for all situations - especially those where small children or the elderly are located