Hot Water Heating and JUCA

First of all, we want to emphasize that all JUCA products are designed to be appliances that create WARM AIR to be distributed around the house. That is certainly their primary function.

However, since they work so very well at this task, customers sometimes realize that the JUCA is capable of creating and supplying even more heat than they are using. Sometimes they use this extra capability to send heat to a basement, a workshop or a garage that otherwise wouldn't be heated. But then sometimes people ask about getting some benefit from their JUCA in heating water.

There are three primary applications for which they are thinking.

  • Hydronic Hot Water House Heating. This use, of supplying enough hot water to entirely heat a home, is NOT realistic with a JUCA. There MAY be possibilities of a PARTIAL Hydronic system, if the JUCA is allowed to heat most of the house with its warm air, and the Hydronic heating is only needed in one or two distant rooms.
  • Heating water to supplement a Solar Heating System. This is often a realistic usage of heat that a JUCA could put into a water medium.
  • Domestic Hot Water. This is the most realistic usage of heat that a JUCA can put into water.

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Over the years, we have been aware of many different approaches that people (and competing products) have used to accomplish this goal.

JUCA has never and will never get involved in supplying any of the stuff for these sorts of experiments. We are just telling you our experience and passing along some of the experience of previous owners who have experimented in this area.

IF YOU EXPERIMENT WITH ANY OF THIS, YOU MUST INCLUDE A CIRCULATING PUMP AND PRESSURE-RELIEF VALVE IN THE WATER LOOP because you definitely DON'T want the water to boil and burst the pipe or otherwise explode!

All of these ideas depend on the small hydronic circulating pump to keep removing the heated water from the box or tubing in the firebox. In general, the idea is to just raise the temperature of the water a couple degrees each time it passes through the coil, gradually raising the temperature of the hot water tank's contents. After many passes through the coil, all of the water in the circuit (tank, pipes and coils) will be near the desired temperature.

Obviously, this brings up an important consideration. IF you have a power outage (and you will), the pump will stop circulating, and it becomes rather likely that the small amount of water in the coil will build up very high pressures. THIS is why the Temperature- Pressure Relief Valve must be in the circuit, and it should be relatively near the heating coil. Superheated steam would be ejected from the valve at that time. This subject is VERY IMPORTANT to consider because it WILL HAPPEN. And you DEFINITELY don't want anyone to get hurt or anything to get damaged as a result.

Don't try any of this unless a professional plumber gives guidance and / or does the installation.


The JUCA Home Page is at: juca