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THERMO SIPHONING AND SIMPLE BATCH HEATER

THERMO SIPHONING AND SIMPLE BATCH HEATER

This simple batch heater is popular in many southern states where freezing is not a problem. It is used to preheat well water for a domestic hot water system, however it is not very efficient because of night heat loss.
The nice thing about this “Bread Box” is that it’s inexpensive and easy to build. If you can find a small water tank like the one in the picture you might like to build this batch collector.

If you don’t have access to a small tank you can still make a very simple bread box out of cardboard, crinkled newspaper, aluminum foil, a piece of plastic and a jug of water.

1. First stuff the insides of a box (2’x2’x2) with crinkled, damp, newspaper. Make the sides about an inch thick. This should take you less than an hour, although you might have to wait a week for the newspaper to dry out. To speed the process up. Place the box with the wet newspaper in your attic. As a matter of fact you should install the wet newspaper into the box while your in the attic. I know it sounds messy, but if you’re on a budget this is a great way to make an insulated box.

2. After the wet newspaper dries out glue aluminum foil onto it. Now take a bowl and place it upside down in the center of the box. Place a one gallon jug of water, painted black, on top of the bowl.

3. Take a temperature reading of the jug of water before putting a glass or plastic lid on your Bread Box. Now place it in direct, bright sunlight for three hours and then measure the temperature of the jug of water.

4. To measure the amount of solar heat you collected in three hours multiply the temperature of the water by 8. One gallons has a weight of 8 pounds.

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