180 Liter Passive Duda Solar Water Heater Attached Pressurized Tank Evacuated Tubes Hot
- Hailstone Resistance: up to φmm (1″), Max Operating Pressure: 100psi, TK-7Y Controller
- Pressurize tank for domestic water supply, 14mm TU1 Copper Heat Pipes, Winter Resistant
- φ58mm x 1800mm Three-Target Cu/SS-ALN(H)/SS-ALN(L)/ALN Vacuum Tubes, High Boron Silicon 3.3 Glass
- Sun Absorption Efficiency: 93-96%, Vacuum Rating: Less than 5.0 x 10-3Pa, Lifespan:70% @ 15 Years
- Tank Diameter: 460mm (18.1″), Inner Tank Material: SUS304-2B Food Grade stainless steel
Pressurized Passive Solar Water Heater with Attached Tank
Passive solar water heaters use vacuum tubes with heat pipes and an attached water tank for direct heating of potable water. Sunlight enters the tubes, converting into heat at ~94% efficiency, and is then carried up through the heat pipe to the manifold which heats the water inside of the attached water tank. Water is supplied at the inlet from city/well water, heated and then fed directly into the hot water plumbing of the building.
This unit includes an electric backup water heating element and a TK-7Y controller. The passive solar water heater controller is used for timing of the backup water heating and display of the tank temperature. Settings on the controller help prevent heating water when hot water will not be needed, such as during 4 in the morning. This gives the user the ability to only use electrical backup heating when it may be needed, thus giving the sun a chance to replenish heat.
These heaters are very popular for use in southern parts of America. For applications in more northern regions where freezing is common, it is best to utilize split active solar water heater systems.
This unit heats the domestic water directly. The tank’s hot water outlet connects directly to the home hot water tap.