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Comparison Bosch Tronic Heat 3000 12 11.88 kW
400 H
vs Bosch Tronic Heat 3500 12 11.88 kW
400 H

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Bosch Tronic Heat 3000 12 11.88 kW 400 H
Bosch Tronic Heat 3500 12 11.88 kW 400 H
Bosch Tronic Heat 3000 12 11.88 kW
400 H
Bosch Tronic Heat 3500 12 11.88 kW
400 H
from $527.47 up to $651.52
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from $641.02 up to $822.11
Outdated Product
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Main
Frost protection. Connecting external devices. Remote control. Self-diagnosis function.
Energy sourceelectricityelectricity
Installationwallwall
Typesingle-circuit (heating only)single-circuit (heating only)
Heating area95 m²95 m²
Technical specs
Heat output11.88 kW11.88 kW
Min. heat output4 kW4 kW
Power supply400 V400 V
Coolant max. T85 °С85 °С
Heating circuit max. pressure3 bar3 bar
Consumer specs
"Summer" mode
Circulation pump
Boiler specs
Efficiency99.7 %99.7 %
Combustion chamberno chamberno chamber
Expansion vessel capacity7 L
Connections
Central heating flow3/4"3/4"
Central heating return3/4"3/4"
Safety
Safety systems
water overheating
frost protection
water overheating
frost protection
More specs
Dimensions (HxWxD)712x330x193 mm712x330x273 mm
Weight17.8 kg17 kg
Added to E-Catalogoctober 2016september 2016

"Summer" mode

It is an operating mode designed for the warm season. In this mode, it works only to provide domestic hot water, and the heating is turned off. If the boiler is equipped with an outside temperature sensor, this sensor is also switched off in summer mode so that the heating does not turn on at night when the outside temperature drops.

Circulation pump

The presence in the boiler of circulation pump.

Such a pump ensures the movement of the coolant along the heating circuit, due to which the heat is evenly and efficiently distributed over the radiators. Similar devices are also available as separate devices; however, buying a boiler with a circulation pump eliminates the need to purchase additional equipment and simplifies the heating system. The disadvantages of such models include the complex design: if a separate pump fails, it is enough to replace only it, and the module built into the boiler may require complex and expensive repairs, and the heating system becomes unavailable.

Also note that it is theoretically possible to build a heating system without a pump, based on natural circulation; however, such systems have several disadvantages, so it is still preferable to use forced circulation.

Expansion vessel capacity

The capacity of the expansion tank supplied with the boiler.

The expansion tank is designed to drain excess water from the heating system when the total volume of liquid increases as a result of heating. It consists of two parts connected by a flexible membrane: in one, hermetically closed, there is air under pressure; in the other, excess water enters, compressing the membrane. In this way, a catastrophic increase in pressure in the heating circuit is avoided. The optimal volume of the expansion tank depends on several system parameters, primarily the volume and composition of the coolant; detailed recommendations for calculations can be found in special sources.
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