Thermostat TH 091

Product detailed description

• Measured temperature range: 0 - 34.4 °C in 0.2 °C increments
• Temperature setting range: 5 - 30 °C in 0.2 °C increments
• Maximum switching capacity: 0 to 230V, max 5A
• Power supply: 2 x AA alkaline batteries
• Temperature measurement range: 5 to 30 °C
• Dimensions: 154 x 80 x 30 mm
• Storage temperature: - 20 °C to 60 °C

• gas boilers, electric boilers, wood boilers, coal boilers, pellet boilers
• condensing boilers such as Junkers Compact, Viessmann Vitodens 100, ATTACK and many more

Frequently Asked Questions

• How exactly do I choose the output of a AVANSA condensing boiler? The basis is the calculated heat loss of the heated building (most reliably from the project documentation or an energy certificate). If you do not have a project, you can roughly estimate approx. 60-100 W per m2 of floor area for a commonly insulated house built after 2000, or 100-150 W/m2 for an older, uninsulated house - the exact figure, however, varies depending on the number of floors, room height, number and quality of windows, and building orientation. An oversized boiler switches on and off more often (so-called cycling), which shortens its lifespan and reduces efficiency; an undersized boiler, on the other hand, cannot sufficiently heat the house on frosty days.
• Why is a condensing boiler more economical than a conventional one? A condensing boiler also uses the heat hidden in the water vapor produced when burning gas - in a conventional boiler this escapes unused through the flue, while in a condensing boiler it is cooled below the so-called dew point, the vapor condenses, and the released heat is returned to the heating circuit. As a result, condensing boilers achieve an efficiency of approximately 105-110% relative to the calorific value of the gas, compared to the usual 85-92% for conventional boilers.
• What type of flue gas discharge does this boiler need? Most modern condensing boilers are so-called turbo (with a sealed combustion chamber) and require a coaxial (concentric) or separate flue gas discharge and combustion air intake routed through the perimeter wall or roof - so a functional chimney is not required. You will find the exact type and maximum length of the flue (according to diameter 60/100 or 80/125 mm) in the technical documentation for the specific model, or consult our customer service.
• What does the ErP energy class shown for the boiler mean? This is a mandatory efficiency label for heating appliances under the EU ErP (Ecodesign) directive, similar to the energy labels used for refrigerators. Condensing boilers commonly achieve class A, or higher in combination with room control (e.g. A+ when using weather-compensated control and a room thermostat).
• Can I install and connect this boiler myself? No. Connection to the natural gas supply, the electrical network and the flue gas discharge is, by law, reserved exclusively for a person with the relevant authorization (most often an authorized service technician of the given brand or a gas equipment inspection technician). After installation, the boiler must be commissioned by the manufacturer's authorized service, which is usually also a condition of warranty validity.
• What about servicing and warranty? Most manufacturers require a regular annual service inspection by an authorized service provider in order to maintain the warranty even after its standard expiry (an extended warranty with regular servicing is common, especially for brands such as Vaillant, Protherm and Viessmann). You will find the exact warranty terms in the warranty certificate supplied with the boiler.
• What is included in the delivery of this specific product? The exact package contents (the boiler itself, possibly a hot water tank, room control and other accessories in the case of a set) are stated in the product name and in its technical parameters above on this page.