Palazzetti Ecofire Clelia TC 12 US: 12 kW sealed pellet stove with top coaxial outlet

Palazzetti Ecofire Clelia TC 12 US is a 12 kW sealed pellet stove designed to combine high heating performance, installation flexibility and simplified maintenance.

The US – Upper Smoke configuration uses a top coaxial connection combining flue-gas evacuation and combustion-air intake, helping reduce rear installation space.

Clelia TC 12 US is supplied as a ventilated stove and can be converted into a ductable heating system by adding the optional Pro2 kit, allowing warm air to be distributed to an additional room.

Why choose Palazzetti Clelia TC 12 US

• 12 kW nominal heat output.
• Minimum heat output of approximately 2.8 kW.
• CC50 sealed combustion.
• Ø80/130 mm top coaxial connection.
• Rounded painted-steel cladding.
• Ceramic glass with air-wash cleaning system.
• Balanced Door.
• Front hot-air outlet.
• Zero Speed Fan.
• Digital touch control panel.
• Daily and weekly programming.
• Designed for optional Universal Gateway.
• T3 technology.
• Complete Burning System.
• Self Cleaning System.
• Speedy Clean.
• Quick Start.
• Star pellet-feed system.
• Optional Pro2 hot-air ducting.
• 15 kg pellet hopper.
• Maximum indicative burn time of approximately 23 hours.
• A+ energy class.
• Italian 5-star environmental rating.

US – Upper Smoke top coaxial connection

The US – Upper Smoke configuration provides a top connection for the chimney system.

The coaxial arrangement combines flue-gas evacuation and combustion-air intake through the same connection.

The system uses an Ø80/130 mm configuration, with the inner Ø80 mm duct dedicated to flue gases and the outer section used for combustion air.

CC50 sealed combustion: what does it mean?

Clelia TC 12 US is a CC50 certified sealed pellet stove.

CC50 means that combustion-chamber airtightness is verified at a pressure difference of up to 50 Pa according to EN 16510.

Combustion air can therefore be supplied directly from outdoors instead of being taken from the installation room.

This is particularly relevant in modern well-insulated buildings, low-energy homes and properties with controlled mechanical ventilation. Installation compatibility must always be assessed by a qualified installer.

Optional Pro2 hot-air ducting

Palazzetti Clelia TC 12 US is supplied as a ventilated stove and can be made ductable by adding the optional Pro2 kit.

The Pro2 kit adds a dedicated ducting fan and allows part of the warm air produced by the stove to be distributed to an additional room through an Ø80 mm duct.

The main-room fan and the ducting system can be controlled separately for more flexible heat distribution.

Duct length and layout must be assessed according to bends, outlets, heat losses and the characteristics of the building.

Zero Speed Fan

The main room fan features Zero Speed Fan. When operating conditions permit, forced ventilation can be completely switched off, allowing heat to be distributed mainly by natural convection and radiation.

T3 technology

Clelia TC 12 US uses Palazzetti's T3 technology, based on four enlarged flue-gas tubes designed for efficient heat exchange, quieter operation and simplified cleaning.

Balanced Door

The Balanced Door system helps maintain correct combustion-chamber sealing while dynamically compensating for thermal expansion.

Self Cleaning System

The Self Cleaning System automatically cleans the pellet burn pot by periodically discharging combustion residues.

This helps reduce routine manual cleaning and maintain consistent operating conditions.

Complete Burning System

The Complete Burning System promotes more complete combustion of pellets and combustion residues, helping minimise residual ash production.

Speedy Clean

The Speedy Clean system provides front access to the flue-gas circuit, simplifying routine cleaning and maintenance.

Quick Start

Quick Start is designed to reduce pellet ignition time and allow the stove to reach normal operating conditions more quickly.

Performance and pellet consumption

Clelia TC 12 US delivers a 12 kW nominal heat output and can modulate down to approximately 2.8 kW.

Nominal efficiency is approximately 90%.

Pellet consumption ranges from approximately 0.64 to 2.75 kg/h. The pellet hopper has a capacity of 15 kg, providing a maximum indicative burn time of approximately 23 hours.

Palazzetti Ecofire Clelia TC 12 US technical specifications

Installation and chimney system

Clelia TC 12 US is designed for an Ø80/130 mm top coaxial connection, combining flue-gas evacuation and combustion-air intake.

Palazzetti technical documentation specifies a reference chimney draught of 12 Pa at nominal output and 10 Pa at partial load.

The chimney system, coaxial adapters and optional Pro2 hot-air ducting must be correctly designed and installed by qualified personnel in accordance with current regulations and Palazzetti's technical instructions.

A+ energy class, 5-star rating and incentives

Palazzetti Ecofire Clelia TC 12 US is rated A+ for energy efficiency and achieves the Italian 5-star environmental rating under D.M. 186.

Palazzetti documentation refers to incentives available for qualifying biomass heating installations. Eligibility is not automatic with the purchase of the stove and depends on the type of project, the appliance being replaced and compliance with all applicable technical and administrative requirements.

For further information, see our guide to Conto Termico 3.0 and incentives for biomass heating appliances.