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An indoor location in Bansko, Bulgaria, depicts a technical demonstration or training setup for a heating system against a white wall. The primary apparatus includes a white cylindrical hot water storage tank (TESY DHW) with a top-mounted RTS system control unit featuring a blue analog clock. This unit is interconnected via various pipes (copper and grey plastic) to a central grey wall-mounted heat exchanger or manifold. A red spherical expansion tank with a pressure gauge is situated on the floor beneath the piping system.

Three individuals are present. Two males are positioned at the central grey unit: one in a white polo shirt and dark, patterned trousers, whose right hand is near a yellow component on the unit; and another, partially obscured, in a dark suit jacket, also focused on the unit. A female, seen from the rear in blue jeans and a dark long-sleeved top, stands to the left, observing the system. The floor is light-colored concrete or linoleum. Visible floor objects include a grey rectangular box labeled 'NUBE', a dark garment, and blue and yellow soft seating in the foreground. Small tools and a white roll of tape are present near the red expansion tank. The ceiling features fluorescent lighting fixtures.
1914\HGAV5o/116

Mar 18, 2026

Bansko, Bulgaria

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An indoor location in Bansko, Bulgaria, depicts a technical demonstration or training setup for a heating system against a white wall. The primary apparatus includes a white cylindrical hot water storage tank (TESY DHW) with a top-mounted RTS system control unit featuring a blue analog clock. This unit is interconnected via various pipes (copper and grey plastic) to a central grey wall-mounted heat exchanger or manifold. A red spherical expansion tank with a pressure gauge is situated on the floor beneath the piping system. Three individuals are present. Two males are positioned at the central grey unit: one in a white polo shirt and dark, patterned trousers, whose right hand is near a yellow component on the unit; and another, partially obscured, in a dark suit jacket, also focused on the unit. A female, seen from the rear in blue jeans and a dark long-sleeved top, stands to the left, observing the system. The floor is light-colored concrete or linoleum. Visible floor objects include a grey rectangular box labeled 'NUBE', a dark garment, and blue and yellow soft seating in the foreground. Small tools and a white roll of tape are present near the red expansion tank. The ceiling features fluorescent lighting fixtures.

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1914\HGAV5o/116

Mar 18, 2026

Bansko, Bulgaria

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