Coolberg CS-12SH1-IN / CS-12SH1-OUT air conditioner

Our verdict on the Coolberg CS-12SH1-IN

Coolberg is a relatively new name on the Russian market, and it’s not easy to identify the factory by appearance alone: the indoor unit design is deliberately minimalist and the remote is generic. But the sticker under the housing clears things up: the model is produced by TCL, one of the largest OEM manufacturers with its own in-house brand. In other words, Coolberg in this family is a junior line with different branding, but coming off the same production line.

Here we have the City series, a 12K model in an on/off format. It’s 2025, and the very fact of a 12K on/off unit for 45,000 rubles raises questions about value: the 7K in the same lineup costs around 30,000—also not cheap by today’s standards. The 12K format is for “hot rooms”: in southern countries air conditioners often don’t even start at lower capacities, and Coolberg City is clearly aimed at regions where the unit will actually be run hard for cooling.

Inside, the build is straightforward. Against the flimsy plastics of some rivals, one clear plus is that the Wi‑Fi module is factory-installed. That’s not typical for a 12K on/off unit: even well-known brands still sell Wi‑Fi as an option on their pricier inverter models. The fine filtration filters are not included—an all-too-common omission in the budget segment. Louver control is implemented in four directions from the remote; the package includes a standard backlit remote with English button labels.

This model offers seven fan speeds—Silent, five intermediate steps, and Power. They’re controlled by a single button, with quick access to the end modes. Airflow ramps up smoothly without abrupt steps; in our measurement, at minimum speed the unit delivered 34.1 dB—still within an acceptable window for a 12K on/off, about one-third higher than the seasonal average. There’s no audible mechanical tone; only the air noise is present.

Mains stress test on a lab variac: at 150 V the air conditioner runs calmly and consistently “eats” 1 kW; at 100 V the compressor already cuts out. For a typical apartment outlet the margin is more than sufficient; for a remote dacha with a long supply line it’s borderline.

Inside, assembly is uneven: the main lines are heavy-duty, with 7 mm copper (a rare bit of generosity in the on/off segment), but the wiring and a pair of spare connectors routed under the top section are done carelessly. The indoor heat exchanger is dual-row, 12 loops at 57 cm, with a surface area of 0.30 m². For a 12K model, that’s a standard figure.

The outdoor unit weighs 26 kg, neatly assembled, with double insulation around the compressor. The compressor is a GMCC with index 135 (for about 4 kW of cooling), i.e., correctly matched without undersizing. The copper surface area of the outdoor heat exchanger is 0.37 m². That’s a restrained number: for a 12K model you’d like to see 0.40–0.50, but there’s no aggressive cost-cutting here either. Vibration is 0.20, a normal value.

One curious practical detail: the housing molds and the quality of the copper tubing on Coolberg are identical to what we see on other, more famous brands from the same supplier. In other words, TCL didn’t “cheap out” on Coolberg compared with its senior brands—the difference is only in price and packaging. From an engineering standpoint, Coolberg is no worse than its peers on the bench.

Bottom line on Coolberg City: it’s a solid on/off air conditioner with an honestly sized compressor, heavy-gauge copper, and Wi‑Fi out of the box—its main issue is its own retail price. Strengths: seven fan speeds, built-in Wi‑Fi, GMCC for 4 kW, thick 7 mm copper, low vibration, stable operation at 150 V. Weak points: pricey for the class, no fine filtration filter, no inverter, heating limited to −7 °C. We recommend it to those who genuinely need a 12K on/off unit—for a hot room, a south-facing office, an infrequently visited southern dacha—and who are willing to find it below official retail pricing.