AUX ASW-H09A4/BA-R2DI / AS-H09A4/BA-R2DI air conditioner

Our verdict on the AUX ASW-H09A4/BA-R2DI

In recent years, AUX has made a noticeable leap both in Russia and globally: it’s a factory brand rather than an OEM clone, and it runs its own inverter lineup. Classic Inverter is not the plant’s most entry-level series, and the tested AS-H09A4 sits between the “ultra-budget” inverters and the mainstream mid-tier units. The street price around forty thousand for a “9k” feels a bit high to us—the fair tag would be closer to thirty-five.

Visually, the indoor unit is assembled more neatly than most OEM models from the same plant. The front panel is slim and matte, with sparse perforated strips and a contrasting AUX logo. The texture reads premium, though the brand pushes the logo a touch harder than we’d prefer—taste is subjective. The louvers are perforated with clean edges; you can tell the tooling is a newer generation.

Inside, the design follows a simplified logic. Wi‑Fi is implemented via a USB port—the module is sold separately. The included filter is only the main one; there’s no fine-filtration stage at all. On the plus side, left-right louver control is available from the remote, which isn’t universal in this class. The remote itself is recognizably “AUX style”: a black bezel, a large backlit display, battery level indication, and pink key backlighting when powered on. The buttons are in English; there’s no Russian-localized version.

Fan-speed control follows the “everything on one button” approach: Silence, then five intermediate steps, and Turbo. In practice, that’s seven true speeds with roughly a twofold airflow spread—from 2.8 to 6.5 m/s. As a factory brand, it doesn’t build in “marketing” numbers: what’s stated on the label is what you get in real airflow.

The key metric for an indoor unit is noise in the quietest mode. Our instrument recorded 30.2 dB. That’s a very strong result, especially given that Silence here is not a “nominal” setting but a fully usable working speed, without hidden RPM throttling tricks.

We also ran an additional low-mains stability test using a laboratory variac: at 150 V and 100 V input, the air conditioner made it through without compressor cutouts. For dachas, private-sector homes, and garden communities with sagging line voltage, this is a useful trait—and it also indirectly suggests decent component headroom.

From an engineering standpoint, the inside looks more modest. The heat exchanger is combined: the rear face is two-row with gaps, the front is single-row; 5 mm copper, ten bends over a 56 cm length. By our measurement method, the copper surface area is 0.18 m²—modest even for a 9k model.

The outdoor unit uses an intentionally simple, “retro” design with a protective grille over the heat exchanger—something the premium Japanese brands have been pointedly removing for several years. The dimensions are compact, and for a 9k this falls into the “small and light” category. The compressor is a GMCC KSN series with index 89—modern and not a stripped-down version, but sized right on the limit for a “9k.” The fan motor is a DC JMCC in a composite housing, with double insulation.

By copper area, the outdoor unit also falls short of class expectations: a 5 mm tube, 11 bends over 64 cm yield 0.22 m². This isn’t “brutal cost-cutting,” but it’s precisely because of the pair of heat exchangers that the unit doesn’t deliver the energy efficiency that such a compressor could theoretically achieve.

Vibration, however, is a pleasant surprise: 0.11–0.13—one of the best results of the season in this class. Startup is smooth, there’s no refrigerant “gurgling,” and the outdoor unit’s noise floor is low.

Overall, AUX Classic Inverter fits the formula of an “honest factory inverter with no pretensions.” Strengths include seven true speeds, very low noise and vibration, a handy backlit remote with on-screen battery status, and stable operation at 100 V. Weak points are the small heat exchangers in both units, the lack of a fine filter and a Russian-language remote, and a brand logo that draws a bit too much attention to itself. We recommend it for buyers looking for a basic inverter for a bedroom and who value quiet operation paired with a compact, low-noise outdoor unit—provided you can find the price closer to thirty-five thousand.