Aux Electric Co, one of China’s top makers of air conditioners, is targeting to go public in Hong Kong Special Administrative Region as early as September in a listing that could raise $600 million to $800 million, according to people familiar with the matter.

Deliberations are ongoing, and the size and timing of the deal may change, the people said. 

Aux Electric didn’t immediately respond to a request for comment.

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At that size, the deal would be among the larger ones in Hong Kong that aren’t second floats of China-listed firms — the type of deals that has dominated the city’s first-time share sales this year.

The company is tied to the Aux Group, whose businesses range from air conditioning to medical services. It plans to use part of the proceeds for establishing research-and-development centers in Europe, the Americas and other locations, according to the company’s listing application.

China International Capital Corp is the sole sponsor of the IPO.