Samsung moves heat pump output from China to Gwangju, and the subsidy does the heavy lifting

A 2,132 square metre line is a room inside an existing plant rather than a new factory ^[3]. Spread over the stated annual capacity, that is roughly 0.02 square metres of floor per unit of yearly output ^[14], which is the footprint of final assembly, not of a rebuilt supply chain. Samsung says it will gradually raise domestic sourcing of key components and manufacturing processes at Gwangju ^[7]. Until that happens, the Chinese cost base has moved upstream rather than gone away.

The site choice works the same way. Gwangju already builds Samsung's premium refrigerators, washing machines and air conditioners ^[8], so what is being weighed against Chinese production is the incremental cost of a line, its tooling and its labour, sitting on overhead other products already carry. Roughly five weeks separate test production on the 19th from mass production in late September ^[16], which reads as a transplanted process rather than a new one.

What moved the arithmetic sits on the demand side. Recognising ambient air heat as renewable energy let the state cover up to 70 percent of installation cost and ease the progressive electricity tariff ^[5], and it opened the way for a separate investment tax credit on business and manufacturing equipment ^[18]. The capex credit trims the factory bill. The installation subsidy does something larger: at the cap, the buyer pays about 30 percent of installed cost ^[17], so any Korea-versus-China unit cost gap is discounted by the same factor before the customer sees a price. The eased tariff is what converts an SCOP of 4.9 at 35 degrees ^[1] into a running-cost argument instead of a spec sheet line.

The soft spot is volume. The second rollout Samsung plans to join covers 1,418 households ^[9], about 1.4 percent of the line's annual capacity ^[15]. Capacity is going in ahead of the programme that justifies it, a bet on the incentives holding and on adoption spreading past pilots. In June the Ministry of Climate, Environment and Energy briefed metropolitan governments and public agencies on air- and water-source heat pump projects ^[12], which is where institutional orders would originate if they arrive. Samsung is hedging on the housing side too, with field verification in homes in Yangpyeong, Chungju and Namhae ^[10] and trials with Samsung C&T at research centres on Jeju and in Yongin of an all-in-one unit intended to test multi-unit housing as well as detached houses ^[11]. Detached houses alone will not load a 100,000-unit line.

So the test is running under conditions that favour the answer. The market is captive ^[6], the campus overhead is already paid ^[8], and most of the buyer's bill is public money ^[5]. Samsung says it is the first maker in the government's heating electrification programme to build a dedicated line to bring overseas output home ^[19], and Lim Sung-taek, who runs the Digital Appliances business, presents the line as the base for a wider push into electrified heating ^[13]. Evidence that green incentives have actually reversed a China cost advantage would be a localised component list and a price that survives the subsidy being trimmed. Neither exists yet.