Should I rent a water purifier or air purifier in Korea, and how do the rental services work?

Rental (렌탈) is a hugely popular and very Korean way to get a water purifier (정수기) or air purifier (공기청정기), and it can make sense. The big providers are Coway (코웨이), SK Magic, Cuckoo, and LG, and instead of buying outright you pay a monthly fee, typically around 15,000 to 40,000 won depending on the model. The appeal is that the fee includes regular maintenance: a visiting service manager (코디) comes every few months to replace filters and clean the unit, which is the main reason locals rent rather than buy. The catch is the contract, usually a three-to-five-year commitment with an early-termination fee, so it suits longer stays more than a one-year stint.

To sign up as a foreigner you generally need your ARC and a Korean bank account or card for the automatic monthly payment, applying by phone, online, or at a shop. If you are here short-term, buying a mid-range air purifier outright from Coupang or a mart (a decent one runs 100,000 to 300,000 won) and replacing filters yourself is often cheaper and simpler than a multi-year rental. For water, Seoul tap water (Arisu) is officially safe to drink, so a purifier is more about taste and preference than necessity, and a simple filter pitcher is a cheap middle ground. Air purifiers, on the other hand, are genuinely useful during spring fine-dust season.