Starting a new life in Korea is exciting, but facing the small boiler controller on the wall can be daunting. "What if I set it wrong and get a huge gas bill?" or "Should I turn it off or leave it on when I go out?" These are common anxieties for many international guests.
In this 5-minute guide, we’ll turn your confusion into confidence so you can stay warm without breaking the bank.
1. The 3 Key Modes You Must Know
In Korea, a boiler isn't just an on/off switch. Choosing the right mode for each situation is the secret to saving money.
Step 1: Indoor Heating (난방, Nanbang)
When to use: When you are staying at home.
Optimal Temp: 21–23°C.
Pro Tip: Setting it above 25°C can lead to a "gas bill bomb." Wear indoor layers instead of cranking up the heat.
Step 2: Timer Mode (예약, Yeyak) – Best for Daily Use
When to use: When you leave for school/work (8–10 hours).
How it works: It heats the floor for a set duration at specific intervals (e.g., 20 mins every 3 hours).
Why? It keeps the floor from cooling down completely, using less energy to reheat when you return.
Step 3: Away Mode (외출, Oechul) – For Long Trips
When to use: Only when leaving for more than 48 hours.
Warning: In extreme cold (below -10°C), "Away Mode" might not prevent pipes from freezing in older buildings. If it's freezing outside, consider leaving the heating on at a low temperature (17–18°C) instead.
2. Real-Life Scenarios & Solutions
Q: "I turned the boiler completely off to save money while I'm out."
This is very dangerous! Winters in Korea are extremely cold, and turning the boiler off completely can lead to Frozen Pipes. Repairing frozen pipes can be very expensive. Always maintain Timer (예약, Yeyak) or Away (외출, Oechul) mode instead of turning it off.
Q: "The floor is warm, but the shower water is cold!"
Solution: Check the Hot Water (온수, Onsu) setting.
Ensure it is set to 'Medium' (중). Setting it to 'High' wastes gas by heating water to a temperature you'll just end up diluting with cold water anyway.
Some older controllers require you to press 'Hot Water Only' (온수전용). Remember to switch back to 'Heating' after your shower!
3. Bonus Tip: The 'Bbok-bbok-i' Secret
Visit a Daiso and look for insulation film called 'Bbok-bbok-i'.
Spray water on your window.
Stick the bubble wrap on.
This simple trick can raise your indoor temperature by 2–3°C naturally by blocking cold drafts.
4. Quick Korean Dictionary
난방 (Nanbang): Heating
외출 (Oechul): Away / Outing
예약 (Yeyak): Timer / Reservation
온수 (Onsu): Hot Water
동파 (Dongpa): Frozen Pipes
고장 (Gojang): Malfunction / Error
Enkostay is Here to Help!
Boiler controllers vary by building (Rinnai, Navien, Kiturami, etc.). If you see an Error Code (e.g., E1, 03) or your device looks different from this guide, don't panic!
Contact your host immediately by Enko Chat. We’ll help you troubleshoot so you can stay cozy all winter long !