供暖

gōng nuǎn shè shī

供暖设施

heating facilities

rè shuǐ gōng nuǎn

热水供暖

hot water heating

nǐ děi xiān bǎ zhōng yāng gōng nuǎn xì tǒng de shuǐ pái jìng zài gēng huàn sàn rè qì

你得先把中央供暖系统的水排净再更换散热器。

You will need to drain the central heating system before you replace the radiator.