1. 采暖系统：heating pipeline采暖管道 | heating system采暖系统 | heavy work重作业

2. 暖气系统：heater 加热器;热水炉 | heating system 暖气系统 | heavily landscaped 遍植花木

3. 加热系统：heating surface 放热面 | heating system 加热系统 | heating time 加热时间

4. 供热系统：heating surface 加热表面 | heating system 供热系统 | heating tape 发热带

noun

1. utility to warm a building

e.g. the heating system wasn't working
they have radiant heating

Synonym: heating plantheatingheat