This is cold air coming in from the right, and as it is heated by the radiator on the left, it rises.So that's how you can raise air upwards. By heating it.Also:
- to rise
- to get up
- to set out
- to start
- to appear
- to launch
- to initiate (action)
- to draft
- to establish
- to get (from a counter or warehouse)
- verb suffix for to start
- (before place or time) starting from
- measure word for unpredictable events, case, instance, batch, group