On Mon, 26 Oct 2020 15:49:45 +0000, Andrew wrote:

On 26/10/2020 13:10, Jeff Layman wrote:
No idea, but it would it be any different from heating/cooling through
ducting in commercial buildings?

They tend to have a more sophisticated fire detection systems, like a
building fire alarm to start with !. This should shut down the HVAC
immediately.

Mine didn't.