Tunnel heat units

[Sparkleclean]

This was asked earlier in the thread but is there hot water coming through the prep guns? If not, plumbing that in may be a quick solution until the heaters are figured out.

I can, and do, add hot water to prep guns when it is too cold. but im more looking for a solution to my heat units running all day for nothing, im thinking about adding a radiant tube but not sure at entrance or exit. Someone told me to do it at the exit so the dryers suck in the hot air, which would help drying, and push it towards the entrance instead of blowing the Warm air out from the entrance....