Well I recently got a "convection" heater, for the first time in my life.
I actually thought it works the same as a blow-heater, but nope - for one thing, a convection heater is completely silent. It merely makes the air streaming through it, hot.
Not sure it's very effective though.
So I have it on, with my blow-heater. Now my head hurts from the blow heater. Ouch.