I had a professional fog machine from my band that got to hot. It cooked the fog juice. It smelled awful and gummed up every single jet in the fog machine. Fortunately it was brand new so it got replaced (was glad since it was very expensive) so while it won't ignite it does burn and gums things up. Probably won't hurt your pump but not sure it will actually be fog and I think you may plug up the smoke nozzle.