Gary, Can you use heat tape? Brisk Heat makes every kind of flexible electric heat tape. Brent amron gary wrote: > Hello: > > I have a 10"x1" gas mixing chamber. My diffusion gases > are N2 and C2H2. Currently, gas mixing chamber is at > ambient. I want to keep the temperature of my gas > mixing chamber around 100 deg C in order to have > better diffusion of gases before they go to the PVD > chamber. Are there any heaters or heating techniques > that I can use outside my PVD to keep this gas mixing > chamber hotter than ambient?