It works. Took about 23 minutes to reach 50 degrees.
I want to thank everyone here for their help.
In case anybody wants to repeat my success, here is what I did:
this heater element:
https://www.mcmaster.com/3575K411/
with this fan:
https://www.mcmaster.com/1976K95/
this SSR:
https://www.amazon.com/gp/product/B07FVR37QN/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
this thermistor:
https://www.amazon.com/gp/product/B07V6YBFSY/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
and this TCO:
https://www.amazon.com/gp/product/B07JM2DB67/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
Wired them up per this diagram
@mrehorstdmd said in Chamber heater plan:
Wiring: