Happybuy 5kw Diesel Air Heater 12V Parking Heater Diesel 4 Holes for Caravan RV and Bus (12V 5KW with Blue LCD Monitor and Silencer) https://www.amazon.com/dp/B07WZJZQDN/ref=cm_sw_r_apan_glt_i_9JVZW3Q59FY0WERJDH1T?_encoding=UTF8&psc=1

That's the exact one I bought, but my buddy bought a different one and they seem to be mostly the exact same.

No smell at all from the heating outlet. The exhaust has a strong diesel smell for about 5 minutes until it warms up then it's pretty much smell free also.