From my testing:
Above 50 degrees ambient outside air temp. I use the 2 1" gas valves open full until target temp is reached. Then I will close them to maintain said target.
Below 50 degrees ambient outside air temp I will open the Middle 1" pipe. I have also built an adapter to fit a small heat gun to power draft the fire. I will boost the fire to 275 and let it slowly drop at times if the outside temp is below 50.
These are rough numbers only.
I just received my first power draft controller that I am going to try on Thursday. If anyone wants to come check it out PM me.
Name:Dan Other Name:Chop Team: Chop Quey! Smokers:Home Grown "The Tower" 4 UDS, ECB, OTP, Blue Thermo Pen. Harbor Freight Weed Burner lights my fire! ADD a .com to my name and you shall find my blog