GAS BBQ FIRE MANAGEMENT
A Gas BBQ is not ideal for Low N Slow but you can make it work.
Do an experiment!
Place a heatproof pot filled with oil inside the BBQ
Light one burner on one side and set it to low flame
One hour later, test the temperature of the oil, this will tell you the lowest temperature your BBQ will run at
Increase the Gas to High and measure again in another hour.
Now you can do it again with the two outside burners on.
Write all this down, Burner setting, placement and temperature. This is valuable information.
Heat management in a Gas BBQ can be tricky. The biggest problem is the difference between High and Low on the control knob, Low is not significantly lower than High.
So to control the heat, I’ll have only one burner on, every second burner or maybe just the two outer ones.
Moving the fire around inside your BBQ will produce different effects and heat zones
I like to remove the flat plate unless I’m using it. The flat plate will drastically change the way heat moves inside your BBQ
If your Gas BBQ will run at a sufficiently low temperature then you could consider using it for Low N Slow but I suspect it will not be economical to do so.
Gas BBQs are designed for Medium Roasting Heats and Grilling.
You can use a Smoke tube or even just a tray to smoulder wood chips for smoke. This is a great way to get some smoke flavour onto a steak or a roast.