I think that you may be doing yourself and your customers a disservice. I went through the same process as you and initially rejected spending so much on a heated bag vs a “non heated”. It may be hard to believe right now, however, they will more than pay for themselves within the first few months. You will ELIMINATE all complaints of “it was cold” with the subsequent no charge replacements. Your drivers tips will increase. If you are using heated bags and your competition is not, advertise the heck out of that. If they ARE and your not, you are losing customers.
When you get slammed and that order sits on the oven for 20 minutes or more, then sits in the drivers car, your customers not only get the food late, it’s dried out and cold as well. With the heated bags they can sit in store for 20-30 minutes, plus delivery time and the customer still gets HOT food.
I rank our POS, Hot Bags and new oven as all equally important in our ongoing growth (50% last year). Clive.