Why does my propane oven take longer to heat than a natural gas oven?

Propane ovens typically take longer to heat than natural gas ovens due to the differences in combustion characteristics and energy content. Propane has a higher energy content per unit volume than natural gas, but it burns at a different rate, resulting in less efficient heat transfer initially. Additionally, propane ovens may have less optimal burner designs or lower BTU output, leading to longer preheat times. These factors combined can contribute to the slower heating of propane ovens compared to their natural gas counterparts.