Should my oven have a hole like this? I moved to a new apartment and under the far left burner is a hole into the oven:



That is my pizza stone you are seeing through the hole. 

I understand that the oven needs some ventilation, but this seems like it would cause a lot of heat loss. Indeed the burner and any pan sitting there get quite warm while the oven is in use, I can boil water with the excess heat if a kettle is left there long enough (and the oven is very hot, like when I bake bread).
That looks like a opening below a surface burner; I have seen stoves that vent that oven like that.Use the heat if you can.