I have done both used the coffee pot to make ice tea just fill with water and drop in 4-6 tea bags.Then pour into a pitcher add more water & sugar is desired. & I have done sun tea.
I also liked to make homemade simple syrup here is the recipe. Simple Syrup which makes tea that is already cold sweetened and you avoid cloudy tea as well if you have a household where some people like sweetened and some don't.I make the Simple Syrup and pour into a mason jar & refrig it. Using approx 2 tsp per 32 oz of tea
I recently at a yard sale purchased a Mr. Coffee Ice Tea maker for $3.00 love it it allows me to make a batch of tea fresh quickly and it free's up the coffee pot.