I am interested in purchasing a safe firepit/grills to use beneath my covered (not enclosed)patio. There are several types of pit/grills to choose from and I want one that doesn't get hot on the outside, is durable/longlasting and will not char my cement patio floor. What else should I look for in a fire pit/grill and what types do you recommend. (I want if for warmth and grilling while outdoor entertaining). Please help! Thanks!