In most outdoor or difficult-to-heat indoor applications, there are 2 methods when looking at the size and quantity of heaters required.
Option 1 is to comfort heat the entire area based on the total dimensions of the space, regardless of whether the entire area is being fully occupied or not.
Option 2 is to spot heat the high use areas, such as over outdoor tables, BBQ’s, lounges, assembly lines or indoor work-stations.
Often it is more practical and efficient to spot heat these areas. Spot heating will help to reduce the initial capital cost, as well as the on-going running costs. Spot heating will allow the area to be “zoned”, meaning heating only the areas that are being used, such as tables in a restaurant or outdoor alfresco area.