If your legs are under a table, they won’t feel the warming effect of an IR heater on the ceiling. Objects need to be in line-of-sight to be heated with IR. Thermal mass will keep a room warm for some time after the heat source is turned off. They heat the air in a room as a secondary effect of the thermal mass heating via convection. Radiant or Infrared (IR) heaters directly heat objects in a room (which includes you), creating thermal mass. Hydronic systems are not very responsive (slow heaters), but they do provide a comfortable and quiet heating method. Underfloor hydronic heating relies on conduction to generate thermal mass in the flooring material, but it heats a space via convection because of the lower temperatures involved. This means they will also continue to provide heat after the system is turned off. The classic hydronic system with water filled radiators will heat mostly via convection, but will contribute a smaller amount of radiant heat from the thermal mass of the water and radiators. Their noise and air flow can also be uncomfortable to be in. This situation needs an appliance with a higher heat output and/or a fan that can move a greater volume of air.įan heaters make great personal heaters and are ideal for bathrooms or small rooms, but will struggle with larger rooms. If the appliance is undersized, it may not get the room to a uniform (comfortable) temperature at all. In rooms with a high ceilings or large volume, it takes longer to heat all the air. Where convection heaters do struggle is in poorly insulated or drafty rooms where the heated air simply escapes or cools quickly. The high initial cost of a whole home system or even a high wall split heat pump may be daunting, but if comfort is a priority, then they are well worth the investment. Heat pumps also provide cooling, which is great for those days when the New Zealand summer gets unbearably hot. So here is some good advice to help you select the most effective heating for your home.Ĭonvection heaters (correctly sized) will warm an enclosed space quicker than the equivalent radiant heater.Ĭonvection heaters heat the air and don’t create thermal mass (heat storage) by heating objects, so once they are switched off, the temperature will drop quickly.įor whole home heating, you can’t go past a duct gas furnace or heat pump system for comfort and convenience. But choosing the most effective heater comes down to how and where you plan to use it. Practicality, personal preference and budget will always play their parts. This is what’s happening when you touch your hand on a hot stove.įor space heating convection or radiant (infrared) are the methods of heat energy transfer used by heating appliances. Energy is transferred from the warmer object into the colder object. There are three methods of heat transfer: conductive, convection and radiant.Ĭonductive heat transfer occurs when objects of different temperatures come into direct, physical contact. What’s best - convective or radiant heating?
Home Heating 2 August 2020 What's the Difference Between Convective and Radiant Heating
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