Understanding Home Heat Transfer
Whether you are designing a new home or troubleshooting problems with your existing house, accurate estimation of heat transfer is critical. Getting it right can save you money and make your work more reliable and efficient. Inaccurate calculations are easy to make, and a few common errors can have a big impact on your results. This article breaks down how to calculate heat loss from walls and windows accurately.
The three Insulation Contractor ways that heat moves in your home are conduction, convection and radiation. Conduction happens when molecules directly contact each other, such as a hot stove burner touching the bottom of a pot. Convection is the movement of air or liquid through a fluid with a temperature gradient, such as warm air rising over your heater. The lower density of the warmer air causes it to rise while the cooler air sinks. Radiation transfers energy through electromagnetic waves, such as visible and invisible light, like sunlight or low-wavelength infrared from your heater.
Heat from outside will also move into your home through air infiltration, which is the flow of cooled air into a house and warm unconditioned air replacing it. The flow of cool outside air can be greatly reduced with effective insulation, duct sealing and air sealing. However, the summer heat will still find its way into your house through any gap or crack that invites air exchange. This is called the reverse stack effect, and it can have a big impact on your cooling costs.
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