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LOSSES IN HEATING
Value of Storm Windows is the Saving of Fuel
[Welland Tribune, 28 December 1916]
Owing to the rising price of coal and the need for heating our dwellings in winter, the cost of fuel is a large item of expense to the householder. Anything that can be done to reduce this cost without suffering inconvenience from the cold should be welcomed by all. The average householder has but little knowledge of the principles and application of heating, and there are many portions of Canada where the saving fuel by the use of storm windows {commonly known as double windows,} is not appreciated.
Heat is lost from a building in two ways, by {1} radiation, i.e. that transferred through walls, windows, and other exposed surfaces by conduction and lost, and {2} convection currents, or leakage, namely the losses through the openings around windows, doors, etc.
By the opening of outside doors much heat is lost. This, to a great extent, can be overcome by the use of storm outside doors. Better still is the storm porch which allows of one door being closed before the other is opened. This porch may be removable, to permit of the use of verandah space in summer.
The radiation loses are usually of greater importance then the convection. As loses due to radiation from walls, floor, ceiling and doors are determined by the structural features of the house, they are largely unavoidable. The most serious radiation loses are from windows and the saving of heat resulting from the use of storm windows is largely due to the layer of dead air-one of the best nonconductors –between the inner and the storm sashes. Storm windows also prevent uncomfortable drafts. …………
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