The Majority Of Energy Loss Occurs Through The Roof

Heat energy is lost from buildings through their roofs windows walls floors and through gaps around windows and doors.

The majority of energy loss occurs through the roof.

If you have a 75 deg floor temp the ceiling will radiate about 37 btu hr sf. About 35 of the heat will escape through the walls and through gaps in and around windows and doors and about 10 of heat will disappear through the floor. Proper insulation under your roof in your attic and in your walls will help to cut down on the energy that you are losing. The thermal envelope give or take about 25 of the heat produced by your boiler will escape through the roof of your home.

A small portion of your home s heat is lost through your ceiling. This along with the 99 air volume allows the energy to transfer to the ceiling which can easily reach 110 deg on a 95 deg day. Hot air rises which makes much of the heat that we lose in our homes escapes through the attic. Home heat loss attic.

Of this escaping air the majority of the energy loss occurs through the walls roof and floors as shown in this diagram. 5 of your home s lost heat is through ceilings. A thermogram of house showing areas of heat loss energy is transferred from warm homes to the. This is not necessarily so.

An estimated 25 of all heat loss occurs through the attic or roof of a home. Its roof and windows are the hottest showing that most energy is lost from the house that way. However there are ways that these losses can be reduced. As much as 20 percent of your energy bill can be saved by good roof insulation insulation reduces the costs of heating and cooling by over 40 percent wall insulation can reduce this loss by 2 3 and make your home more comfortable you can lose as much as 10 percent of heat through uninsulated floors.

If you get a home energy audit and find that much of your heat is escaping through the ceiling and into the attic it may be time to test and see how much insulation you have and how much you need. Heat moves in any direction up down or sideways as long as it is moving from a warm spot to a colder one. Heat loss through basement floor. Cracks or holes in an attic along with improperly placed vents allow for much heat loss through the attic space.

Heat loss through basement walls. Heat loss through ceilings 5 heat loss through windows 16 heat loss through doors 3 heat loss. 5 heat loss through cracks in walls windows and doors actual percentages of heat loss for each.