BPI Building Analyst I Training

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Energy House Middle School / High School
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When we look for ways to save energy in a home,
we must keep in mind

• The health and safety of the occupants
• Indoor air quality adequate ventilation
• The comfort of the occupants

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The energy use of a home, as well as the quality
of the indoor air is affected by interactions
between

• Heat (temperature)
• Air
• Moisture
• Occupants
• Pollutants

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Everythings ConnectedThe House As a System
Concept
Environment
Heat
Occupants
Moisture
Air
Building
Pollutants
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Reducing Heat Loss from Your Home.
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Heat Transfer

• Heat is a form of energy.
• Heat moves from areas of high temperature to low
  temperature.
• When heat moves from place to place, it is
  referred to as heat transfer.
• Heat transfer occurs in three ways
• Conduction
• Convection
• Radiation

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Heat Transfer

• Radiation
• Transfers heat from a warm object to a cold
  object that
• are not in contact with each other.
• Unlike convection or conduction, radiation does
  not require a medium to carry the heat.
• The objects must be in sight of one another.

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Heat Transfer

• Conduction
• Is the transfer of heat between objects that are
  in contact.
• Requires a solid, liquid, or gas medium.

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Slowing Heat Loss

• Heat moves through walls, floors, and ceilings
  via conduction.
• We use insulation in houses to slow conduction
  through the walls and ceilings.
• This helps keep the house warmer in the winter
  and cooler in the summer.

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Why Is Insulation Fluffy?

• Small pockets in Insulation trap still air.
• The air is the insulator!

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R-Value

• R-Value The measured resistance of a material to
  heat transfer (how well a material resists heat
  transfer).
• A higher R-Value means higher insulation value.

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Common Insulation Types

• 1. Fiberglass Batts
• 2. Cellulose
• 3. Foam Board Insulation

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Typical Installation Fiberglass
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Typical Installation Cellulose
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Typical Installation Rigid Board
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Signs of Heat Loss
If you see this
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Cause of Heat Loss
You might find this
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