Energy and Sustainability Professionals Flashcards

What is the primary purpose of energy codes in building construction?

Answer: To increase energy efficiency and reduce energy consumption

The primary purpose of energy codes in building construction, such as the International Energy Conservation Code (IECC), is to increase energy efficiency and reduce overall energy consumption. These codes establish minimum requirements for building envelopes, HVAC systems, lighting, and water heating to minimize energy waste. This helps lower utility costs, conserve natural resources, and reduce environmental impact.

According to the International Energy Conservation Code (IECC), what is the minimum R-value for insulation in residential exterior walls in a typical climate zone?

Answer: R-13

The International Energy Conservation Code (IECC) sets minimum R-value requirements for insulation in various building components, which vary based on climate zone. For residential exterior walls in many typical climate zones, an R-13 insulation value is often the minimum standard. This R-value indicates the insulation's resistance to heat flow, contributing significantly to the building's thermal performance and energy efficiency.

What does the term "U-factor" refer to in the context of energy-efficient windows?

Answer: The rate of heat transfer through a window

The U-factor is a measure of a window's thermal transmittance, indicating the rate at which heat transfers through it. A lower U-factor signifies better insulating properties, meaning less heat escapes from or enters the building through the window. This value is a crucial indicator of a window's energy efficiency, helping to maintain comfortable indoor temperatures and reduce heating and cooling costs.

What is the purpose of a blower door test in a residential building?

Answer: To measure air leakage in the building’s envelope

A blower door test is a diagnostic tool used to measure the airtightness of a building's envelope. It involves using a powerful fan to depressurize or pressurize the house, revealing uncontrolled air leakage points. Identifying and sealing these leaks is critical for improving energy efficiency, reducing drafts, enhancing indoor air quality, and preventing moisture problems.

According to the IECC, which type of lighting is recommended for energy efficiency in commercial spaces?

Answer: Light Emitting Diodes (LEDs)

The International Energy Conservation Code (IECC) recommends Light Emitting Diodes (LEDs) for energy efficiency in commercial spaces due to their superior performance. LEDs consume significantly less energy, have a much longer lifespan, and offer excellent light quality compared to traditional lighting technologies like incandescent or even compact fluorescent lamps (CFLs). This results in substantial energy savings and reduced maintenance costs.