Category 1
What are two benefits home energy audits provide?
Lower monthly utility bills and ability to conserve energy and natural resources.
What does a home energy audit usually start with?
A visual inspection of a home and its energy systems.
What can cause duct leaks?
Initial installation, general wear and tear, equipment or material failures.
Describe a good furnace flame color.
Has an inner and outer mantle, hard blue flame.
What is combustion air?
Home Energy Rating Systems
How can homeowners cut utility bills by 15%?
By following energy audit recommendations.
What are some insulation factors to consider?
Climate, building design, and budget.
What can digital combustion analyzers measure?
Carbon monoxide, oxygen, draft and flue gas temperature.
How can carbon monoxide enter a homes living space?
Back drafting, spillage, cracked heat exchanger.
What type of furnace has a secondary heat exchanger?
High efficiency gas furnace.
How can costs be reduced by as much as 30%?
Through proper insulation and air sealing.
What are some of the most common Residential Energy Auditing Diagnostic tests?
Blower door, infrared scanning, duct leakage, combustion efficiency and safety, HVACR system testing.
How are furnace efficiency ratings determined?
By the amount of heat that is transferred to the heating medium.
How can heat exchangers crack?
Failed weld joints, rust from condensation, stress cracks, old age.
What does LAMEL stand for?
Lighting, Appliance, Miscellaneous Electrical Loads.
12% of a homes total energy bill usually goes toward What?
Water for household use.
What is one of the quickest dollar saving tasks a homeowner can do?
Sealing air ducts.
What is the AFUE rating of a high efficiency furnace?
78% to 80%
Name three common types of flame safeguard controls.
Thermocouple, Flame rectification, cadium sulfide or photo cell.
Needs fuel, oxygen and heat.
Combustion
What is a base load?
Consistent, every day consumers of energy within a residential structure.
What percent of total energy losses can often be blamed on air leakage in a forced air system?
25%
What is the AFUE rating of a high efficiency furnace?
87% to 90%
What does excess air consist of?
Combustion and Dilution Air.
What is combustion air?
Primary and Secondary Air.