Back to notes
What are two benefits of using a tankless water heater compared to a traditional tank heater?
Press to flip
Tankless water heaters provide hot water on demand without standby energy losses, and offer a constant supply of hot water.
What percentage of home energy use is typically accounted for by heating and cooling systems?
Heating and cooling account for about 50% of home energy use.
What are two strategies mentioned for reducing heating costs through thermostat management?
Lowering the thermostat at night and using programmable thermostats can reduce heating costs.
Approximately what fraction of heat loss in a home is due to windows and doors?
Windows and doors account for about one-third of heat loss in a home.
How long can an energy audit take, and what factors influence this time?
An energy audit can take 30 minutes to 4 hours depending on the size of the home.
Why is it important to change air filters in HVAC systems periodically?
Replacing air filters is important to maintain system efficiency and prevent energy waste.
What role do ceiling fans play in improving energy efficiency related to air conditioning?
Ceiling fans can often replace air conditioners, reducing the need for refrigerated air.
How much can a programmable thermostat save annually on energy costs?
A programmable thermostat can save up to $150 a year.
What is the primary advantage of Energy Star appliances?
Energy Star appliances are energy-efficient, reducing energy bills and lowering carbon emissions.
What is a significant source of heat loss in homes that can be mitigated by adding insulation?
Attics often suffer from poor insulation leading to significant heat loss.
By switching from incandescent bulbs to LEDs or CFLs, how much can lighting energy use be reduced?
Lighting energy use can be reduced by 50-75%.
By how much can a well-designed landscape reduce energy costs?
A properly designed landscape can save up to 25% on energy costs.
How do night curtains contribute to energy efficiency?
Night curtains help insulate rooms, reducing the need for additional heating.
What are two methods of enhancing natural lighting through daylighting?
Installing skylights and light tubes can enhance natural lighting.
What portion of home water use do toilets account for, and how do modern toilets impact this?
Toilets account for 30-40% of home water use; modern low-flow toilets can save significant water.
Previous
Next