Final answer:
An appliance with an EnerGuide label shows its energy consumption, enabling consumers to compare efficiency with similar products. Higher EER indicates more energy efficiency and cost savings in operation. Energy Star is another program that uses a star rating to denote efficiency.
Step-by-step explanation:
When an appliance has an EnerGuide label attached, it means that the appliance's energy consumption rate can be compared with other similar appliances. The EnerGuide label is a tool for consumers in Canada to determine how much energy appliances use and help them save money on their utility bills. Appliances with higher energy efficiency ratings (EER) are more efficient and cost less to operate. This rating, which includes room air conditioners, is expressed in British thermal units (Btu) per hour of heating or cooling divided by the power input in watts. For instance, a room air conditioner with an EER between 6 and 12 signifies its efficiency range, and the higher the EER, the more energy-efficient the unit is considered. Additionally, products may also be rated by similar programs like Energy Star, which uses a 5-star rating system.