1. devices that reduce waste and increase efficiency, especially in heating systems by recovering heat from exhaust gases
Usage: technical; engineering
2. people who practice economy or frugality in spending money or using resources

Examples

• The factory installed new economizers to reduce fuel consumption.
• Steam economizers can improve boiler efficiency by up to 10 percent.
• The power plant’s economizers recover heat from flue gases.
• My grandparents were great economizers during the Depression.
• Natural economizers often reuse items instead of throwing them away.
• The company hired economizers to reduce operational costs.
• Industrial economizers help businesses save thousands on energy bills.