The cycles your dishwasher has might be wildly different - you should try 'em out

Quick Overview

The speaker details the significant differences in water and energy usage between the normal wash and high-temp wash cycles on a specific Frigidaire dishwasher, noting that the high-temp cycle uses substantially more water (up to 95% more) and energy, despite the manufacturer's data sheets suggesting similar water usage, due to the necessity of running extra rinses and longer heating times to reach the required sanitization temperature.

Key Points: The high-temp wash cycle on the tested Frigidaire dishwasher uses significantly more water (up to 95% more) than the normal wash cycle, contradicting manufacturer data sheets. The normal wash cycle uses 4.2 gallons (16 liters) of water per cycle, while the high-temp wash uses 8.2 gallons (31 liters) per cycle. The high-temp wash cycle requires approximately 10 minutes longer total cycle time compared to the normal wash cycle. The high-temp cycle uses 1.07 kWh of energy, compared to 0.87 kWh for the normal cycle, with the difference largely attributed to heating the water to meet sanitization standards. The normal wash cycle's main wash reaches about 134°F, while the high-temp cycle reaches 150°F or more during the main wash. The dishwasher's design, including the mechanical dispenser actuation and water flow control, is cited as the reason for the extra water usage in high-temp/sanitize modes, suggesting manufacturers may be prioritizing meeting temperature standards over water conservation. The speaker advises users with this model to use the normal cycle unless the high-temp option is strictly necessary, as the savings in water and energy are substantial.

Context: The speaker is conducting a detailed analysis comparing the resource consumption (water and energy) of different wash cycles, specifically the 'Normal Wash' versus the 'High Temp' wash, on a Frigidaire dishwasher. The experiment involves running the dishwasher with a temperature data logger and measuring cycle timing and water usage to reveal discrepancies between manufacturer claims (found on service data sheets) and actual performance, especially when using the high-temp function.