Cold to lukewarm water is appropriate for dilution, as all of our efficacy testing is conducted using room-temperature water.
Using hot water to dilute Rescue™ Concentrate does not provide any advantages from a cleaning or disinfection perspective. The use of hot water can cause excess aerosolization of any disinfectant, therefore the general recommendation is to dilute the concentrate with cold or room-temperature water. Additionally, not using hot water reduces utility costs and improves environmental sustainability.
You may also find these resources useful:
Video: Rescue Concentrate - How to Dilute
Video: How to use Rescue Concentrate
Video: Avoid Aerosolization