I use the device to direct steam into a special container containing hay for my asmathisches horse. I fill the tank with water (using the MAX mark). A timer ensures 2 times half-hour operation in the morning and evening. The hay smells fantastic and has just the right moisture. The device is filled every day. All 1.5 days also would. For 2 days, it would probably not be enough. Another horse owner uses a weaker system from the hardware store. The results are noticeably worse. At least for this field of application should grab even the elite class.