Can you hatch a duck egg in hot water cupboard?

It is possible to hatch duck eggs in a heated or warm environment without using an incubator, such as in a warm closet or a hot water heater cupboard. However, you will need to ensure that the temperature and humidity levels are controlled precisely and kept constant throughout the incubation period (around 28-38 degrees celsius) . Additionally, you'll need to provide proper ventilation for fresh air. It's recommended to use specialized incubators designed for hatching eggs to enhance your chances of successfully hatching duck eggs and ensure proper conditions that mimic how birds naturally incubate their eggs.