Apparently this is normal, but why does my Presto HeatDish infrared dish heater buzz fairly loudly while warming up and take several minutes to generate substantial heat? Shouldn’t the infrared rays immediately radiate heat when turned on?

It is great that you are utilizing an infrared dish heater to warm up your place. It is quite normal for such heaters to buzz a bit when they are warming up. But, if the buzzing sound is too loud, it is advisable to get it checked by a professional.

Regarding the time taken to generate substantial heat, please remember, infrared heaters work differently than the conventional heaters. They use infrared rays to directly heat up the objects in the room, whereas the traditional heaters heat up the air before heating up the objects. Hence, it is normal for the infrared heaters to take a couple of minutes to start radiating heat into the room.

Also, do keep in mind that the heat generated by your infrared heater will depend on the surroundings – the size of your room, the number of windows and doors, etc. Hence, giving it a little time to penetrate and warm everything up in your room would be a good idea.

In conclusion, your Presto HeatDish infrared dish heater is working as it should be. Just give it some time to warm up, and it will efficiently keep you warm and cozy during those chilly days.