A heat diffuser is used to spread heat evenly to the bottom of your Miriam’s pots and pans.

Almost all electric cooking ranges have a certain amount of unevenness in distribution of heat. Sporadic heat bursts are also common with these stoves.
So if you have a electric stove, with a coil, glass, or ceramic cooktop, make sure to use a heat diffuer between your pot and the source of heat. The pots can form a crack if a diffuser is not used becuase of the uneven and sporadic heat.
A diffuser is not needed when cooking on gas ranges, as these stoves disperse heat more evenly than electric.
If using the pot for long hours of slow cooking (for example, bone broth), please use a heat diffuser regardless of your type of stove.
You don’t need to use a diffuser when cooking in the oven.
If you need a heat diffuser, you can get them here:  MEC Heat Diffusers