Blocks for biofireplaces from the producer of Kronco.
Link to the manufacturer: https://kronco.ru/ 
Sizes: 250 mm, 500 mm, 800 mm, 1000 mm, 1200 mm, 1500 mm (along the line of fire).
All fireboxes with customized flame. In the folder 3 textures of fire (diffuse + opacity) - you can choose to your liking.
For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.