Fireplaces; Gas, electric, wood burning, and solid fuel burning fireplaces; Fireplace inserts for adapting fireplaces for use with different fuels; Heating stoves; Gas, electric, wood burning, pellet burning, and solid fuel burning stoves; Barbecue grills; Gas grills; Charcoal grills; Pizza ovens; Gas patio heaters; Gas fired room heaters; Gas heat generators; Portable fire pits; Fire tables; Hot tubs; Spas in the nature of heated pools