Wood, gas and pellet burning stoves; fireplaces; outdoor fireplaces; electric fireplaces; fireplace inserts comprised of gas fireplace log sets; barbecues and grills; electric space heaters; portable freestanding electric and gas patio heaters; outdoor heaters, namely, portable electric heaters; gas, oil, electric, waste oil, wood and pellet boilers, furnaces and hot water heaters, for domestic and commercial use; solar water heaters; air-to-air heat pumps, geothermal heat pumps, water-to-air and water-to-water heat pumps; air conditioners