A modular outdoor fireplace and brick oven system is configured to be easily transportable and assembled. The modular system has a chimney unit and at least one modular unit. The modular unit may be one of an oven unit and a fireplace unit. The chimney unit and at least one modular unit are uniquely aligned using a plurality of alignment means. The alignment means are disposed between the assembled units on a top surface and a bottom surface of each modular unit and the chimney unit. The modular units are designed to allow airflow from each modular unit to reach the chimney unit. The modular units may further have lifting holes designed to easily move the modular units or assembled system with a forklift, lifting straps, and slings.

A modular outdoor fireplace and brick oven system is configured to be easily transportable and assembled. The modular system has a chimney unit and at least one modular unit. The modular unit may be one of an oven unit and a fireplace unit. The chimney unit and at least one modular unit are uniquely aligned using a plurality of alignment means. The alignment means are disposed between the assembled units on a top surface and a bottom surface of each modular unit and the chimney unit. The modular units are designed to allow airflow from each modular unit to reach the chimney unit. The modular units may further have lifting holes designed to easily move the modular units or assembled system with a forklift, lifting straps, and slings.

A modular outdoor fireplace and brick oven system is configured to be easily transportable and assembled. The modular system has a chimney unit and at least one modular unit. The modular unit may be one of an oven unit and a fireplace unit. The chimney unit and at least one modular unit are uniquely aligned using a plurality of alignment means. The alignment means are disposed between the assembled units on a top surface and a bottom surface of each modular unit and the chimney unit. The modular units are designed to allow airflow from each modular unit to reach the chimney unit. The modular units may further have lifting holes designed to easily move the modular units or assembled system with a forklift, lifting straps, and slings.

A modular outdoor fireplace and brick oven system is configured to be easily transportable and assembled. The modular system has a chimney unit and at least one modular unit. The modular unit may be one of an oven unit and a fireplace unit. The chimney unit and at least one modular unit are uniquely aligned using a plurality of alignment means. The alignment means are disposed between the assembled units on a top surface and a bottom surface of each modular unit and the chimney unit. The modular units are designed to allow airflow from each modular unit to reach the chimney unit. The modular units may further have lifting holes designed to easily move the modular units or assembled system with a forklift, lifting straps, and slings.

A furnace using biomass pellets as fuel, comprising a housing arranged on a base, wherein the housing is internally provided with a burning chamber, the bottom of which is provided with a burning grate, and the burning chamber is connected with a primary oxygen supply device; the primary oxygen supply device comprises an oxygen supply cylinder that communicates with the outside, and the bottom end of the oxygen supply cylinder is connected with an oxygen supply pipe II configured to blow air over the burning grate, and a plurality of air outlet holes I is defined in the oxygen supply cylinder.

A furnace using biomass pellets as fuel, comprising a housing arranged on a base, wherein the housing is internally provided with a burning chamber, the bottom of which is provided with a burning grate, and the burning chamber is connected with a primary oxygen supply device; the primary oxygen supply device comprises an oxygen supply cylinder that communicates with the outside, and the bottom end of the oxygen supply cylinder is connected with an oxygen supply pipe II configured to blow air over the burning grate, and a plurality of air outlet holes I is defined in the oxygen supply cylinder.

A solid fuel burning cabinet circular heating appliance achieves improved emissions performance by providing a secondary air combustion path that preheats secondary combustion air. The firebox is selectively insulated such that areas of the firebox that do not preheat combustion air retain heat in the firebox while areas of the firebox that transfer heat into the combustion air transfer heat through the firebox into the incoming combustion air. The exhaust air path from the firebox to a chimney is also uninsulated to allow relatively quick heat transfer into a room in which the appliance is installed

A single burn rate woodstove provides primary combustion air and secondary combustion air to a combustion chamber of the woodstove. The woodstove includes a primary air inlet, a primary air outlet into the combustion chamber, and a secondary air outlet into the combustion chamber. Some embodiments of the inventions include secondary air inlet(s) for the secondary combustion air separate from the primary air inlet. Some embodiments of the invention include the same firebox sizes as known in the prior art while providing such inexpensive single burn rate woodstoves with improved emissions performance by using both primary and secondary combustion air.

A furnace using biomass pellets as fuel, comprising a housing arranged on a base, wherein the housing is internally provided with a burning chamber, the bottom of which is provided with a burning grate, and the burning chamber is connected with a primary oxygen supply device; the primary oxygen supply device comprises an oxygen supply cylinder that communicates with the outside, and the bottom end of the oxygen supply cylinder is connected with an oxygen supply pipe II configured to blow air over the burning grate, and a plurality of air outlet holes I is defined in the oxygen supply cylinder.

A furnace using biomass pellets as fuel, comprising a housing arranged on a base, wherein the housing is internally provided with a burning chamber, the bottom of which is provided with a burning grate, and the burning chamber is connected with a primary oxygen supply device; the primary oxygen supply device comprises an oxygen supply cylinder that communicates with the outside, and the bottom end of the oxygen supply cylinder is connected with an oxygen supply pipe II configured to blow air over the burning grate, and a plurality of air outlet holes I is defined in the oxygen supply cylinder.