Sigma Thermal is based in Marietta, Georgia, and designs, engineers, supplies, and services process heating systems. The company serves multiple industries including gas processing, petrochemical, power generation, aerospace, and several others including agriculture. The company’s product lines include waste heat recovery, thermal fluid systems, biomass energy systems, electric process heaters, and various automation solutions. The company also provides aftermarket support including maintenance, retrofitting, upgrades, OEM replacement, and repairs to extend the operational life of components, machines, and systems.

Wood biomass boilers are said to have lower fuel costs than fossil fuel boilers. Fuel can be procured from forestry, manufacturing (wood processing), construction (mainly general house construction), and industrial waste disposal industries. To maintain the low fuel cost, a cooperative effort from many sectors of the public and private sectors is necessary in order to seek a stable supply of both mass and fuel.

Although it is tempting to think that both methods contribute to an increase in so-called greenhouse gases, they are based on the idea of being "carbon neutral". This is because they efficiently obtain energy directly from within the biosphere, rather than from fossil fuels, thus closing the carbon cycle and not leading to an increase in carbon dioxide emissions. This is based on the idea of "carbon neutrality", which does not lead to an increase in CO.

Power Mechanical operates as both a supplier and a distributor of boilers and chillers since in Virginia. The company&#;s product rental portfolio includes boilers, portable chillers, cooling towers, heat exchangers, and related accessories. They also sell new and used boilers and these products are supplied or rented out to a diverse customer base. For optimal performance and high efficiency, the company manufactures boiler efficiency products such as condensing and non-condensing economizers and Boiler tube scale prevention items. For clean fuel conversion, there are oil-to-natural gas burner retrofit kits and similar articles.

Firewood is wood that has been cut from logs into manageable sizes and dried to increase combustion efficiency. Wood chips are shredded wood offcuts from the forestry, manufacturing, and construction industries, and are easier to transport than firewood. Wood pellets are made from wood chips, sawdust, etc., which are formed into small pieces and processed for easy combustion. The price varies depending on the number of man-hours involved in the processing. The design of the equipment is determined by the fuel to be procured and the amount of steam and heat to be generated.