What is main by TMBH in HVAC?

In HVAC (Heating, Ventilation, and Air Conditioning), "main" by TMBH typically refers to the main distribution duct or piping system that carries conditioned air or fluids throughout a building. TMBH stands for "The Mechanical Brothers Heating," a company that may provide HVAC solutions or products. The main system is crucial for ensuring efficient heating, cooling, and ventilation across different spaces within a structure. Properly designed main systems help maintain optimal indoor air quality and comfort.