One of the most common myths about nodules is the diagnosis itself! Usually doctorâs donât have the necessary equipment (stroboscopy) to diagnose vocal problems. So all problems are called nodules. Every singer has a colleague who had ânodulesâ for this reason.
Glossary of HVAC terms. HVAC (heating, ventilation, and air conditioning) is a major subdiscipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency.
In a heat pump or furnace, the BTU number refers to the heat output of the particular unit. The higher the number the more heat the unit can produce. Air conditioners are a little different. The BTU number on cooling equipment refers to the amount of energy used to remove the heat from the air.