Become a HVAC Professional - Part 1/3- Fundamentals & Basics

Explore the applications of air conditioning across residential and commercial settings, hospitals, malls, and offices, plus industrial uses in textile machinery and food processing.

Explore four international hvac standards bodies—Ashrae, Smacna, Cibse—and Carrier air conditioning—highlighting their design, installation, and publication guidelines for hvac systems.

Compare sensible heat and latent heat in the context of water heating, showing how sensible heat raises temperature while latent heat drives phase change without temperature increase.

Explore the six properties of air in HVAC fundamentals, including relative humidity, dew point, and humidity ratio, with brief explanations of each property in upcoming videos.

Dry bulb temperature is the normal temperature measured with a standard thermometer and represents the air's sensible heat, also called travel temperature, expressed in Celsius, Fahrenheit, or Kelvin.

Measure wet-bulb temperature with a wick-wrapped bulb in a vertical wet-bulb thermometer, then compare to dry-bulb; evaporation cools the wet bulb, yielding a lower reading.

Define relative humidity as the percentage of moisture in the air, the ratio of actual water vapor to the air's maximum capacity, with examples from desert, coastal, and rain conditions.

Learn about dew point temperature, the temperature at which water leaves the air and condenses on surfaces, illustrated by droplets on a glass.

Explore the humidity ratio, the fifth property of air, defined as the mass of water vapor in a unit of dry air, and its representation in English and metric units.

Define enthalpy as the sum of internal energy and the pressure–volume product, representing the heat content of a system.

Explore how to read the psychometric chart for air properties, including dry bulb temperature, relative humidity, humidity ratio, and dew point, with a practical example.

Learn the four major components of an air conditioning system—compressor, condenser (heating coil), expansion valve, and evaporator (cooling coil)—and how refrigerant flows through copper pipes between indoor and outdoor units.

Classify air conditioning systems into direct expansion and chilled water systems; refrigerant directly cools air in dx, while water removes heat in the chilled water setup.

Learn how window air conditioning works, with four main components—evaporator, condenser, compressor, and expansion valve—and its advantages of low cost and compact size, plus lack of ventilation and aesthetic concerns.

Discover split air conditioning systems, with indoor unit (fan coil unit) and outdoor unit, where refrigerant cools air via evaporator and condenser, noting copper pipe length up to 30 feet.

Chillers remove heat from water via a vapor compression cycle. It uses one or more compressors, a condenser, and expansion valve to move heat to heat exchangers or cooling coils.

Explain the advantages of chilled water air conditioning, including easier pumping of water through buildings, lower cost than refrigerant-based systems, and suitability for high-rise applications.

classify ducts by shape, differentiating square/rectangular from circular ducts, with emphasis on cross-sections, diffusers, and air terminal components used to deliver air.

Classify air types in HVAC systems by supply, return, and fresh air, and explain ventilation, exhaust air, and exhaust ducts used in kitchens and toilets.

Introduce fittings and accessories in HVAC basics, explaining how accessories control airflow volume while fittings change flow direction, including a 45-degree bend.

Explore hvac accessories that regulate flow. Volume control dampers balance ducts of rectangular and circular shapes, butterfly dampers control flow, and fire dampers isolate rooms during a fire.

Learn primary piping, copper refrigerant paths inside the chiller from compressor through condenser, expansion, and evaporator, and secondary piping supplying chilled water to the air handling unit.

Explore the arrangement of chilled water pipes from the chiller to the air handling unit, with two possible interconnection layouts and practical examples for a single unit.

Explore direct return systems for chilled-water distribution in an HVAC setup, including supply and return paths, hydraulic balance concepts, and comparisons with two-pipe and other arrangements.

Learn how a two-pipe reverse return system differs from a direct system, how water is supplied and returned, and how the system remains hydraulically balanced in a chilled water setup.

Categorize hvac pipes into three classifications by manufacturer, by schedules, and by location, and preview how these classifications guide system design.

Classify pipes by manufacturing into seamless and welded types, where seamless are continuous and welded are joined by welding, used in hvac refrigerant lines, chilled water, plumbing, and firefighting.

Learn the classification of pipes by schedules, including light, medium, and heavy duty (class B and C), with emphasis on schedule 40 and notes on schedule 45 and 14.

Explain how hvac piping is classified by location, detailing riser pipes (vertical), floor pipes (horizontal inside floors), and roof pipes (outdoor roof), including recommended velocities and pipe diameters.