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

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.

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.

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.

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.

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.

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.