There is never a circumstance where it is wrong to ask a question. Sincere inquiry is how we learn and how we keep ourselves out of a great deal of trouble. If you are building a new home, remodeling or installing an HVAC system, you will be calling on your local HVAC provider. No doubt, [...]
We humans build structures for safety and living that also undergo heat transfer processes. The purpose of any shelter is to provide privacy, security, and protection from natural occurrences. The temperatures inside these structures are impacted by environmental conditions, construction materials, and the humans living in them. Heat must be released in these shelters for [...]
The NATE Organization The North American Technician Excellence organization is our countries largest certifying entity for the heating, ventilation, air conditioning and refrigeration industry. For 20 years, NATE has offered guidelines, continuing education, tests, and government influence making technicians better and the job they do easier. It’s headquarters is in Arlington, VA, but it’s influence [...]
Flared Fittings Flared tube fittings are used when a connection is needed in tubing. There are a variety of flared fittings on the market and the ones most often used in HVAC/R are forged. The size of the threads in these fittings will be determined by either National Fine(NF) or National Pipe(NP). They are made [...]
HVAC/R Tubing Flared Connections The most common connection used in connecting tubing to fittings is the flare connection. Flared connections are accomplished with a set of tools and lubricants, if needed. This type of connection is a compression fitting process usually done with soft steel, copper or aluminum. Flared connections are classified as a cold [...]
Tubing and Fittings in HVACR The copper tubing and fittings used in air conditioning and refrigeration are designed and processed for HVACR and are often charged with nitrogen. The nitrogen keeps the tubing clean and dry preventing the onset of oxidation/corrosion. This type of tubing is used for hot and cold water supplies and the refrigerant [...]
Evaporative Condensers Explained Evaporative condensers cool vapors that occur in the HVAC cycle. Involved in the process are a condenser, drier, receiver, expansion valve and an evaporator. Compressed refrigerant vapor is sent to the evaporative condenser to be cooled back into a liquid. Water is piped to a holding tank that uses a float [...]
Geothermal Systems that use water or the ground and the thermal heat attached to them are called geothermal heat systems. Essentially it is heat pulled from the ground or the various elements of the ground such as soil, rocks, and water. These kinds of systems are also named ground source heat pump systems. These systems [...]
Radiant Heat Transfer Radiant Heat Transfer is a concept within the domain of thermal engineering that is concerned with the creation, usage, conversion and exchange of thermal energy. What we know as “heat” is thermal energy and this energy is classified into mechanisms of thermal convection, thermal radiation, thermal conduction, and phase changes. Advection: This [...]
Gas Fired The “gas fired” part of this type of heating is very clear. This type of heating system burns fuel sources that are kept under constant low pressure. There is an installed pressure regulator that keeps the pressure at a constant. Hydronics The field of hydronics is an area that transfers heat through a [...]