Wednesday, November 10, 2010

Some basics about matter and energy

Here are some things I have learned about matter and energy while attending college for hvac/r.

*Matter is a substance that takes up space and has a weight

*The density of a substance tells us its mass-to-volume relationship

*An example of fossil fuel is natural gas

*There are 746 watts of electrical power in 1 horsepower

*Gas molecules travel in a downward, upward, and sideways direction

*The only new energy we get is from the sun

*The law of conservation of energy states that Energy can neither be created nor destroyed but it can be converted from one form to another

*Work is equal to force x distance

*Matter can be either be a solid, liquid,or a gas.

Monday, November 8, 2010

Some Facts about window air conditoners

Some things you may not have known about window air conditioners....

  • Capacity of a typical window air conditioner is usually ranges from about 4000 btu/h (1/3 ton) to 24,000 btu/h (2 tons).
  • These window and wall units are made for easy installation and service.
  • The most common refrigerant used in window air conditioners is R-22.
  • Larger units the compressor is usually in the back of the unit making it so the unit has a tendency to fall out of the window so at least half of the unit should be extended into the room. (MANUFACTURES USUALLY PROVIDE A BRACE KIT TO FIX THIS POSSIBLE PROBLEM).
  • Keep your window air conditioner clean by keeping the coils and air filters clean.

Saturday, October 24, 2009

Refrigeration Trainer Units

Here is the front view of the refrigeration unit.

This picture was taken in 2007 in the HVAC/R class room that. I went to college in Washington State.

Here you can see the compressor on the right (the black shell) and the condenser on the left with a cage around the condenser fan.

Friday, October 16, 2009

Refrigeration Trainer Units

Here is a refrigeration unit at the HVAC/R class that I went to. These were "miniature" refrigeration units that the school provided for the students to practice/ learn about refrigeration on.

This is the back of the unit. We used to call them "refer units" (refrigeration units). In this photo you can see the main power box and the condenser (the black rectangle).

Saturday, September 26, 2009


Hello this blog is about everything HVAC/R ( heating ventilation air conditioning and refrigeration). With some pictures, videos, some general knowledge, and tips. Would love for anyone to post up their experiences, stories, and comments. Hope you enjoy this blog!