Heat Loss Heat Gain Flashcards
At the outside winter design temperature required heating equipment shall be capable of maintaining an indoor air temperature of what
72f (22c) in living spaces
How many btu’s dose a person give off
250 btuh per person
How many btu’s dose a kitchen give off
1600 btuh
How many btu’s dose a laundry room give of
1200 btuh but it’s not considered if it is located in the basement
A higher RH (relative humidity) percentage will cause you to feel what
Warmer
At 72F (22C) what will your RH percentage be
55%
Garage are always considered what
Unheated space
What are two things that can cause system lose
• duct running threw and unconditioned space
• ventilation air ( fresh air and exhaust)
What is the causes the greatest heat loss in a house
Windows and doors
People produce heat along with moisture with increase humidity carbon dioxide and indoor pollutants what is add to reduce this
A ventilation system
Air pressure flows from an area of higher pressure to an area of lower pressure the creates
A low pressure within the building envelope the higher pressure air on the exterior of a building envelope will flow inward threw cracks and holes
Building environments are effected by four things what are they
Occupants, appliances, mechanical systems, and building envelope
The building envelope is what
What separates the interior of the building from the outdoor environment
1 KW equals how many btu’s
3412 btu’s
1 watt equals how many btu’s
3.4 btu’s
The purpose of an air conditioning system is to provide what
High levels of comfort to the home owner
What are the six principles of comfort
Temperature, humidity, ventilation, filtration, circulation, and noise
Heat loss is important for what reasons
To size your equipment properly because an undersized furnace can result in not keeping up with the heating load the space needs and a oversized furnace will result in poor temperature control and excessive operating costs
Heat is a form of energy that flows between two bodies because
Due to there differences in temperature
How dose the transfer of heat work
Hot to cold
