Quizlet

Term	Definition
NEAT	National Energy Audit Tool
Sling Psychrometer	Instrument used to measure water vapor content of the atmosphere
ALA	Approximate Leakage Area
ALA Square Inch	10% of air flow
Wet Bulb Temperature	Used to evaluate the humidity in the air
Plenum	A sealed chamber at the inlet or outlet of an air handler
Dry Bulb Temperature	The temperature of air measured by a thermometer freely exposed to the air
Heat Rise	Supply Temp minus Return Temp
CAZ	Combustion Appliance Zone
Air Barrier	Material that is continuous, sealed at the seams and impermeable to airflow
Thermal Boundary	A line or plane where insulation and air barriers exist in order to resist thermal transmission and air leakage throu or within a building shell
R-Value	Measure of K value of a specific material (K is a measure of heat conduction)
Flame Retention Burner	An oil burner designed to hold the flame near the nozzle surface
Efflorescence	White powdery deposit left by water that moves through masonry and leaves minerals from mortar or soild behind as it evaporates
Rise-Run Rate for vent connectors	1/4" rise over 1' run (Allows combustion gases to rise through the vent and prevent condensation from pooling & rusting the vent)
Primary Air Barrier	When there are two air barriers the most airtight is the primary air barrier
Heating Degree Days	Degrees when average temperature is below 65F ex: average temperature today is 50F=15HDD)
1 ton of cooling	12,000 BTUs/hour
Low-E	E=emissivity refers to building materials designed to reduce heat transfer through thermal conductivity
Therm	100,000 BTUs or roughly 100 cubic feet of natural gas
Rise-Run for extension ladder	1' run for every 4' rise
Dense Packing	Shoving cellulosic insulation in at a rate of 3.5-4lbs per cubic foot, usually done on exterior walls
Falls	What does propane gas do from a leak
ACH	Air Changes per Hour
Intermediate Zones	Unconditioned spaces that are sheltered within the exterior shell of the house
Latent Heat	Heat given off when matter changes state
Sensible Heat	heat that causes a change in temperature
Bypasses	Conduits for air travel within building cavities IE: porch overhangs
Balloon Framing	Long, continuous framing members that run from sill plate to eave line with intermediate floor structures nailed to them.
Convection	Heat tranferred from one place to another using a fluid
Conduction	Heat transfer within a substance or from one substance to another
Net free area	The actual amount of area in a vent that is not the material itself (metal grills and louvers have have 60-75% net free area, wodden ones only 20-25%)
How to fasten single wall vent pipe	3 screws or rivets
Base Load	Water heating, lighting, refrigeration and any other year-round energy use
AFUE	Annual Fuel Utilization Efficiency
Vent Connector	Connects appliances venting outlet with the chimney
Radiation	Continuous and unequal exchange of heat
Energy Factor	Total energy delivered over total energy purchased expressed as a percentage
SIR	Savings to Investment Ratio
BAS	Building Airflow Standard
IFGC confined space	A room containing 1 or more combustion appliances that has less than 50 cubic fee of volume for every 1000 BTU/H of appliance output
Power Venters	create a stable and negative draft, commonly used for sidewall venting
FLA	Full Load Amp
U-Value	Overall heat transfer coefficient-describes how well a building element conducts heat (smaller the value the better)
SSE	Steady State Efficiency-Efficiency of a furnace once it is up and running
TESP	Total Exterior Static Pressure
Optimal refrigerator temperature range	35-40 degrees F
Optimal freezer temp	-5 degrees F
Sensible Heat	Heat that causes a change in temperature
Manometer	Instrument used to check air pressure
PMI	Per Manufacturer's Instructions
Rises	Natural gas does what from a leak
2-4 years	Gas burner should be maintained every
IWC	Inches Water Column
Commissioning	the process of ensuring that systems are designed, installed, functionally tested, and capable of being operated and maintained to perform to design intent.
Atmospheric Chimney	Transports combustion gases using the flames' heat and gas' buoyancy
Draft Diverter	Also known as a "draft hood" helps vent combustion air away from hot water heaters
CH4	Natural Gas
MSDS	Material Safety Data Sheet
Blower door standard pressure	50 Pascals
Pressure Pan	Used to block registers and measure air pressure behind it
ASHRAE 62-1989	Standard for acceptable IAQ 15 CF/M or outdoor air per person or .35 air changes per hour
Sones	Units of perceived loudness
Hours per year	8760
Seasonal Energy Use	heating and cooling
ECM	Energy Concervation Measures
DWH	Domestic Water Heater
Dense Pack	Installation of Cellulose at density of 3.5-4.0 lbs/cubic foot
First law of thermodynamics	Energy is neither created nor destroyed, but merely moves from place to place and changes form.
Second law of thermodynamics	Heat moves from high temperature regions to low temperature regions-never the reverse
Enthalpy	The internal heat of a material measured in BTUs per pound
Backdrafting	Continuous spillage of combustion gases from a combustion appliance
Power	Energy divided by time
rh	relative humidity
Baffle	A plate or strip designed to retard or redirect the flow of flue gases
capillary action	The ability of water to move through materials, even upward against gravity through small tubes or spaces
capillary barrier	A material or air space designed to stop capillary acton from carrying water into a building
COP	Coefficient of Performance A heat pump or air conditioner's output in whatt-hours of heat moved divided by watt-hours of electrical input
Decatherm	one million BTU's or 10 therms
Desiccant	Liquid or solid material used to absorb water or water vapor
Drainage Plane	A space that allows water storage and drainage in a wall cavity
Exfiltration	Air flowing out of a residence from its conditioned space through the shell
Flashing	Waterproof matterial used to prevent leakage at intersections between the roof surface at wall penetrations
Footcandle	A measure of light intensity
Frost Line	the maximum depth of the soil where water will freeze during the coldest weather
Insolation	the amount of solar radiation striking a surface
Make-Up Air	Air supplied to a space to replace exhausted air
Mastic	A thick creamy stubstance used to seal seams and cracks in building materials
ODS	Oxygen Depletion Sensor
Oxygen Depletion Sensor	A safety device for unvented combustion heaters that shuts gas off when oxygen is depleted
Psychrometrics	The science of the relationship between air, water vapor, and heat
Resistance	The property of a material resisting the flow of electrical energy or heat energy
Sash	A movable or stationary part of a window that frames a pieces of glass
Scale	Dissolved minerals that precipitate inside boilers and storage tanks
Sealed-Combustion	A combustion appliance that draws combustion air from outdoors and has a sealed exhaust system
SEER	Seasonal Energy Efficiency Ratio
SC	Shading Coefficient
Shading Coefficient	A decimal describing how much solar energy is transmitted through a window, compared to a clear, single glass, which has an SC of 1.0
Sill	The bottom of a window or door frame
Soffit	The underside of a roof overhand or a small lowered ceiling
Solar Gain	Heat from the sun that is absorbed by a building and contributes to the need for cooling
SHGC	Solar Heat-Gain Coefficient
Solar Heat-Gain Coefficient	The ratio of solar heat gain through a window to incident solar heat. Includes both transmitted heat and absorbed and reradiated heat.
Solar Transmittance	The percent of total solar energy transmitted by a material
Specific Heat	The ratio of a material's heat storage capacity to the heat storage capacity of water
Spillage	Temporary flow of combustion gases from a dilution device
Split-system	An air conditioner that has the condenser and compressor outdoors and the evaporator indoors
Standing Losses	Losses from a hot water storage tank through its shell
Static Pressure	measurement of a pressure in a fluid filled chamber at a specific location
Steam Trap	An automatic valve that closes to trap steam in a radiator until it condenses
Strike Plate	The metal plate attached to the door jamb that latch inserts into.
Subcooling	The number of degrees Fahrenheit that a condenser and nearby piping cools the liquid refrigerant below its saturation temperature
Thermal Break	A piece of relatively low conducting material between two high conducting materials
Thermal Bridging	Rapid heat conduction resulting from direct contact between very thermally conductive materials like metal and glass
Vapor Diffusion	The flow of water vapor through a solid material
Visible Transmittance	The percent of visible light transmitted by a glass assembly
HERS	Home Energy Rating Systems
RESNET	Residential Energy Services Network
IECC	International Energy Concervation Code
Emittance	The ability of a material to emit radiant energy from its surface
Absorptance	The ratio of a solar energy absorbed to incident solar
Reflectance	The ability of a material's surface to reflect radiant heat. Also called reflectivity
Heating Balance Point	Where outdoor temperature is such that no indoor heating is needed
RH	Relative Humidity
Relative Humidity	Measures how saturated the air is with a percentage of water vapor.
Gusset	a metal plate used to strengthen a joist
Thermal Conductivity	How much heat in BTUs flows through a 1" thick by 1' square foot slab of that material per hour when there is a 1-degree-Fahrenheit temperature difference between the slab's two surfaces
Thermal Break	A piece of relatively low conducting material between two high conducting materials
Design Temperature	The temperature equaled or exceeded 97.5% of the time during the three coldest months: Dec, Jan & Feb
Q	heating loss (usually in BTU/hr)
Leeward Side	The side sheltered by the wind
MVG	Minimum Ventilation Guideline
MVR	Minimum Ventilatin Rate
HRV	Heat Recovery Ventilator
ERV	Energy Recovery Ventilator
Scissor Trusses	A roof truss in which the braces cross like scissors. Usually used for cathedral ceilings
W-W R	Whole-Wall R-Value
Whole-Wall R	The average R-value of a wall including framing materials
Clear-Wall R	The average R value of the cavity between framing members
XPS	Extruded Polystyrene
EIFS	Exterior Insulation and Finish Systems
Drainage Plane	A space that allows water storage and drainage in a wall cavity, adjacent to or part of the weather-resistant barrier.
Thermal Barrier	A sheeting material that protects the materials behind it from reaching a temperature of 250F during a fire.
Ignition Barrier	A material used with foam insulation to prevent the foam from igniting.
Fire Partition	A fire barrier that prevents the spread of fire between rooms on one level of a building.
Firewall	A structural fire barrier between buildings that is designed to remain intact and standing in, during and after a fire
rough opening	Structural framing around the window to which the window fram is attached
LBL	Lawrence Berkeley Laboratory
SHGC	Solar Heat Gain Coefficient
Solar Heat Gain Coefficient	The ratio of solar heat passing through the glass to solar heat falling on the glass at a 90 degree angle.
SC	Shading Coefficient
Shading Coefficient	Compares the solar transmittance of a glass assembly compared single-pane glass which has a SC of 1. Always less than 1
VT	Visible Transmittance
Visible Transmittance	Measures how much visible light is admitted by the window glass.
Casement Window	A window attached to it's frame with one or more hinges
Heating System	The heater and its distribution system
Circulator	A blower or pump for moving the heating fluid, air, water or steam
Flue	A passageway for venting combustion gases
Open-Combustion	Combustion chamber, heat exchanger, flues & chimney OPEN to surrounding air
Closed-Combustion	Combustion chamber, heat exchanger, flues & chimney CLOSED to surrounding air
Draft	The force that brings combustion air into the combustion chamber and propels the combustion gases out through the venting system.
Delivered Efficiency	The percentage of the fuel's potential energy that actually heats the living space.
Cycling Losses	The heat lost while warming up a furnace or boiler
High Limit Control	Bimetal element attached to a switch in the burner's control circuit. Extinguishes the burner in the event of overheating.
Thermocouple	Small Electric generator powered by heat from the pilot light or gas appliance. If the pilot light goes out, the current stops and the spring-loaded valve closes shutting off the gas.
Zoning	Dividing a home into parts or zones that are controlled by separate thermostats
COP	Coefficient Of Performance
Hydronic Heat Pump	Uses the refrigeration cycle to move heat from the earth or a body of water into the home through a hydronic distribution system
All-Fuel Chimney	Chimneys used as verticle chimneys for oil and solid-fuel appliances.
Vent Damper	Reduces the heat loss from a furnace or boiler by closing off the chimney when the burner isn't operating.
Lumens Per Watt	Lighting Efficiency or efficacy is measured by these units
footcandle	a lumen of light distributed over one square foot of area
CRI	Color Rendering Index
Rattler	Measures CO levels in ambient air
DG-700	Commonly used digital pressure and flow guage
WCD	Worst Case Draft
Smoke Pen	Handheld device that tests for spillage or air leaks
20-25 years	Expected life span of a furnace
Internal Gains	Waste heat from lighting, refrigeration etc. as well as people
evapotranspiration	The process by which a plant releases water vapor
Radiant Barrier	Foil sheet or coating designed to reflect heat rays or retards their emission
Evaporative Cooler	Device for cooling homes in dry climates that cools the incoming air by humidifying it.
SEER	Seasonal Energy Efficiency Ratio
Manual J	Method developed by the air conditioning Contractors of America to size heating and cooling equipment.
SHF	Sensible Heat Factor
Sensible Heat Factor	The moisture removal capacity of an air conditioner
Recovery Capacity	Gallons per hour a water heater can heat
Tankless Water Heater	heats water as it flows through the heater, eliminating the need for a storage tank
Heat Traps	Valves or loops of pipe that stop convection of hot water into the ht and cold water pipes ablove the storage water heater or external storage tank.
ETS	Environmental Tobacco Smoke
BTL	Building Tightness Limit
Conductance	The property of a material to conduct some energy form like heat or electricity
footing	The part of a foundation system that actually transfers the weight of the building to the ground
Fill Tube	A plastic or metal tube used for its stiffness to blow insulation inside a building cavity
Hydronic	An ambiguous term meaning either hot-water space heating or both hot water and steam space heating
Infrared	Pertaining to heat rays emitted by the sun or warm objects on earth
Jamb	The side or top piece of a window or door frame
Kinetic Energy	Energy in transition or motion
Plate	a piece of lumber installed horizontally to which the vertical studs in a wall frame are attached
Relamping	The replacement of an existing lamp with a lower wattage lamp
BPI	Building Performance Institute
Relay	An automatic, electrically-operated switch
Return Air	Air circulating back to the furnace from the house, to be heated by the furnace and supplied to the rooms.
Rim Joist	The outermost joist around the perimeter of the floor framing
Service Wires	the wires coming from the utility transformer to the service equipment of the building
Stop	A thin trim board for windows and doors to close or slide against
Substrate	A layer of material to which another layer is applied
Task Lighting	Lighting provided at the area where a visual task is performed
Thermodynamics	The study of work, heat and energy in a system
Threshold	The raised part of a floor underneath a door that acts as an air and dust seal
Truss	A lightweight, rigid framework designed to be stronger than a solid beam of the same weight
hygrometer	Instrument that measures relative humidity
Header	a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters
CB	Circuit Breaker
Circuit Breaker	Safety device which opens (breaks) an electric circuit automatically when it becomes overloaded
Laths	Narrow strips which support plastering
Stringer	A long horizontal timber in a structure supporting a floor
Stucco	A fine plaster used for interior decoration and fine work also used for rough outside wall coverings
Tread	The horizontal part of a step
Water Table	The finish at the bottom of a house that carries water away from the foundation
Fire Block	Blocks normally installed in balloon framed walls to slow down the spread of fire.
King Stud	The stud running from top to bottom plate on either side of a window or door.
Embodied Energy	The available energy that was used in the work of making a product
Air Change	The amount of air required to completely replace the air in a room or building.
Carbon Monoxide Poisoning	Carboxyhemogoblin Saturation
Supply	The ductwork that carries air from the air handler to the rooms in the house.
IAQ	Indoor Air Quality
sill plate	The first component of the framing, bolted to the foundation walls, supports the building while anchoring it to the foundation.
35 PPM	Carbon monoxide level limit for ambiant air per OSHA and BPI
BAS	Building Airflow Standard
Building Airflow Standard	BAS
60 seconds	How long before an appliance fails the spillage test
9 ppm	ASHRAE limit for 24-hour carbon monoxide exposure
R-7	Ventilation exhaust ductwork outside building shell must have insulation rated at:
R-14	Minimum insulation level for attic access openings
Asbestos	Blower door testing cannot be performed if ______ could become airborne
OSHA	Occupational Safety & Health Administration
400 cfm	One ton of cooling requires how much blower capacity
.23	U-Value of 2X4 wood stud
4.38	R-Value of a 2X4 wood stud
250	How many pascals in 1 IWC
magnehelic gauge	A sensitive differential pressure or vacuum gauge
Radon	You might pressurize a house if what is present?
energy recovery ventilator	A ventilator that recovers latent and sensible energy from the exhaust airstream and imparts it to the incoming airstream.
Add Humidity	What does ventilation do for a home during the winter?
Heating Seasonal Performance Factor	Rating for heat pumps describing how many BTUs they provide per watt-hour of electricity consumed
HSPF	Heating Seasonal Performance Factor
heat pump	Apparatus that extracts heat from a liquid that is at a higher temperature than its surroundings
NFPA	National Fire Protection Agency
Hydronic Heaters	Includes baseboard heaters (convectors) and radiant flooring that uses warm water as the heat source.
Stick Frame	Skeletal framing system using thin columns spaced closely together
Stem Wall	water-resistant wall built on top of a foundation and designed to lift vulnerable wall materials away from insects and water
Point Load	Load concentrated in a small area
Pier	Water-resistant column built on top of a foundation and designed to lift vulnerable materials away from insects and water.
BTU	The amount of energy needed to heat one pound of water one degree Fahrenheit
Dew Point	The temperature at which air can no longer hold more water
Material Safety Data Sheet	All chemicals & smoke pens brought on site need a:
disable or have it repaired	What should you do about the CO producing appliance before proceeding with additional diagnostics or inspections
combustion appliance safety inspection	CO test, draft measurement, spillage evaluation and worst case depressurization of CAS
inspect for leaks	In homes with natural gas or propane service, what test is needed
attic leakage	When considering air sealing a house, which part should you give the highest priority?
mechanical ventilation	What is the correct action if final CFM50 is LOWER than BAS and less than .7XBAS
1-2 feet from draft diverter	On a DHW unit, where should the test hole be drilled?
5 minutes	How long does it take to acheive Steady State Efficiency?
Intersitial	word relating to the space between walls in balloon framing where there can be convection currents.
35ppm	You turn off appliances and ventilate spaces if the ambiant CO levels are greater than:
100-300PPM	Level 1 action for oven: recommend CO detector & a service call should be taken if SSE CO levels are:
300PPM or more	Level 2 Action for oven: unit must be serviced and if no improvements, install an exhaust fan at 250 CFM if SSE CO levels are:
shows if they're connected	Why is a zone test helpful between an attached garage and a house?
flame flickers	What is the symptom of a cracked heat exchanger
air sealing	Attic insulation shall not be recommended until after what is performed?
zone testing	what test will show how much air leaks between the attic and the living space?
local codes	How are minimum insulation levels determined
GAMA	Gas Appliance Manufacturing Association
Calculating BAS (Building Airflow Standard)	1) Calculate BAS based on Volume, then 2) calculate based on Occupancy, then 3) Take the higher of the two standards
3 Forms of Heat Transfer	Convection, Conduction, Radiation
How Many BTUs in 1 kWh?	3412
How many BTUS in 1 Therm of Gas	100,000
Heat Load	Used to measure appliance capacity
Heat Loss	Total Seasonal Heat Loss
CFM50	CFMn*NC
NC	"N" Correction factor from LBL charts
Occupancy BAS	Required Airflow = 15 cfm * # of occupants
Volume BAS	.35 * Volume/60
CO >35 ppm	1) Disable appliance 2)Repair before proceeding
AFUE	Annual Fuel Utilization Efficiency
AFUE (Annual Fuel Utilization Efficiency)	Efficiency of unit in operation (with starts/stops) UNIT ONLY
Seasonal Efficiency	TOTAL system efficiency: AFUE PLUS distrib losses, average over course of heatin season
5 minutes	Length of time that a combustion appliance should run to achieve"Steady State Efficiency"
60 Seconds	Amount of permissible time after ignition that spillage is allowable from the flue.
Backdrafting	Continuous Spillage
"Draft Measurement" is done in both Category I and IV heating systems.	False
Category I includes natural draf and fan assisted draft	True
Category IV includes Sealed combustion and Fan Induced draft	False
Category IV includes "Power vented" and "sealed combustion"	True
Category I vents, under normal conditions, will have NEGATIVE draft pressure	True
Category IV vents, under normal conditions, will have POSITIVE pressure	True
What is the order of testing when a chimney is shared by mutiple appliances?	Smallest BTU input rating to highest
Draft heating should always be check for spillage at the base of the chimney liner or flue	True
Vent draft pressure should be measured before the appliance reaches steady state.	False
CAZ	Combustion Appliance Zone
Combustion	chemical reaction that involves the combination of a fuel with oxygen
3 Elements required for combustion	Fuel, Oxygen, Heat
Draft	Movement of combusion by-products through the flue and out of the building
Combustion by-products	Heat, Light, Nitrogen Oxides (NOx), Water/vapor, Carbon Dioxide, Carbon MONOxide
Carbon Monoxide	Colorless, odorless, tasteless and DEADLY-is the result of incomplete combustion
Methods to differentiate Heating Systems	Fuel type, Distribution type, Vent design and General Condition
Furnace	Used in forced hot air system
Boiler	Used in hydronic and steam systems
Distribution Types	Forced Air, Gravity, Hydronic, Steam

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• "Dense Packing" image
• "Net free area" image
• "Flashing" image
• "Sash" image
• "Scale" image
• "Sill" image
• "Soffit" image
• "Steam Trap" image
• "Strike Plate" image
• "Flue" image
• "Radiant Barrier" image
• "Evaporative Cooler" image
• "Tankless Water Heater" image
• "Laths" image

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