BPI

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NEAT

National Energy Audit Tool

Superheat

Heat added to the evaporating vapor to ensure that no liquid enters the compressor

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

CFM50 Per Square Foot

Flow rate at 50P divided by the total square footage

TESP

The sum of the absolute values of the supply and return static pressures

A-Coil

Evaporator section of the cooling system - Consists of two coils shaped like the letter "A"

Furnace fan-on temperature

120-140F

Heat Rise

Supply Temp minus Return Temp

Furnace fan-off temperature

95-105F

Ammeter

A meter that measures the flow of electrical current in amperes

Heat Exchanger

A device that transfers heat from one substance to another

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

EEBA

Energy Efficient Builders Association

Sacrificial Anode

Metallic anode which is meant to be dissolved to protect other metallic components

R-Value

Measure of K value of a specific material (K is a measure of heat conduction)

LSW

Lead Safe Weatherization

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

Gores

Segment of a three-dimensinal shape fabricated from a two-dimensional material (the parts of a duct elbow)

Blower Wheel

Squirrel cage wheel whose purpose is to move the air through the room

NFRC

National Fenestration Rating Council

Low-E

E=emissivity refers to building materials designed to reduce heat transfer through thermal conductivity

Jalousie Window

Window which consists of parrallel glass louvers set in a frame

Weep Holes

Small holes in the bottom of a window assembly that allow for water to escape

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

Fenestration

The arrangement of windows and doors

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.

Backer Rod

Usuallly an extruded foam rod placed into voids to insulate and allow a backing for application sealant

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

Pascal

Unit of pressure measurement defined as one newton per square meter

Base Load

Water heating, lighting, refrigeration and any other year-round energy use

ICC

International Construction Code

AFUE

Annual Fuel Utilization Efficiency

pocket door cavity

Where pocket cavities extend to exterior walls, shove strips of fiberglass into the door opening with a broom handle shallow enough so that door can close

Stack Effect

The movement of air into and out of a building due to indoor/outdoor air density differences and natural bouyency

Vent Connector

Connects appliances venting outlet with the chimney

AGA

American Gas Association

Radiation

Continuous and unequal exchange of heat

18.5

N Factor for Missouri-one story house

Latent Heat

Energy given off when matter changes state

Energy Factor

Total energy delivered over total energy purchased expressed as a percentage

SIR

Savings to Investment Ratio

Type-L vent connector

Stainless-steel inner pipe and galvanized or black steel outer pipe

IFGC

International Fuel Gas Code

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

AFUE

Annual Fuel Utilization Efficiency

FLA

Full Load Amp

Gas Sniffer

Electronic Combustable Gas Detector

Cold water dip tube

a plastic tube below the cold port of a water heater-carries cold water to the bottom of the tank & keeps it separated from the already-heated water at the top of the tank.

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

FSK

Foil Scrim Kraft - foil faced batt insulation

Type-B vent

Consists of galvonized steel outer pipe and aluminum inner pipe

NFPA

National Fire Protection Association

Optimal refrigerator temperature range

35-40 degrees F

Optimal freezer temp

-5 degrees F

Sensible Heat

Heat that causes a change in temperature

Solenoid

A loop of wire wrapped around a metal core which produces a magnetic field when electricity runs through it (usually used in switches)

Manometer

Instrument used to check air pressure

PMI

Per Manufacturer's Instructions

Rises

Natural gas does what from a leak

CH4 + O2 =

C02 + H2O + CO + O2

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

MHEA

Mobile Home Energy Audit

DNR/EC

Department of Natural Resources Energy Center

LIHEAP

Low Income Home Energy Assistance Program

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

Dormer

A vertical window projecting from a roof

Drainage Plane

A space that allows water storage and drainage in a wall cavity

Enthalpy

The internal heat of a material measured in BTU's per pound

Exfiltration

Air flowing out of a residence from its conditioned space through the shell

Fin Comb

A comb-like tool used to straighten bent fins in an air conditioner

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

Gable

The triangular section of an end wall formed by the pitch of the roof

Insolation

the amount of solar radiation striking a surface

Make-Up Air

Air supplied to a space to replace exhausted air

Manifold

A section of pipe with multiple openings

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

Purlins

Framing members that sit on top of rafters, perpendicular to them, designed to spread support to roofing materials

Radon

A radioactive gas that decomposes into radioactive particles

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

Sequencer

A bimetal switch that turns on the elements of an electric furnice in sequence

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 rato of solar heat gain through a window to incident solar heat. Includes both transmitted heat and absorbed and reradiated heat.

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