Evaporator Coil

This is where refrigerant evaporates as it removes heat from the air that is passed over it. The evaporator coil is located in the indoor unit and is also referred to as the indoor coil.  Part of a split system air conditioner or heat pump located indoors. The evaporator coil cools and dehumidifies the air by converting liquid refrigerant into a gas, which absorbs the heat from the air. The warmest refrigerant is then carried through a tube to the outdoor unit.

Excellent

Gauge of condition as in like new or exceptional condition given its age and function, showing negligible or no sign of wear and/or usage.

Exfiltration

Air leakage outward through cracks and interstices and through ceilings, floors, and walls of a space or building.

Exhaust Air

Air removed from a space and not reused therein.

Exhaust Ventilation

Ventilation is intended to remove moisture and odors. The home ventilation institute (hvi) sets guidelines of eight air exchanges per hour (ach) for bathrooms. Proper ach ensures moisture is removed from this area without causing structural deterioration.

Exposed Nail Method

Application of roll roofing in which all nails are driven into cemented, overlapping course of roofing. Nails are exposed to the weather.

Exposure

That portion of the roofing exposed to the weather after installation.

Extension Cord Wiring

Electrical cord designed for temporary use installed as a permanent electrical wire.

Exterior Air Barriers

Exterior air barriers are products that keep infiltration of exterior unconditioned air from entering the building. These products are impermeable to airflow, but permeable to moisture flow. Moisture travels through them to increase the drying potential of the building's shell, but air does not pass through it. Foam boards also serve the same purpose, but all joints must be taped.

Exterior Finish

The outside finish of a structure that includes roof and wall covering, gutters and or window frames any protective outer cover.

Exterior Fixture

An outside item, e.g., areaway, canopy, marquee, platform, loading dock, that is permanently attached to and part of the building structure.

Exterior Grade Plywood

Type of plywood approved by the American Plywood Association for exterior use.

Exterior Sheathing

Exterior sheathing is applied to the exterior of the wall before the exterior finish is attached. Exterior sheathing can be blackjack, plywood, orient stranded board (osb) or any of the foam (extruded or expanded polystyrene, polyurethane, or styrofoam) boards available on the market. Foam boards achieve higher r-values in the wall section

Exterior Stop

The removable glazing bead that holds the glass or panel in place when it is on the exterior side of the light or panel, in contrast to an interior stop located on the interior side of the glass.

Exterior Wall

An outer wall, except a common wall that serves as a vertical enclosure of a building.

Exterior Wall Insulation

Exterior wall insulation comes as fiberglass or rock wool batts. Another popular option is blowing fiberglass, cellulose or spray foams into wall cavities. These products are denser than batts and slow the flow of heat and air infiltration. Remember, the higher the R- Value the greater the insulation efficiency.

External Fan Pressurization

A blower door is fitted to a building, induced airflow through the fan creates an artificial, uniform static pressure within the building. Internal and external pressure taps are made and a manometer is used to measure the airflow required to produce a given pressure difference. The higher the flow rate required to produce a given pressure difference the less airtight the building.

Extract Air

Air that is removed from a building or space. A proportion is often used for recirculation and added to incoming air. Alternatively it is all exhausted to the outdoors, sometimes via an air-to-air heat exchanger or a heat pump.

Extract Ventilation

A mechanical ventilation system in which air is extracted from a space or spaces, so creating an internal negative pressure. Supply air is drawn through adventitious or intentional openings. Such a system allows heat to be recovered, using an exhaust air heat pump.

Extrusion

The process of producing vinyl or aluminum shapes by forcing heated material through an orifice in a die. Also, any item made by this process.

Eyebrow Windows

Low, inward-opening windows with a bottom-hinged sash. These attic windows built into the top molding of the house are sometimes called "lie-on-your-stomach" or "slave" windows. Often found on Greek Revival and Italianate houses.

Façade

The principal, exterior face of a structure usually the front face or front elevation of a building.

Face

The most important side of a structure the front or facade. The exposed surface of an object, such as the earth, structure, wall, panel.

Face Brick

A better grade of brick used for an exterior wall of a building, often only on the face.

Face Nail

To nail into the face of a piece of wood or other building material.

Face Plate

The exterior surface around an opening, corner or edging.

Face Wall

A wall, usually of masonry, that has an exterior face of a different material the two materials are bonded so that they serve as a single load-bearing unit.

Fahrenheit

The temperature scale on which water freezes at 32 degrees and boils at 212 degrees designated by the letter F. To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit number, multiply by 5 and divide by 9 (77 -32 equals 45, times 5 equals 225, divided by 9 equals 25 degrees Celsius).

Fahrenheit Scale

On a Fahrenheit thermometer, under standard atmospheric pressure, boiling point of water is 212 deg. And freezing point is 32 deg. Above zero on its scale.