ICC M1 flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Permit required

A permit must be obtained before installing, altering, replacing, or repairing a mechanical system; ordinary repairs that do not affect capacity or safety are exempt.

Concealed work inspection

Ducts, piping, vents, and other mechanical work that will be concealed must be inspected and approved by the code official before being covered.

Listed and labeled

Equipment or materials must be tested by an approved agency, included in a published list, and bear the agency's label; installation must follow the listing and manufacturer instructions.

Stop-work order

The code official may issue a written stop-work order for work done without a permit or contrary to the code; work must stop until the order is resolved.

Approved

A material, appliance, or method accepted by the code official as meeting the code, usually because it is listed, labeled, or otherwise shown to be suitable.

Occupiable space

An enclosed space intended for human occupancy, excluding spaces such as closets, storage rooms, parking garages, and crawl spaces that are not normally occupied.

Plenum

A space used for air distribution that is part of a heating, ventilating, or air-conditioning system; plenums have restrictions on combustible materials and stored items.

Combustion air

Air supplied to a fuel-burning appliance for combustion and draft; it must be provided from indoors, outdoors, or a combination in the required quantity.

Dwelling unit

A single housekeeping unit providing complete independent living facilities, including permanent provisions for living, sleeping, eating, cooking, and sanitation.

Garage ignition source

In a private garage, ignition sources of heating appliances must be elevated at least 18 inches above the floor unless the appliance is listed for installation at a lower height.

Clearance to combustibles

The minimum distance between heat-producing equipment and combustible material, as specified by the listing, label, or code; it may be reduced only with approved protection.

Natural ventilation openings

Natural ventilation requires operable openings to the outdoors with a minimum openable area of 4 percent of the floor area of the space being ventilated.

Mechanical ventilation rate

The minimum outdoor airflow for an occupancy is determined from code tables using occupant density and floor area, then supplied continuously during occupied periods.

Appliance service access

Heating appliances must be accessible for inspection, service, repair, and replacement; access openings and working space must allow removal of the largest component.

Primary condensate drain

A condensate drain from air-conditioning equipment must be at least 3/4 inch nominal size and slope at least 1/8 inch per foot toward an approved disposal point.

Secondary condensate pan

A secondary drain pan is required where condensate overflow could cause damage; it must be watertight, at least 1.5 inches deep, and drain to an approved location.

Condensate trap

A condensate trap prevents air from being drawn through the drain line; it must be installed per manufacturer instructions and have a depth sufficient to overcome the fan pressure.

Outdoor condenser clearance

Outdoor air-conditioning condensing units need clearance per the manufacturer's instructions so discharge air is not recirculated and service access is maintained.

Refrigerant piping protection

Refrigerant lines must be supported, protected from physical damage, and installed with approved fittings and insulation where required to prevent condensation or energy loss.

A1 refrigerant

A refrigerant classification indicating lower toxicity and no flame propagation; it is the least hazardous group under the standard safety classification.

Machinery room

A room used to house refrigeration equipment that must meet special construction, ventilation, detection, and access requirements when refrigerant quantities exceed code thresholds.

Refrigerant detector

A device installed in a machinery room or occupied space to sense refrigerant concentration and activate alarm or ventilation before the concentration becomes hazardous.

Relief device discharge

Pressure-relief devices on refrigeration systems must discharge to a safe outdoor location away from windows, doors, and air intakes, and must not discharge into the occupied space.

Duct sealing

Duct joints, seams, and connections must be sealed with approved materials to prevent air leakage; sealing must meet the required seal class for the system.

Return air prohibition

Return air cannot be taken from bathrooms, kitchens, garages, closets, mechanical rooms, or unconditioned attics because of contaminants, moisture, or fire risk.

Flexible duct installation

Flexible air ducts must be installed fully extended, supported per the manufacturer, and with bends not sharper than the listing allows to maintain airflow.

Fire damper

A listed device installed where a duct penetrates a fire-resistance-rated assembly to close automatically and prevent fire spread through the duct opening.

Duct support spacing

Horizontal metal ducts must be supported at intervals allowed by the duct construction standard, and supports must be independent of the duct joints and connections.

Chimney height rule

A chimney must extend at least 3 feet above the highest point where it passes through the roof and at least 2 feet above any building within 10 feet.

Combustion air openings

Confined spaces require two permanent openings, one within 12 inches of the top and one within 12 inches of the bottom, sized by the appliance input and air source.

Indoor combustion air

When combustion air comes from indoors through two openings, each opening must have at least 1 square inch of free area per 1,000 Btu/h input, with a minimum of 100 square inches.

Outdoor combustion air

When combustion air is taken directly from outdoors through two openings, each opening must have at least 1 square inch free area per 4,000 Btu/h total input.