Michigan Mechanical Code – Definitions/Q’s
and A’s (Definitions from Michigan
Mechanical Code)
Abrasive Materials - -Moderately abrasive particulate in high concentrations,
and highly abrasive particulate in moderate and high concentrations, such as
alumina, bauxite, iron silicate, sand and slag.
- Absorption System - -A refrigerating system in which refrigerant is
pressurized by pumping a chemical solution of refrigerant in absorbent, and
then separated by the addition of heat in a generator, condensed (to reject
heat), expanded, evaporated (to provide refrigeration), and reabsorbed in an
absorber to repeat the cycle; the system may be single or multiple effect,
the latter using multiple stages or internally cascaded use of heat to improve
efficiency.
- Access (to) - -That which enables a device, appliance or equipment to be
reached by ready access or by a means that first requires the removal or
movement of a panel, door or similar obstruction.
- Air - -All air supplied to mechanical equipment and appliances for
combustion, ventilation, cooling or similar purposes. Standard air is air at
standard temperature and pressure, namely, 70F and 29.92 inches of
mercury.
- Air Conditioning - -The treatment of air so as to control simultaneously the
temperature, humidity, cleanness and distribution of the air to meet the
requirements of a conditioned space.
- Air-Conditioning System - -A system that consists of heat exchangers,
blowers, filters, supply, exhaust and return-air systems, and shall include any
apparatus installed in connection therewith.
- Air Dispersion System - -Any diffuser system designed to both convey air
within a room, space or area and diffuse air into that space while operating
under positive pressure. Systems are commonly constructed of, but not
limited to, fabric or plastic film.
- Air Distribution System - -Any system of ducts, plenums and air handling
equipment that circulates air within a space or spaces and includes systems
made up or one or more air-handling units.
- Air, exhaust - -Air being removed from any space or piece of equipment
and conveyed directly to the atmosphere by means of openings or ducts.
, - Air-Handling Unit - -A blower or fan used for the purpose of distributing
supply air to a room, space or area.
- Air, Makeup - -Any combination of outdoor and transfer air intended to
replace exhaust air and exfiltration
- Air, Transfer - -Air moved from one indoor space to another.
- [A] Alteration - -A change in a mechanical system that involves an
extension, addition or change to the arrangement, type or purpose of the
original installation.
- Appliance - -A device or apparatus that is manufactured and designed to
utilize energy and for which this code provides specific requirements.
- Appliance, Existing - -Any appliance regulated by this code which was
legally installed prior to the effective date of this code, or for which a permit
to install has been issued.
- High-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature greater than 2,000 F (1093 C).
- Low-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature of 1,000 F (538 C) or less.
- Medium-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature of more than 1,000 F (538 C), but
not greater than 2,000 F (1093 C).
- Appliance, Vented - -An appliance designed and installed in such a manner
that all of the products of combustion are conveyed directly from the
appliance to the outdoor atmosphere through an approved chimney or vent
system.
- [A] Approved - -Acceptable to the code official.
- [A] Approved Agency - -An established and recognized agency that is
regularly engaged in conducting tests or furnishing inspection services where
such agency has been approved by the code official.
- Automatic Boiler - -Any class of boiler that is equipped with the controls
and limit devices specified in chapter 10.
and A’s (Definitions from Michigan
Mechanical Code)
Abrasive Materials - -Moderately abrasive particulate in high concentrations,
and highly abrasive particulate in moderate and high concentrations, such as
alumina, bauxite, iron silicate, sand and slag.
- Absorption System - -A refrigerating system in which refrigerant is
pressurized by pumping a chemical solution of refrigerant in absorbent, and
then separated by the addition of heat in a generator, condensed (to reject
heat), expanded, evaporated (to provide refrigeration), and reabsorbed in an
absorber to repeat the cycle; the system may be single or multiple effect,
the latter using multiple stages or internally cascaded use of heat to improve
efficiency.
- Access (to) - -That which enables a device, appliance or equipment to be
reached by ready access or by a means that first requires the removal or
movement of a panel, door or similar obstruction.
- Air - -All air supplied to mechanical equipment and appliances for
combustion, ventilation, cooling or similar purposes. Standard air is air at
standard temperature and pressure, namely, 70F and 29.92 inches of
mercury.
- Air Conditioning - -The treatment of air so as to control simultaneously the
temperature, humidity, cleanness and distribution of the air to meet the
requirements of a conditioned space.
- Air-Conditioning System - -A system that consists of heat exchangers,
blowers, filters, supply, exhaust and return-air systems, and shall include any
apparatus installed in connection therewith.
- Air Dispersion System - -Any diffuser system designed to both convey air
within a room, space or area and diffuse air into that space while operating
under positive pressure. Systems are commonly constructed of, but not
limited to, fabric or plastic film.
- Air Distribution System - -Any system of ducts, plenums and air handling
equipment that circulates air within a space or spaces and includes systems
made up or one or more air-handling units.
- Air, exhaust - -Air being removed from any space or piece of equipment
and conveyed directly to the atmosphere by means of openings or ducts.
, - Air-Handling Unit - -A blower or fan used for the purpose of distributing
supply air to a room, space or area.
- Air, Makeup - -Any combination of outdoor and transfer air intended to
replace exhaust air and exfiltration
- Air, Transfer - -Air moved from one indoor space to another.
- [A] Alteration - -A change in a mechanical system that involves an
extension, addition or change to the arrangement, type or purpose of the
original installation.
- Appliance - -A device or apparatus that is manufactured and designed to
utilize energy and for which this code provides specific requirements.
- Appliance, Existing - -Any appliance regulated by this code which was
legally installed prior to the effective date of this code, or for which a permit
to install has been issued.
- High-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature greater than 2,000 F (1093 C).
- Low-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature of 1,000 F (538 C) or less.
- Medium-heat appliance (Appliance Type) - -Any appliance in which the
products of combustion at the point of entrance to the flue under normal
operating conditions have a temperature of more than 1,000 F (538 C), but
not greater than 2,000 F (1093 C).
- Appliance, Vented - -An appliance designed and installed in such a manner
that all of the products of combustion are conveyed directly from the
appliance to the outdoor atmosphere through an approved chimney or vent
system.
- [A] Approved - -Acceptable to the code official.
- [A] Approved Agency - -An established and recognized agency that is
regularly engaged in conducting tests or furnishing inspection services where
such agency has been approved by the code official.
- Automatic Boiler - -Any class of boiler that is equipped with the controls
and limit devices specified in chapter 10.
