5.3088.3 Regional Climatic Considerations—Mid and High Rise

Topic:

Forced Air

Subtopic:

Special Considerations

Desired Outcome:

Regional climatic variables are taken into consideration

For supporting material, see Referenced Standards.

Multifamily Homes

	Title	Specification(s)	Objective(s)
	5.3088.3a Very cold	Individual rooms will remain at a pressure differential of no greater than +/-3 pascals with reference to the indoors Combustion inlets and outlets will be terminated above snow line and protected from snow cover Roof exhaust fans will be installed with roof curbs that meet or exceed the mechanical code requirements Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into heating, ventilation, and air conditioning ( HVAC HVAC Heating, ventilation, and air conditioning ) systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Refrigerant charge evaluation must be done using proper evaluation techniques (subcooling/superheat) depending on metering device in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5	Avoid moisture-related damage to the building Ensure occupant safety by properly venting combustion gasses Ensure proper exhaust air flow
	5.3088.3b Cold	Combustion inlets and outlets will be terminated above snow line and protected from snow cover Roof exhaust fans will be installed with roof curbs that meet or exceed the mechanical code requirements Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5. Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into HVAC HVAC Heating, ventilation, and air conditioning systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Refrigerant charge evaluation must be done using proper evaluation techniques (subcooling/superheat) depending on metering device in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5	Ensure occupant safety by properly venting combustion gasses Ensure proper exhaust air flow
	5.3088.3c Mixed humid	Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into HVAC HVAC Heating, ventilation, and air conditioning systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Refrigerant charge evaluation must be done using proper evaluation techniques (subcooling/superheat) depending on metering device in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Heating and cooling refrigerant lines will be insulated	Ensure proper equipment operation Prevent energy loss and condensation
	5.3088.3d Hot humid	Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into HVAC HVAC Heating, ventilation, and air conditioning systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Refrigerant charge evaluation must be done using proper evaluation techniques (subcooling/superheat) depending on metering device in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Heating and cooling refrigerant lines will be insulated	Ensure proper equipment operation Prevent energy loss and condensation
	5.3088.3e Marine	Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into HVAC HVAC Heating, ventilation, and air conditioning systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Air conditioning/heating coils that are to be installed outside will be selected to withstand corrosion	Ensure equipment durability Ensure system operates efficiently Avoid damage to the system
	5.3088.3f Hot dry	Proper refrigerant charge will be evaluated and documented according to ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Examples of acceptable procedures that may be performed include: Refrigerant will be weighed into HVAC HVAC Heating, ventilation, and air conditioning systems when outdoor temperatures do not facilitate accurate testing of system charge Verification of proper charge will be conducted when outdoor temperatures are suitable Refrigerant charge evaluation must be done using proper evaluation techniques (subcooling/superheat) depending on metering device in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 Heating and cooling refrigerant lines will be insulated	Ensure proper equipment operation Prevent energy loss