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Ask the Experts:
Commercial HVACR

You're viewing our online Q&As related to Commercial HVACR. Other technical categories include Residential HVACR and General HVACR. You can also browse our complete list of technical Q&As, and ask a question of your own.

Q&As Related to Commercial HVACR

CT Formula a N Mystery
Calculating cavity temperature (CT) values. Read it. Members Only

Using the N-5 AE Speedsheet
Solving a frequent issue with the ACCA Manual N speedsheet. Read it. Members Only

Using Manual N Abridged Edition
ACCA's Manual N 5th edition includes an "abridged edition" procedure that can only be used under certain circumstances. Read it. Members Only

Fresh air make up
Installation requirements for fresh air dampers on commercial buildings are a local issue. Read it. Members Only

CFM Levels and Installations
Applying correct level of CFM's when installing equipment. Read it. Members Only

TXVs for Different Systems
Low- and medium-temperature systems have different TXV requirements from A/C and heat pump applications. Read it. Members Only

Crankcase Pressure Regulators
In the HVAC business, CPR doesn't mean cardio-pulmonary resuscitation. Read it. Members Only

Evaporator Pressure Regulators
EPRs are particularly valuable in refrigeration and in multiple-evaporator systems. Read it. Members Only

Refrigerant Leaks
Refrigerant leaks must be fixed, but EPA rules allow some time to come up with a solution. Read it. Members Only

Using a Sight Glass to Check Charging
Sight glasses on TXV-equipment are useful, but there are other things the technician must do to ensure proper charging. Read it. Members Only

Customer-Installed Systems
EPA rules allow customers to buy and install HVAC equipment themselves. Read it. Members Only

You're viewing our online Q&As related to Commercial HVACR. Other technical categories include Residential HVACR and General HVACR. You can also browse our complete list of technical Q&As, and ask a question of your own.