HVAC Engineering Standards Cross-Reference
Cross-reference connecting relevant HVAC standards, manuals, code provisions, and reference methods to the calculation methods implemented by HVACLogic.
Technical Scope Note: The references on this page identify standards, manuals, regulations, and calculation methods relevant to HVACLogic tools. A reference to a standard does not by itself indicate complete implementation, certification, endorsement, or legal compliance. Applicability and code requirements depend on the adopted edition and jurisdiction.
Energy Standard for Buildings Except Low-Rise Residential Buildings
Scope: Prescribes minimum energy-efficiency design criteria for commercial buildings, covering the building envelope, HVAC systems, and service water heating.
💡 Standards / Regulatory Context: An energy-efficiency standard whose legal applicability depends on adoption by the relevant jurisdiction or applicable building energy code.
Referenced Clauses & Calculation Methods
Defines unit conversion relationships and rating metrics (such as SEER2, HSPF2, EER2, and COP) referenced in equipment efficiency baselines.
Specifies duct air-leakage test criteria and thermal insulation R-value requirements for ducts located in unconditioned spaces.
Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
Scope: Defines methods for calculating continuous and intermittent mechanical outdoor air ventilation rates and local exhaust metrics for residential dwellings.
💡 Standards / Regulatory Context: A consensus residential ventilation standard widely referenced by model energy codes, green building programs, and local housing standards.
Referenced Clauses & Calculation Methods
Reference calculation corresponding to the continuous volumetric outdoor airflow rate based on conditioned floor area and default occupant count.
Identifies reference design airflow targets for kitchen exhaust (100 CFM intermittent / 25 CFM continuous) and bathroom exhaust (50 CFM intermittent / 20 CFM continuous).
Residential Load Calculation
Scope: An ANSI-recognized engineering procedure for calculating sensible and latent peak heating and cooling loads for residential dwellings.
💡 Standards / Regulatory Context: A residential load-calculation methodology recognized by model codes (such as IRC M1401.3 and IECC) where adopted by the local authority having jurisdiction.
Referenced Clauses & Calculation Methods
Calculates conductive heat transfer across building envelope components using 99% heating and 1% cooling design temperatures.
Calculates estimated heating and cooling loads resulting from air infiltration through the building envelope.
Residential Duct Systems Design
Scope: An engineering design methodology for residential duct systems, including available static pressure budgeting, effective length calculations, and duct sizing.
💡 Standards / Regulatory Context: An industry reference for residential duct design methodology, referenced by model building codes according to jurisdiction-specific adoptions.
Referenced Clauses & Calculation Methods
Determines design friction rate per 100 ft by accounting for component pressure losses and total equivalent length.
Accounts for pressure drop adjustments from duct compression and provides velocity guidelines for residential distribution branches.
Residential Equipment Selection
Scope: A residential equipment-selection procedure for matching heating and cooling equipment capacities to calculated peak loads.
💡 Standards / Regulatory Context: Provides selection limits and procedures to help select appropriately sized equipment based on manufacturer expanded performance data and design conditions.
Referenced Clauses & Calculation Methods
Provides guidelines for equipment capacity selection relative to calculated design loads to promote balanced comfort and dehumidification performance under stated operating conditions.
HVAC Duct Construction Standards - Metal and Flexible
Scope: Industry fabrication, gauge, reinforcement, and construction guidelines for metal and flexible duct systems.
💡 Standards / Regulatory Context: An industry reference standard for sheet metal fabrication, duct construction methods, and pressure-class classifications.
Referenced Clauses & Calculation Methods
Provides hydraulic diameter equivalencies for rectangular ducts (often recommended with aspect ratios W/H <= 4:1 where practical to minimize excess surface friction and material deflection) and structural pressure-class tables.
Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment
Scope: Establishes standardized laboratory rating conditions, test procedures, and calculation methods for unitary air-conditioners and air-source heat pumps.
💡 Standards / Regulatory Context: Performance-rating and test-method reference for applicable residential air-conditioning and heat-pump equipment.
Referenced Clauses & Calculation Methods
Defines standardized test points and calculation procedures used to determine seasonal rating metrics (SEER2 and HSPF2) across representative temperature bins.
National Recycling and Emission Reduction Program
Scope: Federal regulations governing technician certification, refrigerant recovery/recycling, leak-rate repair triggers, and safe handling of regulated refrigerants.
💡 Standards / Regulatory Context: Federal regulatory program governing technician certification, venting prohibitions, and refrigerant reclamation across stationary refrigeration and air conditioning systems.
Referenced Clauses & Calculation Methods
Specifies required recovery and evacuation procedures, complemented by standard field calculations for line-set charge trim adjustments and operating subcooling/superheat verification.
Control of Infectious Aerosols
Scope: Establishes requirements for reducing risk of airborne pathogen transmission in buildings, defining Equivalent Clean Airflow (ECA) rates and Infection Risk Management Mode (IRMM).
💡 Standards / Regulatory Context: A consensus-based engineering standard providing a framework for equivalent clean airflow and infection-risk management strategies, applicable where adopted or referenced by specific authorities or programs.
Referenced Clauses & Calculation Methods
Defines the method for calculating design equivalent clean airflow demand per person (ECA_p) and per unit floor area (ECA_a) during Infection Risk Management Mode (IRMM).