Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Equipment Sizing Module (hvacpy.equipment) — ASHRAE HSE 2020
SplitSystem — residential and light-commercial split system sizing
PackagedRTU — packaged rooftop unit with economiser and gas heat options
FanCoilUnit — fan coil unit with chilled water flow rate calculation
Chiller — air-cooled and water-cooled chiller with N+1 redundancy
AirSourceHeatPump — dual-mode sizing with COP correction curves and supplemental heat
DuctSizer — three methods: equal friction, velocity reduction, static regain (ASHRAE HOF 2021 Ch.21)
VentilationCheck — ASHRAE 62.1-2022 Table 6-1 single-zone compliance check
supply_airflow_cooling, supply_airflow_heating, airflow_from_cooling_load pure functions
size_cooling_equipment, size_heat_pump convenience functions
EquipmentSizingError, AirflowCalculationError, DuctSizingError exceptions
65 new tests (185 total), 92% coverage on equipment module

scipy (already a dependency) is now actively used in _duct.py for Colebrook-White and static regain root-finding

Heat Load Calculations — ASHRAE CLTD/CLF cooling load method (1997 HOF Ch.28)
Heating Loads — ASHRAE steady-state heat loss method (2021 HOF Ch.18)
CoolingLoad — 24-hour peak cooling load with component breakdown
HeatingLoad — steady-state heating for equipment sizing
Room and Zone dataclasses for space modelling
WallComponent, WindowComponent, InternalGain data containers
Orientation enum (N, NE, E, SE, S, SW, W, NW, Horizontal)
CLTD Group D lookup table (24h × 9 orientations) with group multipliers A–G
CLF solar gain table with linear interpolation
Design conditions database for 10 cities worldwide
LoadCalculationError and DesignConditionsNotFoundError exceptions
scipy>=1.10 dependency (for future infiltration crack method)
56 new tests (120 total), 97% coverage on loads module

Psychrometrics Module — ASHRAE HOF 2021 moist air calculations
AirState — compute all psychrometric properties from any two known values
AirProcess — model mixing, heating, cooling, humidification processes
PsychChart — matplotlib psychrometric chart plotting
Convenience functions: dry_bulb_from_wet_bulb, humidity_ratio_from_rh, dew_point_from_humidity_ratio

Assembly Module — layered building envelope U-value/R-value calculations
Materials Database — 15+ common construction materials with thermal properties
Assembly class with add_layer(), u_value, r_value, breakdown()
Material and MaterialsDB classes
Unit system (Q_, ureg) powered by pint
64 unit tests