The simple API to quantify human heat balance with one set of inputs in multiple validated models.
In order to access the API, you must first register for an API Key and then perform a GET request with the following structure:
Below is a table listing all accepted parameters by the API alongside their name and valid value structure. Here is an example API request url for the UTCI (Unversal Thermal Climate Index) model:
Note: provides additional info on the parameter.
|Gender||N/A||gender=||0 = male or 1 = female|
|Body Surface Area Equation||N/A||bsacalc=||duBois, mosteller|
|Basal Metabolic Rate||N/A||bmrmet=||rosa, harris, miflin, fixed|
|Acclimation status||N/A||acclim=||0 = no or 100 = yes|
|Days of heat acclimation||Days||dih=||number|
|Maximum Sweat Rate||g/h||SRmax=||number|
|Posture||N/A||posture=||0 = seat, 1 = crouch, 2 = stand|
|Intrinsic clothing insulation||clo||icl=||number|
|Evaporative clothing resistance||m²/K/W||recl=||number|
|Clothing Area Coverage||0-1.0||clo_saf=||number|
|Static clothing permeability index||0-1.0||imst=||number|
|Mean Radiant Temperature||°C||Trad=||number|
|Black Globe Temperature||°C||Tglobe=||number|
|Time of Day (UTC)||string||tod=||string|
|Modality||string||modality=||static, treadmill, static_cycle, free_run, or free_cycle|
SSTA: Steady-State Thermal Audit
The steady-state thermal audit (SSTA) conducts a heat balance assessment based on the parameters provided.
PHS: Predictive Heat Strain
The Predictive Heat Strain Model (PHS, ISO 7933:2004) is used to evaluate the thermal stress experienced by a subject in a hot environment. The model predicts the maximum allowable exposure times determined from the attainment of a core temperature exceeding 38.5C, or excessive sweating causing dehydration.
UTCI: Universal Thermal Climate Index
The Universal Thermal Climate Index (UTCI) is a simple assessment of the thermophysiological responses for a standard homiotherm using easily accessible meteorological data. The returning value, a UTCI Equivalent Temperature, can then be assessed against a normative scale to determine the relative heat/cold strain. The UTCI implementation uses the operational procedure as published in the International Journal of Biometeorology. UTCI development was supported by the European Commission via EU COST Action 730.
WBGT: Wet Bulb Globe Temperature
Wet Bulb Globe Temperature (WBGT) is used by many organizations to evaluate the relative heat strain during exposure to high ambient temperatures.
PMV: Predicted Mean Vote
Thermal sensation is mainly related by the heat balance of an individual with their surrounding environment. ISO 7730 offers a simple method for estimating whole body thermal sensation by considering the environmental conditions (e.g. ambient temperature, humidity) and person (e.g. activity level, clothing) to calculate the Predicted Mean Vote (PMV) and the predicted percentage of dissatisfied (PPD). This estimate is primarily used to assess indoor thermal comfort of workspaces, however it has been employed in outdoor settings. More info on ISO 7730 can be found here.
TNZ: Thermoneutral Zone
The Thermoneutral Zone (TNZ) is defined as the range of environmental conditions without physiological regulatory responses to alter metabolic rate or initiate sweating. For a given set of parameters, the range of ambient and skin temperature coinsiding with the thermoneutral zone will be returned.
HSDA: Heat Strain Decision Aid
The Heat Strain Decision Aid was developed by the U.S. Army Research Institute of Environmental Medicine to predict the core temperature response during marches in protective garments with or without excess load carry. This HSDA model provides the rise in core temperature over 480 minutes of work.