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Heat released by a system into its surroundings is by convention a negative quantity (Q < 0); when a system absorbs heat from its surroundings, it is positive (Q > 0).

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Example 05: Sensible heating: 'qSen' (+ve): energy transfer TO humid air
Webel: Psy/MPsy: Psychrometrics for Mathematica: Transferred heat (energy "Q") has field names with lower case 'qTot', 'qSen', 'qLat'. Heat rates (energy per time) have field names 'qDotTot', 'qDotSen', 'qDotLat' (to avoid clashes with Mathematica core)
Example 06: Sensible heating: 'qSen' per mass (+ve): energy transfer TO humid air
Example 07: Sensible cooling: 'qDotSen' (-ve): energy transfer rate FROM humid air
Example 08a: Humidification: Drying lumber with air: required volumetric air flow rate
Example 08b: Humidification: As a 2-step (3-state) process
Example 09: Moisture added to air: Amount (mass)
Example 10: Condition and dehumidify air by chilling and condensing some moisture: Process table
Example 11: Total (qDotTot), sensible (qDotSen), and latent cooling (qDotLat) required for cooling air
SysML4Mathematica: Example 05: Sensible heating: 'qSen' (+ve): energy transfer TO humid air
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Heat released by a system into its surroundings is by convention a negative quantity (Q < 0); when a system absorbs heat from its surroundings, it is positive (Q > 0).
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https://en.wikipedia.org/wiki/Heat
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In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary
A thermodynamic system does not contain heat. Nevertheless, the term is also often used to refer to the thermal energy contained in a system as a component of its internal energy and that is reflected in the temperature of the system.
Heat is energy in transfer to or from a thermodynamic system, by a mechanism that involves the microscopic atomic modes of motion or the corresponding macroscopic properties.
Defined quantitatively, the heat involved in a process is the difference in internal energy between the final and initial states of a system, and subtracting the work done in the process. This is the formulation of the first law of thermodynamics.
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