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# Room Sensible Heat Factor - RSHF

## Room Sensible Heat Factor - RSHF - is defined as the sensible heat load divided by the total heat load in a room

The Room Sensible Heat Factor - RSHF - expresses the ratio between sensible heat load and total heat load in a room. It can be expressed as:

RSHF = Qsr / Qtr                           (1)

where

RSHF = room sensible heat factor

Qsr = sensible heat load in room (kW, Btu/hr)

Qtr = total heat load in room (kW, Btu/hr)

(1) can be modified to:

RSHF = cp (tr - ti) / (hr - hi)                                 (2)

where

cp = specific heat air (kJ/kg.oC)

tr = room temperature (oC)

ti = inlet temperature (oC)

hr = room enthalpy (kJ/kg)

hi = inlet enthalpy (kJ/kg)

### Example - Room Sensible Heat Factor - RSHF

The sensible heat generated within a room is 4 kW. The latent heat generated is 1.4 kW.

The Room Sensible Heat Factor can be calculated as:

RSHF = (4 kW) / ((4 kW) + (1.4 kW))

= 0.75

## Related Topics

• ### Air Psychrometrics

Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

## Related Documents

• ### Air - Thermophysical Properties

Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.
• ### Cooling and Heating Equations

Latent and sensible cooling and heating equations - imperial units.
• ### Cooling Load - Latent and Sensible Heat

Latent and sensible cooling loads to consider when designing HVAC systems.
• ### Great Sensible Heat Factor - GSHF

The Great Sensible Heat Factor is the ratio sensible to total heat in a cooling coil.
• ### Heat Index

Equivalent heat index vs. air temperature and relative humidity - in degrees Fahrenheit and Celsius.
• ### Human Heat Gain

Heat gain from persons in air conditioned spaces - in btu/hr.
• ### Indoor Relative Humidity vs. Outdoor Relative Humidity and Temperature

Recommended indoor relative humidity vs. outdoor relative humidity and temperature.
• ### Latent Heat Flow

Latent heat is the heat when supplied to or removed from air results in a change in moisture content - the temperature of the air is not changed.
• ### Metabolic Heat Gain from Persons

Human metabolic heat gain in air conditioned rooms.
• ### Sensible Heat Flow

Sensible heat is dry heat causing change in temperature but not in moisture content
• ### Sensible Heat Ratio - SHR

The ratio Sensible Heat (or Cooling) Load to the Total Heat (or Cooling) Load.

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## Citation

• The Engineering ToolBox (2004). Room Sensible Heat Factor - RSHF. [online] Available at: https://www.engineeringtoolbox.com/rshf-room-sensible-heat-factor-d_701.html [Accessed Day Month Year].

Modify the access date according your visit.

7.25.9

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