Date & Location
Simulation date 
DST

Location & Weather:

Select the location on the earth map

Latitude: 51.477928°
Longitude: 0°
Time Zone: 0 GMT
 Weather
Cloud Cover

Min.(Sunrise)
°C
Max.(Afternoon)
°C
 General Simulation Settings
Start Indoor Temp.
Midnight
°C
'Balanced Out' includes 10 simulation days in advance.
Screens down
W/m²
Solar Radiation Threshold


 Room Size
Room Length
m
Room Width
m

Rotation (+/-45°)
°

 Build Quality level
(Infiltration) 

 Floor structure
Space below
Floor Resistance
m²K/W

Static Temp.
°C

Floor Material
Floor Finishing

 Ceiling structure
Level height
m
Lowered ceiling 
m

Space above level
Structure Resistance
m²K/W

Static Temp.
°C
Ceiling Material

 Wall South
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

Glass surface
U-value
W/m²K
Screens?
g-value
-

 Wall West
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

Glass surface
U-value
W/m²K
Screens?
g-value
-

 Wall North
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

Glass surface
U-value
W/m²K
Screens?
g-value
-

 Wall East
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

Glass surface
U-value
W/m²K
Screens?
g-value
-
 


 People
Amount
pers.
Activity
Presence scheme

 Lighting
Lighting Power Density
W/m²
Air extraction
Operating hours

 Devices & Equipment
Office
Laptops

Desktops

Monitors
Meeting room
TV-50"

TV-75"

Beamers

Specific capacity
Watt
Operating hours


  Central Ventilation Air
Ventilation Type
Air flow
m³/h

Heat recovery
Efficiency
%

Heating coil
Cooling coil
Supply Air Reset Schedule
Supply Temp.
°C
Supply Temp.
°C
When Outdoor
< °C
When Outdoor
> °C

Regulator
Operating hours

Heating & Cooling
Type
Mounted Position
Heating
Cooling
Supply water
°C

Return water
°C
Supply water
°C

Return water
°C

Screed type
Screed Thickness
mm

Pipe distance
Activated Surface Ratio
%

The floor finishing affects the performance as well. See section: 'Room & Windows' > 'Floor'
Thermal Power
W/m2
with ΔT
K

Supply water
°C

Return water
°C
Thermal Power
W/m2
with ΔT
K

Supply water
°C

Return water
°C

Activated Surface Ratio 
%
Thermal Power
W/unit
with ΔT
K

Supply water
°C

Return water
°C
Thermal Power
W/unit
with ΔT
K

Supply water
°C

Return water
°C
Thermal Power
W/rad.
with ΔT
K

Supply water
°C

Return water
°C
Thermal Power
W/unit

Number of units
units

 Room Target Temperature

Switch-over
Start of 'DAY'
Start of 'NIGHT'

DAY
Setpoint
°C
Setpoint
°C
When Outdoor*
< °C
When Outdoor*
> °C
NIGHT
Setpoint
°C
Setpoint
°C
When Outdoor*
< °C
When Outdoor*
> °C
*Yesterday's Mean Running Outdoor Temperature
Installation Stand-by

Dynamic Thermal Simulation

ONE ROOM - ONE DAY

Temperatures | °C
Interval Start 
 Interval End

Capacities | Watt
Interval Start
Interval End



About

Online Dynamic HVAC Room Simulator

With this online tool you can simulate thermal room conditions for ONE ROOM during ONE DAY.
This simulation gives results that are a simple representation of the real situation, and is intended as a Quick-scan design tool.

Starting points:
  • The simulation is focused on a single room and day simulation.
  • The solar culimination is determined by the time zone, longitude correction and Equation of time.
  • Daylight Saving Time (Summertime) applies on dates defined by the European Union, if enabled.
  • Ambient outdoor tempratures and cloud cover can be applied upon the Clear Sky model.
  • It is possible to make use of local Weather Data (Typical Meteorological Years) in the simulation.
  • Diurnal Cycle estimation for outdoor temperature, aligned with the solar orbit.
  • Thermal accumulation by the thermal mass of the inner layer is incorporated (SWM ISSO 32), but no exact structural structure build-up.
  • The ratio of influence of the the floor's working thermal mass and surface temperature and the radiant power will decrease/increase equally, depending on the interia of the screed.
  • An uniformal thermal mass is considered per surface, and different internal surface resistances (horizontal, up- and downwards) are taken into account accoring to the NTA 8800.
  • For radiation temperature, glass surface temperatures and closed surfaces are taken into account.
  • The density and specific heat capacity of the indoor humid air is dynamically calculated with 50% relative humidity and 101325Pa (sea-level) air pressure.
  • The simulation is thermal calculating without the effect of condensation. Therefore the actual HVAC capacities can differ from the simulation results.
  • For installations, a vertical temperature gradient of 0.5K per meter, is taken into account. (ΔT is different for floor/ceiling).
  • The room temperature is moddeled at 1.5m height (Mounting height room controller)
  • Sensible heat of the human metabolism does not depend on the room temperature.
  • Infiltration is calculated using ISSO 53, table 4.5.
  • An interval of 5 minutes is applied to reduce simulation time and to ensure a smooth user experience.
  • Night-sky radiation and external heat up by radiation are not incorporated.
  • Comfort Temperature is calculated based on surface temperatures and changing floor/ceiling temperatures because of integrated heating and cooling is incorporated. Sepearate heaters/radiators surfaces are not taken into account because the surface is not available.
For professional engineering, please use certified simulation software.
If just an quick indication of one single room on a specific day is what you need, this tool will most likely meet your needs!