Date & Location
Simulation date
DST

Select the location on the earth map

Latitude: 51.477928
Longitude: 0
Time Zone: 0 GMT
 Outdoor Temperature
Min.(Sunrise)
°C
Max.(Afternoon)
°C
 Room General Settings
Start temperature
Midnight
°C
Balanced out = Run some similar 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-factor
-

 Wall West
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

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

 Wall North
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

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

 Wall East
Space beside
Wall Resistance
m²K/W

Static Temp.
°C
Inner Layer

Exterior Windows?

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


 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

Heating
Cooling
Supply water
°C

Return water
°C
Supply water
°C

Return water
°C

Screed type
Screed Thickness
mm

Pipe distance

The floor finishing affects the performance as well. See section: 'Room & Windows' > 'Floor'

Heating
Cooling
Power
W/m2
with ΔT
K

Supply water
°C

Return water
°C
Power
W/m2
with ΔT
K

Supply water
°C

Return water
°C

Activated Ratio 
%

Room Target temperature

Setpoint 'day'
°C
Setpoint 'night'
°C

Switch-over
Start of Day
End of Day
Installation Stand-by

Dynamic Thermal Simulation

ONE ROOM - ONE DAY

Temperatures | °C

Capacities | Watt



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.
  • Time zones are incorporated.
  • Daylight Saving Time (Summertime) applies on dates defined by the European Union, if enabled.
  • No climate file incorporated; Ambient outdoor tempratures can be set manually and a Clear Sky model (not clouded) is used.
  • 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 the radiant power will decrease/increase equally, depending on the interia of the screed.
  • An uniformal thermal mass is considered, but different internal surface resistances (horizontal, up- and downwards) are taken into account accoring to the NTA 8800.
  • The density and specific heat capacity of the indoor humid air is dynamically calculated with 50% relative humidity and 101325Pa (sea-level) air pressure.
  • 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.
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!