bms:bestpractice:roomcontrol:headpage

Room control
Discussion

Room control

Controlling the environment in a room can be tricky. Often it's based on an economic viewpoint. I will try explaining different sensors and outputs and what I've seen used practically with good results.

I will try explaining “Best Practice” or “Ideas of best practice” below with increasing advancements.

Room control Heat

Simplest automation, is a room temperature sensor controlling room heating. Heat setpoint at 23 °C, and when room temperature gets below this setpoint, you can start regulation your heat option.

Regulation types

Regulators can be a difficult subject that requires a comprehensive explaination. For now I'll just explain 2 types.

Control curve

Control curves can be 2 points and upwards (Often no more then 10 points) For heating, imagine 2 points in a curve, where X is the temperature below setpoint eg. 10 to 0 degrees below, and Y is a percentage from 100% to 0%. See the graph below.

PID Regulator

Please visit the PID guide in guides section

Sensors explained

A sensor is basically anything inbound information, from temperature to light status.

Sensor type	Shortname EN	Shortname DK	Unit	Description
Temperature	RT	TR	°C or °f	Room temperature is the most basic sensor, used for controlling heating.
Carbon dioxide	Co2	Co2 or LK	ppm	Co2 is used to determine “air quality” or “the human influence” in the room.
Relative Humidity	RH	RH	%RH	“Relative humidity” is the amount of water vapor present in air expressed as a percentage (%RH) of the amount needed to achieve saturation at the same temperature. Too low or high values have significant impact on air quality.
Pressence detection	PD	PIR	On or off	Pressence detection is often used with a motion detector, but could also be infrared sensors or an ultrasonic detection system (rare or in combination with motion detection).
Light level	LUX	LX or LUX	lx	Measurement of the illuminance of a surface (lx), used to regulate output of the lightsource.
Window sensor	WS	VK	Open or Closed	Windows sensor is typically a magnet switch, used to regulate air valves and temperature