1.Introduction of the environmental control system of the breeding house
House environmental control refers to the provision of the comfortable in-door environment according to the animals’ growth. The in-door environment factors generally include temperature, humidity, ventilation, illuminance and concentration of harmful gases. It can adjust the environmental factors by using appropriate environmental equipment. 

2.The constituent of environmental control system
(1)Ventilation: fan(lengthways,crosswise,trench), side wind window/small ceiling/roller shutters,
(2)Heat preservation facility: electric insulation floor heating panel
(3)Cooling equipment: wet curtain
(4) Lighting equipment: lamp

3.Importance of ventilation
(1)Provide adequate oxygen to facilitate metabolism and ensure minimum ventilation (winter ventilation).
(2)Adjust room temperature to prevent heat stress and air cooling effect (cooling in summer)
(3) Adjust the humidity in the house. It will affect the growth when humidity >70%,   and too much dust when humidity <40% and easy to induce respiratory disease.
(4) Discharge harmful gases and dust (ammonia, hydrogen sulfide, carbon monoxide, carbon dioxide, etc.)

4.Importance of temperature
(1)Low temperature will lead to gathering, increase mortality rate, decline in growth rate and increase feed intake.
(2)High temperature will result in decreasing feed intake, decreasing growth rate, irritability and easy dehydrated.

5.Importance of lighting. 
(1) Sourcing of lighting: Make sure that the light source is close to natural light, so that the pig seems to grow under natural light.
(2)Light intensity: Too strong light will cause pigs to produce hyperactive stress phenomenon, and too weak light will reduce the activity of pigs. Therefore, a reasonable distribution of light sources can ensure the light intensity in the house in a suitable range of values, to ensure the vitality of pigs during the day, and to accelerate the growth rate.
(3)Light duration: The length of light duration will affect the growth activity of pigs to a certain extent. For example, in a rainy day, if the light time is insufficient in the daytime, the biological clock of pigs will be affected, and the pigs will have insufficient energy during the day, which will affect the feed intake.
(4)Light color: Our LED lighting tube, the light color is infinitely close to natural light, to ensure that pigs can enjoy the simulated nature of the light.