The most comfortable indoor temperature and humidity are: 18 ~ 25℃ in winter and 30% ~ 80% in humidity; In summer, the temperature is 23-28℃ and the humidity is 30-60%. More than 95% people feel comfortable in this range. In an air-conditioned room, people will feel most comfortable when the room temperature is 19 to 24℃ and the humidity is 40% to 50%.

The influence of too high or too low indoor temperature on people;

1. If the temperature difference between indoor and outdoor is too large, people can easily catch a cold in a hot and cold environment. For the elderly and patients with hypertension, the indoor temperature is too high, and human blood vessels dilate. At this time, if you go outdoors suddenly, the blood vessels suddenly contract, which increases the risk of cardiovascular and cerebrovascular accidents.

2. If the room temperature is too low, due to the stimulation of cold to the body, the excitability of sympathetic nervous system increases, which makes the blood vessels of limbs contract, the heart rate increases, and the workload of the heart increases, which is easy to cause angina pectoris.

Precautions for heating in winter:

1, keep indoor ventilation.

According to scientific statistics, every ventilation of indoor air can remove 60% of harmful gases in indoor air, which is beneficial to human health.

2. Keep the indoor air humidity.

It is best to put a bucket of water in every room of the house to increase the air humidity. Conditional families can install air humidifiers.

3. Prevent indoor pollution

Attention must be paid to prevent indoor pollution when heating in winter.