德国STC

1. Measuring the four dimensions that determine environmental comfort

① Temperature: More stable temperature (small temperature difference, small supply air temperature difference, supply air temperature closer to the set temperature)

② Humidity: neither dry nor humid, water nourishes (not dry in summer, not stuffy in winter)

③ Airflow organization: conforms to the principle of air operation to improve comfort

Summer air conditioning cooling, cold air sinks; In winter, underfloor heating causes hot air to rise

(quieter: air conditioning cooling is quiet and gentle, underfloor heating is quiet and noiseless)

④ Cleanliness: Healthier (no dust from underfloor heating in winter)

2. How to choose air conditioning - the history of changes in household air conditioning

First generation air conditioner: window unit

① Only capable of cooling, not heating;

② No distinction between indoor and outdoor units;

③ Indoor primary heat exchange system with poor comfort;

④ Same air inlet and outlet, poor air supply method, and poor comfort;

⑤ High operating noise;

① Cooling and heating;

② Separate installation of outdoor and indoor units, one by one;

③ There are many outdoor unit positions;

④ Wall mounted and cabinet mounted machines occupy indoor space;

⑤ Poor comfort of indoor primary heat exchange system;

Third generation air conditioning: fluorine based central air conditioning

① Refrigeration and heating;

② One to many outdoor units;

③ Poor comfort of indoor primary heat exchange system;

The principle of the above three generations of air conditioners is the same, which is that the refrigerant directly enters the indoor unit and exchanges heat with the indoor air, achieving indoor cooling and heating. However, the comfort level is poor, with a large impact on humidity (dryness) and a single function (unable to directly connect to the ground for heating)

Fourth generation air conditioning: dual supply of air source heat pump underfloor heating air conditioning

3. Cooling comfort of water system

4. Comfort level of water system heating

Why install underfloor heating - the most comfortable heating method

Air conditioning and heating:

Advantages: When used with refrigeration and air conditioning units, it does not increase investment and heats up quickly;

Disadvantage: The use of forced convection heat transfer increases the indoor air flow rate and temperature, which can easily lead to dry, stuffy air, a blowing sensation, and discomfort to the human body when the upper part is hot and the lower part is cold; There is a sound.

Floor heating:

Advantages: Safe, comfortable, peaceful, clean, beautiful, low-temperature heating can be connected to various heat source devices;

Disadvantage: Heating up is not as fast as air conditioning.

6. Advantages of underfloor heating

① Comfort - Warm feet, cool head, not dry, no blowing sensation;

② Adaptability - can connect to multiple heat sources, easy to achieve low-temperature heating;

③ Environmental friendliness - able to use environmentally friendly energy;

④ Economy - can use energy-saving heat sources, low operating costs, and dry floor heating is more energy-efficient;

⑤ Safety - Low temperature heating, water system operation without leakage, no electromagnetic radiation, safe and reliable;

⑥ Aesthetics - does not occupy visible space, allows for free room design;

⑦ Simple control - matching multiple forms of control devices;

⑧ Multiple materials - optional stone, ceramic tiles, carpets, and composite flooring for floor installation;

⑨ Clean, dust-free, mold free, and healthy.