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Introduction to the main heat preservation method of HVAC pipe

2025/1/8

We see a lot of air ducts, have a layer of insulation on the outside so why do you want to do insulation? In fact, there are many advantages to insulation, first of all, literally, insulation is to maintain temperature, this temperature does not only refer to heat, there are cold air. Insulation can reduce energy loss, energy saving and environmental protection. The other is to isolate the air, which can prevent oxidation, which can increase the life of the air duct. There is also the reduction of condensation, the condensation phenomenon is that the temperature difference between the air duct and the outside causes the water in the air outside to condense into water vapor. Water will drip along the air duct, affecting indoor sanitation. There are also some functions such as sound insulation and insulation can reduce noise to a certain extent.

In order to better achieve the purpose of indoor temperature regulation and air cleanliness, the air duct of the air conditioning HVAC system can be roughly divided into three air duct insulation methods: internal insulation, external insulation, and middle layer insulation, and these three air duct insulation correspond to different air duct materials and installation methods. The following is a representative insulation material in the market "glass wool" to illustrate these three ways of insulation.
Hvac external insulation HVAC duct Outer insulation (external insulation), this insulation method is a common "external insulation material + metal duct" made of.
For example, the common "external thermal insulation" is directly outside the galvanized iron sheet air duct, adding a layer of thermal insulation material glass wool in order to play the role of thermal insulation. In general, the insulation effect of external insulation is general, the energy consumption will be relatively large, and the noise will be accompanied by the use of the process, which is a point that more people are criticized.
Hvac internal insulation HVAC duct Inner layer insulation (internal insulation), this insulation method, is a common "internal insulation material + metal duct" made of.
For example, the common "internal insulation" refers to the direct built-in of the glass wool layer of the air duct insulation material, and the formaldehyde-free environmental protection enhanced air duct that integrates the insulation and the air duct is a representative of it. Glass wool directly plays the role of energy saving and insulation, so the insulation in the air duct has high requirements for the insulation materials used, and it is generally the use of formaldehyde-free environmental protection glass wool to prevent the emission of harmful gases such as formaldehyde, which is harmful to our health.
The middle layer insulation (middle insulation) of the HVAC tube is made of the common "middle layer insulation material + double layer metal duct".
For example, the common "middle insulation" is to place the glass wool of the air duct insulation material directly in the middle of the sandwich of the double metal air duct, which means that the double metal air duct sandwiched the glass wool of the thermal insulation material in the middle, and the glass wool of the thermal insulation material is not exposed, forming the role of thermal insulation.
This kind of insulation method is represented by double-layer insulation metal air duct, which has low requirements for insulation materials. Compared with the above two kinds of insulation air ducts, the material cost of double-layer insulation metal air duct is much higher, and it is used in scenarios with higher safety and quality requirements.
There is also a common HVAC special "phenolic composite duct" efficient insulation: the thermal insulation material used by the popular duct has a thermal conductivity about 40% lower than that of the traditional duct. The non-metal structure and the unique link mode ensure the excellent air tightness of the ventilation system, completely eliminate the hidden dangers such as dripping and cold bridge, and minimize the loss of cold water and the energy loss of the duct wall. In particular, the popular iron sheet phenolic and double-sided color steel phenolic series, the thermal insulation material used - phenolic, its own thermal conductivity is only 0.024w/(m.k). It is estimated that 10,000 square meters of air pipes save 300,000 degrees of electricity every year.
With the development of society and the popularity of energy saving and environmental protection technology, HVAC is playing a more and more important role in our lives, it can help enterprises, institutions, commercial real estate, residential communities to improve thermal efficiency, save energy, but also improve air quality, improve people's living comfort, is an important part of the building function, the importance of HVAC industry is self-evident.
The above details the three common HVAC air duct insulation methods, as well as the corresponding different types of air duct insulation, so that we can have a more comprehensive understanding of the field of HVAC air duct insulation, especially HVAC industry practitioners, in the design work, consider more aspects, including HVAC air duct insulation. Here are three common HVAC air duct insulation methods in the industry, hoping to provide you with some reference when choosing HVAC air ducts.