{"id":3442,"date":"2022-11-27T09:38:33","date_gmt":"2022-11-27T09:38:33","guid":{"rendered":"https:\/\/p69.com.vn\/?p=3442"},"modified":"2022-11-28T08:04:01","modified_gmt":"2022-11-28T08:04:01","slug":"dong-suong-cua-gio","status":"publish","type":"post","link":"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/","title":{"rendered":"Causes of vent dew and effective ways to fix it"},"content":{"rendered":"<p><strong><span style=\"vertical-align: inherit;\">Inlet dew<\/span><\/strong><span style=\"vertical-align: inherit;\"> is a common condition in air conditioning systems, when water vapor condenses at the louver surface, often appearing in slit-shaped louvers. Significantly affect the quality of the work, cause moldy plaster ceiling and cause discomfort to users. To know the causes and how to fix it, please follow the following article of <\/span><a href=\"https:\/\/p69.com.vn\/\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"vertical-align: inherit;\">the company P69<\/span><\/strong><\/a><span style=\"vertical-align: inherit;\"> !<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_45 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-69e7dfd6ab6e5\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-69e7dfd6ab6e5\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#What_is_the_phenomenon_of_vent_dew\" title=\"What is the phenomenon of vent dew?\">What is the phenomenon of vent dew?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#Causes_of_vent_dew\" title=\"Causes of vent dew\">Causes of vent dew<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#1_Due_to_indoor_unit\" title=\"1. Due to indoor unit\">1. Due to indoor unit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#2_Due_to_construction_techniques\" title=\"2. Due to construction techniques\">2. Due to construction techniques<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#3_By_design\" title=\"3. By design\">3. By design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#4_Improper_arrangement_of_cold_air_outlet\" title=\"4. Improper arrangement of cold air outlet\">4. Improper arrangement of cold air outlet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#5_Due_to_technical_insuring_of_cold_air_duct_insulation\" title=\"5. Due to technical insuring of cold air duct insulation\">5. Due to technical insuring of cold air duct insulation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#6_Design_without_cooling_load\" title=\"6. Design without cooling load\">6. Design without cooling load<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#How_to_fix_the_phenomenon_of_vent_dew\" title=\"How to fix the phenomenon of vent dew.\">How to fix the phenomenon of vent dew.<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#1_Increase_the_air_outlet_surface_temperature\" title=\"1. Increase the air outlet surface temperature\">1. Increase the air outlet surface temperature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#2_Isolate_the_surface_causing_dew\" title=\"2. Isolate the surface causing dew\">2. Isolate the surface causing dew<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#3_Use_dehumidification_processes\" title=\"3. Use dehumidification processes\">3. Use dehumidification processes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#4_Design_Solution\" title=\"4. Design Solution\">4. Design Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#5_Operation_Solution\" title=\"5. Operation Solution\">5. Operation Solution<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/p69.com.vn\/en\/dong-suong-cua-gio\/#Contact_information_P69_-_M_E_Contractor\" title=\"Contact information P69 \u2013 M&amp;E Contractor\">Contact information P69 \u2013 M&amp;E Contractor<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_phenomenon_of_vent_dew\"><\/span><span style=\"vertical-align: inherit;\">What is the phenomenon of vent dew?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"vertical-align: inherit;\">Dew point occurs when the temperature difference between the low-temperature material surface and the higher-temperature space reaches the dew point, which is determined based on the parameters on the humid air graph.<\/span><\/p>\n<figure id=\"attachment_3450\" aria-describedby=\"caption-attachment-3450\" style=\"width: 960px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3450 size-full\" title=\"What is the phenomenon of vent dew?\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/anphucuong_vn1.jpg\" alt=\"What is the phenomenon of vent dew?\" width=\"960\" height=\"288\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/anphucuong_vn1.jpg 960w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/anphucuong_vn1-300x90.jpg 300w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/anphucuong_vn1-768x230.jpg 768w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/anphucuong_vn1-600x180.jpg 600w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><figcaption id=\"caption-attachment-3450\" class=\"wp-caption-text\"><em><span style=\"vertical-align: inherit;\">What is the phenomenon of vent dew?<\/span><\/em><\/figcaption><\/figure>\n<p><span style=\"vertical-align: inherit;\">In the field of air conditioning and ventilation, the problem of fogging and how to fix it is always the most shared and interested topic. Dew condensation not only causes unsightly but also affects the architecture of the building such as water seepage, rotting the decorative plaster ceiling, shorting electrical equipment and damaging the interior below.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Causes_of_vent_dew\"><\/span><span style=\"vertical-align: inherit;\">Causes of vent dew<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"vertical-align: inherit;\">The typical environment of Vietnam is tropical climate: hot and humid, temperature fluctuations during the day can be very large. At the location of low-temperature air-conditioning vents, when exposed to humid air in the room, if the temperature is lower than the dew point temperature, the humid air will turn into dew and cause dew condensation at the vents. This phenomenon often occurs with the first operation of the ventilation system, or when the weather changes.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">There are also the following basic reasons:<\/span><\/p>\n<h3 id=\"ftoc-heading-3\" class=\"ftwp-heading\"><span class=\"ez-toc-section\" id=\"1_Due_to_indoor_unit\"><\/span><strong><span style=\"vertical-align: inherit;\">1. Due to indoor unit<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"vertical-align: inherit;\">Throttle valve is broken, or clogged<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">The indoor unit fan is weak, not enough air flow<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">Condensate pump weak, or damaged<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">Heat exchanger indoor unit, dust return filter mesh<\/span><\/li>\n<\/ul>\n<h3 id=\"ftoc-heading-4\" class=\"ftwp-heading\"><span class=\"ez-toc-section\" id=\"2_Due_to_construction_techniques\"><\/span><strong><span style=\"vertical-align: inherit;\">2. Due to construction techniques<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">Insulation is not properly applied, the door box is not insulated, the thickness of the layer is not correct<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">The cold air duct is open, the flexible duct is torn or bent, causing the air flow to decrease<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Too long hard and soft wind pipes create too much resistance, making the wind speed out at the door weak<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">The condensate line does not ensure the slope, the condensate does not drain properly, overflows the trough, returns to the coil and is blown down the vent.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">In indoor units with high pressure head and fan capacity, more condensate traps should be arranged<\/span><\/p>\n<h3 id=\"ftoc-heading-5\" class=\"ftwp-heading\"><span class=\"ez-toc-section\" id=\"3_By_design\"><\/span><strong><span style=\"vertical-align: inherit;\">3. By design<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">Calculation of the flow distribution on the pipeline, the outlet at the vent positions of the AHU, FCU is not accurate<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">The main air duct, branch pipe, flexible pipe to the air outlet are arranged too far, the indoor unit pressure head is not enough<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">The arrangement of the number of air vents is not suitable in terms of quantity and location. Avoid placing air vents in high temperature areas: near glass doors, avoid hot air circulation: atrium locations, main doors often come in and out&#8230;<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">The calculation and design of the ducts are not suitable: size, length, branching&#8230; leading to too high or too low wind speed.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Normally, we calculate the wind speed in the pipeline as follows:<\/span><\/p>\n<ul>\n<li><span style=\"vertical-align: inherit;\">Main pipeline wind speed is: 11m\/s<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">The return pipe wind speed is: 6m\/s<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">The wind speed at the louver, the wind mouth is: 2.5m\/s<\/span><\/li>\n<li><span style=\"vertical-align: inherit;\">In flexible ductwork is: 3.5m\/s<\/span><\/li>\n<\/ul>\n<p><span style=\"vertical-align: inherit;\">The selection of cooling capacity is lacking, the outlet temperature at the vent is usually from 10\u00b0C to 15\u00b0C because there is not enough cooling capacity for the room space, so the temperature difference at the surface of the louver and the surrounding air is very big<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Improper_arrangement_of_cold_air_outlet\"><\/span><strong><span style=\"vertical-align: inherit;\">4. Improper arrangement of cold air outlet<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">When designing, it is necessary to arrange the air vent to avoid placing too close to the glass door or the glass wall that is directly exposed to the sun outside, which will cause a temperature difference that is easy to dew on the glass wall and the wind mouth.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Due_to_technical_insuring_of_cold_air_duct_insulation\"><\/span><strong><span style=\"vertical-align: inherit;\">5. Due to technical insuring of cold air duct insulation<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">&#8211; When constructing duct insulation, cold air outlet should be carefully calculated to avoid dew condensation. Technical characteristics of the insulation layer should be checked such as thickness, density,\u00a0 <\/span><em><span style=\"vertical-align: inherit;\">and thermal conductivity coefficient of materials<\/span><\/em><span style=\"vertical-align: inherit;\"> .<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; It should be noted that outdoor and indoor installation spaces in air-conditioned spaces will have different insulation thicknesses.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Design_without_cooling_load\"><\/span><strong><span style=\"vertical-align: inherit;\">6. Design without cooling load<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">&#8211; Lack of cooling load is one of the frequent causes of dew at the mouth of the wind.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; The air outlet temperature is usually from 10 \u00b0C to 14 \u00b0C, so after using the air conditioner, the room temperature does not decrease, there will be a phenomenon of dew at the mouth, to overcome it is necessary to determine the air-conditioning space, calculate suitable load, for special spaces, not based on experience, but must calculate the design by specialized software to calculate the design.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; Design of water trap at indoor units with large fan head is not technical, leading to condensate being sucked into the unit.<\/span><\/p>\n<h2 id=\"ftoc-heading-6\" class=\"ftwp-heading\"><span class=\"ez-toc-section\" id=\"How_to_fix_the_phenomenon_of_vent_dew\"><\/span><span style=\"vertical-align: inherit;\">How to fix the phenomenon of vent dew.<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_3451\" aria-describedby=\"caption-attachment-3451\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3451 size-full\" title=\"How to fix the phenomenon of vent dew.\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/nguyen-nhan-dong-suong-cua-gio.webp\" alt=\"How to fix the phenomenon of vent dew.\" width=\"700\" height=\"421\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/nguyen-nhan-dong-suong-cua-gio.webp 700w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/nguyen-nhan-dong-suong-cua-gio-300x180.webp 300w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/11\/nguyen-nhan-dong-suong-cua-gio-600x361.webp 600w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-3451\" class=\"wp-caption-text\"><em><span style=\"vertical-align: inherit;\">How to fix the phenomenon of vent dew.<\/span><\/em><\/figcaption><\/figure>\n<p><span style=\"vertical-align: inherit;\">It must be affirmed that it is impossible to completely solve the problem of dew. However, solutions can be used to limit the accumulation of dew at the mouth of the wind. That solution depends on the use of the project and investment costs.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">As mentioned in the basic causes above, we have 3 main methods to deal with the root:<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Increase_the_air_outlet_surface_temperature\"><\/span><b><span style=\"vertical-align: inherit;\">1. Increase the air outlet surface temperature<\/span><\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">For some designs, there is a small resistance at the vent surface to warm the surface above the dew point of the air state in the conditioned space.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Isolate_the_surface_causing_dew\"><\/span><b><span style=\"vertical-align: inherit;\">2. Isolate the surface causing dew<\/span><\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">This is the treatment method commonly used by operational engineers. By increasing the wind velocity at the vent, we can drive away the surrounding moist air layers and limit their contact with the vent surface.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">However, this method can only be used in a very small number of cases. Because the increased wind speed at the mouth will cause noise and when the ambient humidity is too high, this is not effective and can also cause additional energy consumption in the fan. \u261e Fix dew in the mouth of the wind.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Use_dehumidification_processes\"><\/span><b><span style=\"vertical-align: inherit;\">3. Use dehumidification processes<\/span><\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">The dehumidifier can be used directly or the dehumidifier (the dehumidifier can be used separately or in the same room as the air conditioner).<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Design_Solution\"><\/span><strong><span style=\"vertical-align: inherit;\">4. Design Solution<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">&#8211; For constructions, it is absolutely required not to drop water on objects inside. The system of ducts and louvers must be designed to go underground. The direction of blowing for diffusion as well as heat recovery is upward or horizontal. The fresh air duct system must undergo dehumidification treatment. The calculation of wind speed in the ductwork, at the supply and return air intakes must also be calculated and adjusted accordingly.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; With works with lower requirements. It is possible to arrange ventilation systems, air vents on the ceiling and downwards. With this system, it will help reduce investment costs to match the budget.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Operation_Solution\"><\/span><strong><span style=\"vertical-align: inherit;\">5. Operation Solution<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"vertical-align: inherit;\">For projects that have been put into operation but still have the above problems, solutions for system operation can be used to limit them.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; Check the wind speed at the air inlets, the wind speed is too small &#8220;Output air is too cold&#8221; \u21d2 It will cause long-term heat accumulation at the location around the air outlet. Exacerbation of dew. Then increase the speed of the air conditioner fan. In addition, check the air ducts for blockages or distortions.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; Check the air valve to see if the opening has reached. If the valve opening is too small, it can also obstruct the air flow, affecting the wind speed.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; Check doors and windows. If it is not closed, it must be closed completely to isolate the environment inside and outside the building.<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">&#8211; Check the flow of fresh air, if the amount of fresh air is too large. It is possible to adjust the fan rotation speed or close the air flow control valves<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Contact us today for a free consultation and answer at:<\/span><\/p>\n<div dir=\"auto\">\n<div dir=\"auto\">\n<div dir=\"auto\">\n<h2 dir=\"auto\"><span class=\"ez-toc-section\" id=\"Contact_information_P69_-_M_E_Contractor\"><\/span><span id=\"Thong_tin_lien_he_P69_-_Nha_Thau_Co_Dien_M_E\" class=\"ez-toc-section\"><\/span><span id=\"Thong_tin_lien_he_P69_-_Nha_Thau_Co_Dien_M_E\" class=\"ez-toc-section\"><\/span><span id=\"Thong_tin_lien_he_P69_-_Nha_Thau_Co_Dien_M_E\" class=\"ez-toc-section\"><\/span><span id=\"Thong_tin_lien_he_P69_-_Nha_Thau_Co_Dien_M_E\" class=\"ez-toc-section\"><\/span><strong><span style=\"vertical-align: inherit;\">Contact information P69 \u2013 M&amp;E Contractor<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div dir=\"auto\">\n<div dir=\"auto\">\n<div dir=\"auto\">\n<p><span style=\"vertical-align: inherit;\">Address: No. 6\/165C Xuan Thuy, Cau Giay District, Hanoi<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Website: https:\/\/p69.com.vn\/<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Hotline: 02422121212 \u2013 0965937799<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Email: kd@cokhip69.com.vn<\/span><\/p>\n<p><span style=\"vertical-align: inherit;\">Facebook:\u00a0 <\/span><a href=\"https:\/\/www.facebook.com\/p69nhathaucodien\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"vertical-align: inherit;\">https:\/\/www.facebook.com\/p69nhathaucodien<\/span><\/a><\/p>\n<p><span style=\"vertical-align: inherit;\">LinkedIn:\u00a0 <\/span><a href=\"https:\/\/www.linkedin.com\/in\/congtyp69\/\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"vertical-align: inherit;\">https:\/\/www.linkedin.com\/in\/congtyp69\/<\/span><\/a><\/p>\n<p><span style=\"vertical-align: inherit;\">Youtube :\u00a0 <\/span><a href=\"https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"vertical-align: inherit;\">https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA<\/span><\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;3442&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; 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Significantly affect the quality of the work, cause moldy plaster ceiling and cause discomfort to users. To know the causes and how to fix it, please follow the following article of the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3451,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-3442","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.1.1 (Yoast SEO v20.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Nguy\u00ean nh\u00e2n g\u00e2y \u0111\u1ecdng s\u01b0\u01a1ng c\u1eeda gi\u00f3 v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3<\/title>\n<meta name=\"description\" content=\"\u0110\u1ecdng s\u01b0\u01a1ng c\u1eeda gi\u00f3 l\u00e0 m\u1ed9t t\u00ecnh tr\u1ea1ng d\u1ec5 g\u1eb7p ph\u1ea3i trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, khi m\u00e0 h\u01a1i n\u01b0\u1edbc ng\u01b0ng t\u1ee5 t\u1ea1i b\u1ec1 m\u1eb7t c\u1eeda gi\u00f3...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/p69.com.vn\/dong-suong-cua-gio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[:vi]Nguy\u00ean nh\u00e2n g\u00e2y \u0111\u1ecdng s\u01b0\u01a1ng c\u1eeda gi\u00f3 v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3[:en]Causes of vent dew and effective ways to fix it[:]\" \/>\n<meta property=\"og:description\" content=\"\u0110\u1ecdng s\u01b0\u01a1ng c\u1eeda gi\u00f3 l\u00e0 m\u1ed9t t\u00ecnh tr\u1ea1ng d\u1ec5 g\u1eb7p ph\u1ea3i trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, khi m\u00e0 h\u01a1i n\u01b0\u1edbc ng\u01b0ng t\u1ee5 t\u1ea1i b\u1ec1 m\u1eb7t c\u1eeda gi\u00f3...\" \/>\n<meta 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