1.0.1 In order to unify the technical requirements of residential fresh air system engineering, ensure project quality, and improve indoor air quality of residential buildings, this standard is formulated. 1.0.2 This standard is applicable to the design, construction, acceptance, and operation maintenance of fresh air systems for new and existing residential buildings. 1.0.3 The design, construction, acceptance, and operation maintenance of residential fresh air systems should not only comply with the provisions of this standard, but also comply with the current relevant national standards. Terminology 2.0.1 Fresh air introduces indoor outdoor air. 2.0.2 Exhaust air refers to the air discharged from indoors to outdoors. 2.0.3 Outdoor air system is a ventilation system composed of fans, purification and other processing equipment, air ducts and their components, which sends fresh air indoors and exhausts indoor air to the outside. 2.0.4 A ductless outdoor air system is a fresh air system that directly supplies (exhausts) air to the indoor area without the need for connecting air ducts. 2.0.5 Centralized Outdoor Air System: The centralized outdoor air system is equipped with fans and purification equipment. After centralized treatment, the fresh air is sent to multiple indoor fresh air systems through air supply pipes. 2.0.6 Household Outdoor Air System: A separate outdoor air system for each household
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China