{"id":1935,"date":"2021-12-31T15:52:51","date_gmt":"2021-12-31T10:22:51","guid":{"rendered":"https:\/\/www.kewaunee.in\/blog\/?p=1935"},"modified":"2025-01-28T15:33:09","modified_gmt":"2025-01-28T10:03:09","slug":"hvac-system-validation-guidelines","status":"publish","type":"post","link":"https:\/\/www.kewaunee.in\/blog\/hvac-system-validation-guidelines\/","title":{"rendered":"HVAC System Validation Guidelines"},"content":{"rendered":"

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HVAC System Validation Guidelines<\/span><\/h1>[vc_column_text]Heating, Ventilation, and Air Conditioning (HVAC) is a much-required equipment in any laboratory. It controls how the temperature, humidity, and air flow works within the room. It\u2019s critical to the functioning of any laboratory, especially those that make use of hazardous materials.<\/span><\/p>\n

In this infographic, we will look at how a HVAC system<\/a> is validated before installation, and what aspects need to be considered for the same. If you\u2019re looking to commission such devices for your laboratory, you can have a look at our range of products here: <\/span>https:\/\/www.kewaunee.in\/ventilated-devices.php<\/span><\/a>[\/vc_column_text][vc_row_inner][vc_column_inner][vc_column_text]<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tests<\/strong><\/td>\nAcceptance Criteria<\/strong><\/td>\n<\/tr>\n
Air Flow Pattern<\/span><\/td>\n\n
    \n
  • Air flow should be from the higher pressure zone to the lower pressure zone in the room<\/span><\/li>\n
  • The air flow must be unidirectional only<\/span><\/li>\n
  • It must be recorded using video<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Air Flow Velocity & Change Per Hour<\/span><\/td>\n\n
    \n
  • It should be ensured that the measured air quantity must be more than the designed air quantity & calculated air changes<\/span><\/li>\n
  • Average air velocity of laminar flow = 90 +\/- 20%<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Filter Leak Test<\/span><\/td>\n\n
    \n
  • Penetration of 0.03% of particles is unacceptable (0.3 nm & larger than reference calibration curve of 99.97% efficient filters)<\/span><\/li>\n
  • Penetration of 0.01% of particles s unacceptable (0.3 nm & larger than reference calibration curve of 99.99% efficient filters)<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Particles Count<\/span><\/td>\n\n
    \n
  • Particle concentration should not exceed 3500 for 0.5 mm size and 0 for 5.0 mm size (at rest or in operation)<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Viable Monitoring<\/span><\/td>\n\n
    \n
  • Grade A\/5 – <1 CFU\/plate limit<\/span><\/li>\n
  • Grade B\/6 – <5 CFU\/ plate limit<\/span><\/li>\n
  • Grade C\/7 – <50 CFU\/ plate limit<\/span><\/li>\n
  • Grade D\/8 – <100 CFU\/ plate limit<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Filter Integrity Test<\/span><\/td>\n\n
    \n
  • Leakage rate must be less that 0.01% NMT and zero leakage at joints<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Pressure Difference<\/span><\/td>\n\n
    \n
  • Recorded once every 72 hours but the acceptance criteria depends on the specifications on the instrument<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Recovery (Temperature & Humidity)<\/span><\/td>\n\n
    \n
  • For any parameter, recovery time should not be over 15 minutes excluding viable count<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Temperature & Humidity Uniformity Test<\/span><\/td>\n\n
    \n
  • For either parameter, the temperature and humidity must be agreed upon between the lab supervisor and commissioning company<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Fresh Air Determination<\/span><\/td>\n\n