TAB stands for Testing, Adjusting and Balancing for HVAC systems. It refers to the steps taken by HVAC contractors to calibrate the HVAC unit in commercial establishments to achieve optimal performance and air quality.
The key to a comfortable and efficient space is the design and function of a building's HVAC systems. The testing, adjusting, and balancing (TAB) of the systems is what ensures they are functioning properly. Using the right instruments for the TAB process is fundamental to making the right adjustments, in order to achieve a productive system.
Testing is the base of our business, whether it is in new construction or already existing buildings, with chillers, boilers, air handlers, package units, exhaust and ventilation fans, circulating pumps, and many other equipment.
The varying of system flows by partially closing balancing devices, such as dampers and valves, and varying fan speeds to achieve optimum system operating conditions within design and installation limitations.
Balancing is the methodical proportioning of air and hydronic flows through the system mains, branches, and terminal devices using acceptable procedures to achieve the specified airflow or hydronic flow within installation, testing and design limitations.
IES offer a nationwide independent ductwork pressure testing service in accordance with SMACNA / ASHRAE/DW143 & DW144. We test that ductwork leakage is within the allowable rates stated in DW144. We produce all sign off documentation immediately to allow client witnessing and convenient sign off. Our staff are fully trained in the use of our state of the art equipment, testing methods and calculations. HVAC leakage testing is a crucial aspect of testing and commissioning for new buildings as well as refurbishment works.
Drawings will be requested prior to works commencing in order to accurately quote for works. Tests are carried out by dividing the ductwork into manageable test sections, test sections are blocked off using reusable blocking materials such as high quality foams. Test sections are placed under pressure, specified in SMACNA / DW143, results are then calculated and witnessed by the client for sign off. All documentation is sent out electronically to all parties on the day, this includes the test calculations and equipment calibration certificates.
Indoor air quality (IAQ) refers to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants.
Understanding and controlling common pollutants indoors can help reduce your risk of indoor health concerns. Health effects from indoor air pollutants may be experienced soon after exposure or, possibly, years later.
Good IAQ contributes to a favourable environment for students, performance of teachers and staff and a sense of comfort, health and well-being.
These elements combine to assist a school in its core mission educating children. Maintenance of acceptable temperature and relative humidity.
Indoor air problems arise such as: Headache, Fatigue, Shortness of breath, Sinus congestion, Coughing, Sneezing, Dizziness, Nausea and irritation of the eye, nose, throat and skin
CO2 : Non‐Dispersive Infrared (NDIR)
PM10 & PM2.5 : Light scattering or Beta attenuation method
CO/SO2/NO2/O3/NH3 : Electrochemical sensor
TVOC : PID – Photo ionization detector.
HCHO Formaldehyde : Photoelectric photometry method.
Relative humidity : Capacitive humidity sensor
Temperature : Resistance temperature Detector
Noise : Microphone
Light intensity : Photodiode or Pyrometer
Airborne Particle Counts, Airflow Volume Measurements, Pressure Differential Testing, Temperature, Humidity & Lux Level Recording, ISO Certification and Full Validation Report.