Measurements of airtightness in hospitals
In hospitals, clean rooms and other classified areas, air density with underpressure and overpressure conditions is of extreme importance. For example, in operating rooms and research laboratories, clean air can be a matter of life and death. Thermodicht provides airtightness and ventilation measurements by utilizing our BlowerDoor (by fan) and tests whether the area meets the (proper) requirements. In addition we will provide you with an extensive report.
By utilizing the Minneapolis BlowerDoor measurement system, the measurement of air density is performed through a Door fan test.
The setup consists of a fan with controllable revolutions, an assessment falange and a door seal. By making use of the revolution-controlled fan the area that is to be tested will be pressurized whereupon the assessment falange is utilized in order to determine the increased or discharged flow rate. The pressurization of the area is done in increasing steps, at which, all types of pressures are measured to the corresponding flow rate. This is done in six pressure stages for both over- and under pressure. In the tested areas, the corresponding area-characteristics of the obtained measurement results are defined. From these characteristics, the corresponding run-off can be deduced to every desirable room pressure. According to the specifications of the applied equipment, a maximum deviation of 4 % is allowed. During these measurements, vents and channels are taped. Building openings are also taped in case they would normally be sealed off.
The isolation room must be completed, a leakage of up to 5% of supply air occurs. Before the first use and thereafter at regular intervals should be determined through validation that these requirements are met. Validation is best performed by a company that is independent of the installation company. This is a widely used Guideline on infection control for hospitals with the subject “Construction and design requirements isolation ward ventilation isolation rooms.
- Provides better understanding of pressure hierarchy of spaces
- Identify potential leaks where unwanted in or retirement of bacteria can occur in cleanrooms, laboratories and hospitals
- Makes clear where the penetration of dust and mold can occur
- Prevent mold development by early detection of any moisture increase in the structure by convection
- Gives a better answer to handling noise
- Control of smoke, which increases fire safety
- Contributes to lower power consumption and greater comfort
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