hvac system design and commissioning

air density

To create a functional air density calculator, we need to consider the standard formula for calculating air density, which is:

\[ \text{Density} = \frac{P}{R \times T} \]

Where:
– \( P \) is the pressure in Pascals (Pa)
– \( R \) is the specific gas constant for dry air (\( R = 287.05 \, \text{J/(kg·K)} \))
– \( T \) is the temperature in Kelvin (K)

Here’s the complete HTML, CSS, and JavaScript code for the air density calculator:

“`html





Air Density Calculator





















“`

### Explanation:
– **HTML**: The form includes two input fields for pressure and temperature, a button to trigger the calculation, and areas to display the result and any error messages.
– **CSS**: Styles the form with a light gray background, rounded corners, and other aesthetic enhancements.
– **JavaScript**: Performs form validation, converts Celsius to Kelvin, calculates air density using the provided formula, and displays the result or an error message.