1. Environmental Criteria
The following data provides the designer with general values for Component Design Parameters – velocity, pressure losses – for ductwork, pipework.
The table below provide only the estimated data Component Design Parameters in accordance with the latest industry regulations and standards.
In order to know the exact data, make calculations for your building, please contact us.
2. Component Design Parameters
| Component | Value |
| Pipework Velocity: | |
| Conventional System | 0.75 – 1.5 m/s max (15-50mm dia) |
| 1.25 – 3.0 m/s max (over 50mm dia) | |
| Small Bore Pipework | 1 m/s |
| Corrosive Water | 2 m/s max |
| Pump Head in kPa | 0.36 x circuit length in m |
| System Water Content: | |
| Conventional Systems | 1 l/m2 of radiator surface area |
| Boiler Plant | 1.5 l/kW |
| Steel Panel Radiator | 5 l/kW |
| Heating Cooling Coils | 4.9 l/m2 of finned area |
| Pipework (Steel): | |
| 15 mm | 0.25 l/m |
| 25 mm | 0.60 l/m |
| 32 mm | 1.2 l/m |
| 40 mm | 1.5 l/m |
| Copper | +10% of steel values |
| Air conditioning air flow rate | 1 m3/s per kW of cooling |
| Fan electrical input | 1.6 x fan total pressure (kPa) |
| x volume Rate (m3/s) | |
| Ductwork Velocities: | |
| Low velocity system | 3 – 5 m/s |
| High velocity system | 7.5 – 15 m/s |
| Louvre face velocity | 2.5 m/s free area |
| Ductwork pressure losses: | |
| Low velocity system | 1 Pa/m run |
| High velocity system | 8 Pa/m run |
At REMARS, we use industry standards, regulations to help measure effective Ventilation Rates for buildings. Call us or send us email to help you properly size new HVAC equipment.
Get in touch…
we can help you get an accurate Ventilation Rates for your next project.
Written by REMARS Engineering Team
https://remars.co.uk
REMARS is a multidisciplinary MEP consulting team specialising in HVAC design, BIM integration, and complex engineering projects across commercial, industrial, and energy sectors.
