This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
Used for both the purge volume and the correct IGEM/UP/1B Ed. 4 tightness table (NG, LPG and LPG/Air each have different permissible drops).
Add Pipework Sections
Enter a length greater than 0.
Pipework + Meter Volume
0.0000 m³
+ Fittings Allowance (IVf, 10% of pipework)
0.0000 m³
Total Installation Volume (IV)
0.0000 m³
Required Purge Volume (PV = 1.5 × IV)
0.0000 m³
IGEM/UP/1B Ed. 4 Tightness Allowance
-
2. Tightness Testing
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
Existing (appliances connected)
New Installation
A new installation must show no pressure drop at all. The IV-based allowance below only applies to an existing installation with appliances connected.
Permissible Pressure Drop (IGEM/UP/1B Ed. 4)
-
0.0s
IGEM/UP/1B Ed. 4 standard duration: allow 1 minute for the pressure to stabilise, then time the test for exactly 2 minutes.
Start the timer the moment you record the start pressure, stop it the moment you record the end pressure.
Pressure Drop / Status
0.0 mbar
Test Duration
0.0s
3. Gas Flow Rate
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
Imperial
Metric
Enter a time greater than 0.
Metric meters show a digital cumulative reading rather than a dial to time — take two readings a short time apart instead.
0.0s
Tap Start the moment you take the start reading, then Stop the moment you take the end reading.
Time the reading gap with the timer above before calculating.
End reading must be greater than the start reading.
Use the CV shown on the gas supplier's certificate or meter data — this defaults to a typical UK natural gas value, but always confirm against the actual site figure.
Heat Input Output
0.00 kW
Net Reading (Volume Used)
0.000 m³
Volumetric Rate
0.00 ft³/hr
4. Heating Heat Loss
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
All dimensions must be greater than 0.
Required Radiator / Boiler Output
0.00 kW
Heat Output in BTU/hr
0 BTU/hr
5. AC Cooling Load
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
All dimensions must be greater than 0.
Required Cooling Capacity
0.00 kW
Cooling Capacity in BTU/hr
0 BTU/hr
6. Refrigerants & PT Slider
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
ODP Rating
0.00
GWP Rating
675
Boiling Pt @ 0 barg
-51.7 °C
Safety Class
A2L
Pressure / Temperature Calculator
Gauge bar(g)
Absolute bar(a)
bar(g)
Gauge is what a manifold set reads on site. Absolute = gauge + 1.01325 bar (atmospheric).
Bubble Point (Liquid)
0.0 °C
Subcooling Baseline
Dew Point (Vapor)
0.0 °C
Superheat Baseline
Temperature Glide Info
Near-azeotropic: Negligible temp glide.
Values are interpolated from standard refrigerant P-T reference points. For safety-critical or legal work, cross-check against the manufacturer's current P-T card.
7. Site PDF Report
This app can only work with the information provided and is not responsible for inaccurate outcomes. Data is accurate to the most recent app update. Engineers must follow industry guidelines as specified in their qualification training. This app is an assistive tool that is under constant upgrade.
Saved Calculations Log
No calculations added yet. Run a calculation and tap 'Add to Report'.
