Trade toolkit
The calcs you do on the back of every bill.
Gas rate, pipe sizing, heat loss, ventilation — built into the app, attached to the visit. UK-spec, regulation-aware, plain English.
Gas rate
Gas rate
Saved · 14:02Heat input
Manufacturer rated · 28 kW
Pipe sizing
Pipe sizing
22kW · 6m runHeat load
22 kW
Pipe length
6.0 m
Heat loss
Heat loss
3-bed semi · −2°C designTotal heat loss
Recommended boiler · 24–28 kW combi
Gas rate
Heat input from a 2-minute meter read.
Punch in the start and end readings. We do the maths against the calorific value, compare to the appliance's rated input and tell you if it's in tolerance.
- Auto-converts m³ → kW
- Compares against rated input
- ±2% tolerance check built-in
- Saved on the appointment record
Gas rate
Saved · 14:02Heat input
Manufacturer rated · 28 kW
Pipe sizing
22kW · 6m runHeat load
22 kW
Pipe length
6.0 m
Pipe sizing
No more guessing 22 or 28.
Plug in heat load and pipe length, get the right diameter every time. Reference table on screen. Result saved with the job.
- Diameter recommendation by load + length
- Visual size comparison
- Reference table for quick checks
- Saved against the appointment
Heat loss
Right-size the boiler. First time.
Whole-house heat loss broken down per room. Recommendation by combi or system size. Stop oversizing every install.
- Per-room heat loss breakdown
- Total kW with boiler size suggestion
- U-value defaults by build era
- Saves you from oversize callbacks
Heat loss
3-bed semi · −2°C designTotal heat loss
Recommended boiler · 24–28 kW combi
1 sec
Calculation done
No fag-packet maths. Tap, type, result.
Saved
On the appointment
Calcs attached to the visit they were done on.
Verified
By UK regs
Calculators built to British Standards & GSIUR.
Live
Across all devices
Phone in the van, laptop in the office.
The toolkit
Calcs that come with the job.
Gas rate calculator
Heat input from gas meter readings.
Pipe sizing
Diameter & length recommendations by load.
Heat loss
Whole-house heat loss for boiler sizing.
Ventilation
Required ventilation by appliance type.
Saved calcs
Every calculation logged on the appointment.
Built for trades
UK-spec, regulation-aware, plain English.
Stop scribbling on the back of a card.
Right calcs. Right answers. Right on the record.