Engineering as Marketing

Lissi Tools

A free ecosystem of mini-apps designed to solve real problems in the field. Built by and for HVAC-R experts.

Enter the fault code for any brand and AI will tell you exactly which component to check.

Calculate superheat and subcooling in real time for perfect thermal load adjustment.

Calculate GWP and CO₂-equivalent tonnes instantly after a refrigerant recharge or recovery.

Generate professional technical checklists by equipment type (VRV, Chiller, Split) — ready to download or export to Lissi.

Help your customers decide. Show the energy savings in dollars when replacing an old unit with an Inverter model.

Estimate the BTU/h or kW of cooling required for a space to right-size the air conditioning equipment.

Calculate superheat and subcooling per refrigerant to diagnose system gas charge in seconds.

Filter by brand and look up the verified meaning of any display code, with likely causes and safe inspection steps.

Convert pressure, temperature, capacity and flow instantly: PSI, bar, kPa, °C, °F, BTU/h, kW and refrigeration tons.

Look up pressure-temperature charts and compare GWP, ODP, safety class and regulatory status for each HVAC-R refrigerant.

We build this ecosystem for you. Tell us what problem you face in the field and we'll develop a solution.