Advanced Engineering Calculators

Professional-grade tools for heat pump sizing, cold room design, process heating analysis and energy flow modelling. Used by Karnot engineers on every project.

These advanced calculators are provided free of charge to qualified engineers and energy managers. Create your free account to access all tools instantly — your details help our engineering team provide relevant follow-up support if your project needs it.

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Advanced Calculator Suite

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Heat Pump Sizing Calculator

Calculate building heat loss per BS EN 12831/ASHRAE, size a Karnot heat pump, and compare annual costs vs gas or diesel.

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Cold Room Load Estimator

Input room dimensions, insulation, product load and target temperature to calculate required cooling capacity for cold stores.

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Steam Boiler Replacement ROI

Calculate the exact financial and thermal impact of replacing your steam boiler with an R290 or CO₂ heat pump.

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Refrigerant & Oil Charge

Calculate precise refrigerant and oil charges based on system pipe length, diameter and component volumes.

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Cooling Tower Evaluator

Evaluate cooling tower performance, NTU, make-up water requirements and compare with heat pump alternatives.

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Pinch Analysis Tool

Identify optimal heat recovery in industrial processes. Find the pinch point and size a Karnot heat pump for maximum savings.

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Boiler Energy Flow Analyser

Interactive Sankey showing where your boiler loses energy. Model steam coil, sparging and heat pump scenarios live.

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Cold Chain Energy Flow Analyser

Compare HFC electric defrost, ammonia and Karnot iCOOL CO₂ + FLX Flex Defrost energy flows with live cost comparison.

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All advanced tools are free to use. Results are for indicative purposes — contact our engineering team for a detailed site survey and formal proposal.

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