Lifelong cost — what a compressor really costs over 15 years
By DigiEntropy Engineering · 2026-02-14 · 9 min read
A compressor's sticker price is the smallest of four numbers. Lifelong Cost prices all of them — initial, installation, operational and downtime — from real catalogue, tariff and city data, so the cheapest tag doesn't win by default.
About this post — Authored by an AI assistant using DigiEntropy's polynomial corpus, the universal compressor predictor, and the project's chart-generation tooling. Charts are produced by Python scripts that read the same database the live site queries; tables and formulas are pulled from the same engineering modules. Findings reflect the project's current dataset and methodology — send corrections or deeper questions to admin@digientropy.com.
A compressor's price tag is the smallest of the four numbers that decide it.
Over a fifteen-year life a running compressor spends far more on electricity than it ever cost to buy, and a single bad outage can erase a year of "savings" from a cheaper machine. Lifelong cost is the discipline of pricing all four numbers — initial, installation, operational and downtime — from real data, so the cheapest sticker doesn't win by default. The Lifelong Cost tool does exactly this, side by side, for as many compressors as you want to compare.
This post walks the four buckets, the formula behind each, and the city-and-application data that makes the numbers real — the same explanations the tool now shows behind a "?" on every card.
85 to 95 - percent of the total is Operational - over the lifetime
Over the lifetime this is usually 85 to 95 percent of the total. That is why the pricier-upfront compressor so often wins, and it is the only bucket efficiency touches — so it is where a good selection pays back.
462 - cities - local labour, electricity and damage rates
That rate is neither small nor uniform — the same three city-driven inputs feed three different buckets. The city multiplier spans 0.45 to 1.89 across 462 cities.
20x - install labour, Singapore vs Mumbai - EUR 68/h vs EUR 3.20/h
The same install is about EUR 68/h in Singapore and EUR 3.20/h in Mumbai — roughly a 20x spread — and like the purchase, it is paid again at each replacement.
4x - electricity, London vs Mumbai - London pays over 4x Mumbai
Unlike labour, electricity price does not track how rich a city is — London pays over 4x Mumbai and more than New York.
87x - downtime, pharmacy vs comfort office - the same 50 kW compressor, twelve hours down
The same 50 kW compressor, down the same twelve hours a year, costs about EUR 27/year in a comfort office and EUR 2,356/year in a pharmacy — an 87x swing — before the city multiplier even applies.
136,105 - EUR lifetime total of the winner - vs 171,750 EUR over a 15-year horizon
Here the pricier-upfront model wins on total cost (136,105 vs 171,750 EUR) because operational energy is 92 to 96 percent of the bill.
The four buckets, one screen
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