Making sense of specification and energy saving

The most useful reading isn't company news — it's what feeds your decision: how to calculate the bill, how to pick a model, and how someone else's retrofit actually went.

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Case reviews

Anatomy of an electroplating-park fan retrofit: baseline to acceptance (placeholder)

How the baseline is measured, conditions normalised and acceptance figures verified — one project's savings accounting, end to end.

2026-07-18 · about 8 min

Engineering2026-07-12

Fan affinity laws: why a small drop in speed can cut power far more

No wall of formulas — one slider explains how flow, pressure and shaft power relate, and where theory parts company with measurement.

Selection guides2026-07-05

Five site parameters to nail down before specifying a waste-gas fan

Flow, pressure, medium, operating hours and electricity price — bring these five numbers and quotes become comparable.

Engineering2026-07-01

How much power does a 55 kW fan use in a year? One table settles it (placeholder)

The full calculation from rated power to the actual bill, with a lookup table for different run hours and tariffs.

Selection guides2026-06-30

Converting a belt-driven fan to direct drive: what to check (placeholder)

An in-situ swap isn't just bolting on a new fan — foundations, electrical capacity and duct matching all have to line up.

Company news2026-06-28

Monthly reporting goes live on the Dacheng O&M platform (placeholder)

Monthly savings comparisons, exception records and an operating ledger, exportable as PDF or Excel.

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