Pipe Insulation Heat Loss Calculator
Heat loss per metre of insulated pipe via radial conduction — bare vs lagged.
The first 25 mm does most of the work — 80%+ reduction on a hot line. Below ambient, insulation is also condensation control (see the dew-point margin tool).
Formula
Pipe Insulation Heat Loss Calculator is a free pipe heat loss for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Pipe Insulation Heat Loss Calculator
Heat loss per metre of insulated pipe via radial conduction — bare vs lagged. The calculation implements q = 2πΔT / (ln(r₂/r₁)/k + 1/(h·r₂)) (ISO 12241 — thermal insulation calculation). The first 25 mm does most of the work — 80%+ reduction on a hot line. Below ambient, insulation is also condensation control (see the dew-point margin tool).
How to use Pipe Insulation Heat Loss Calculator
- 1Enter Pipe outer diameter in mm.
- 2Enter Insulation thickness in mm.
- 3Enter Insulation conductivity in W/m·K (Mineral wool 0.04 · EPDM foam 0.036 · calcium silicate 0.06).
- 4Enter Pipe surface temperature in °C.
- 5Read Loss per metre (insulated), Loss if bare, Reduction instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pipe Insulation Heat Loss Calculator?
- ✓Implements the standard formula — q = 2πΔT / (ln(r₂/r₁)/k + 1/(h·r₂))
- ✓Reference cited on-page: ISO 12241 — thermal insulation calculation
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Pipe Insulation Heat Loss Calculator use?+
It computes q = 2πΔT / (ln(r₂/r₁)/k + 1/(h·r₂)), per ISO 12241 — thermal insulation calculation. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
The first 25 mm does most of the work — 80%+ reduction on a hot line. Below ambient, insulation is also condensation control (see the dew-point margin tool).
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the Pipe Insulation Heat Loss Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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