How do you calculate coil scrap cost?

Multiply the number of scrapped coils by the replacement cost per coil and by the share charged to this scope, then add the fixed handling and disposition cost. With 14 coils at $950 each at 100% scope plus $800 fixed, that is $13,300 variable plus $800, or $14,100 total.

Why include a scope percentage instead of just counting coils?

The scope percentage lets you allocate scrap that is partly caused by upstream tube-mill defects or shared between product families. Setting it to 100% charges the full coil value to this line; a lower value splits responsibility.

What is a good coil scrap rate for heat pump assembly?

Mature finned-tube coil lines typically run 1-3% scrap after braze and pressure test. Above 5% usually points to a brazing fixture, flux, or leak-test calibration problem worth chasing.

Should disposition and handling cost really be separate?

Yes. Cutting copper and aluminum for recycling, transport, paperwork, and rejected-material tracking are largely fixed per batch and do not scale linearly with coil count, so they belong in the fixed term.

Does the replacement cost include brazing labor?

It should. Use the full loaded cost to replace the coil — raw copper and aluminum, fins, fittings, braze alloy, and the skilled labor hours — not just the bill of materials. A bare-material number understates the loss.

How can I reduce coil scrap cost the fastest?

Target the dominant failure mode first. Braze leaks and pinholes usually drive the most scrap, so improving leak-test sensitivity, braze gap control, and operator technique typically cuts the variable term faster than chasing fin damage.

Industrial Heat Pumps & Electrified Thermal Systems calculator

Heat Pump Coil Scrap Cost Calculator

Coil scrap cost captures the real dollar loss when heat pump and electrified thermal coils are rejected for brazing leaks, fin damage, fouling, or failed pressure tests. Process engineers and quality managers on heat pump assembly lines use it to size the financial impact of coil yield loss before it gets buried in plant overhead. Because finned-tube coils carry significant copper and aluminum content plus skilled brazing labor, each scrapped unit is expensive, and the disposition handling cost on top can be material. Knowing this number turns a vague 'we scrap some coils' into a defensible cost-of-quality figure for capital and process-improvement decisions.

What this calculator does

Estimate the dollar impact of scrapped heat pump coils by combining rejected quantity, loaded coil cost, allocated scope, and fixed handling or disposition cost.
Use it when operations, quality, or supplier teams need to quantify evaporator, condenser, hot water, or recovery coil losses during receiving, assembly, or final test.
It computes the total dollar cost of scrapped heat pump coils by multiplying coil count by replacement cost and the scope percentage, then adding fixed handling and disposition cost.

Formula used

Variable coil scrap cost = scrapped heat pump coils × replacement cost per coil × scrap cost charged to this scope
Total coil scrap cost = variable coil scrap cost + fixed scrap handling and disposition cost

Inputs explained

Scrapped heat pump coils:
Replacement cost per coil:
Scrap cost charged to this scope:
Fixed scrap handling and disposition cost:

How to use the result

Use it when building a cost-of-quality case, justifying leak-detection or brazing-process upgrades, or allocating coil scrap to a specific product line or cost center.
It treats replacement cost per coil as a single blended figure; if you mix small reversing-valve coils and large evaporator coils, run them separately or your variable cost will be distorted.

Current U.S. benchmarks

Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate coil scrap cost? Multiply the number of scrapped coils by the replacement cost per coil and by the share charged to this scope, then add the fixed handling and disposition cost. With 14 coils at $950 each at 100% scope plus $800 fixed, that is $13,300 variable plus $800, or $14,100 total.
Why include a scope percentage instead of just counting coils? The scope percentage lets you allocate scrap that is partly caused by upstream tube-mill defects or shared between product families. Setting it to 100% charges the full coil value to this line; a lower value splits responsibility.
What is a good coil scrap rate for heat pump assembly? Mature finned-tube coil lines typically run 1-3% scrap after braze and pressure test. Above 5% usually points to a brazing fixture, flux, or leak-test calibration problem worth chasing.
Should disposition and handling cost really be separate? Yes. Cutting copper and aluminum for recycling, transport, paperwork, and rejected-material tracking are largely fixed per batch and do not scale linearly with coil count, so they belong in the fixed term.
Does the replacement cost include brazing labor? It should. Use the full loaded cost to replace the coil — raw copper and aluminum, fins, fittings, braze alloy, and the skilled labor hours — not just the bill of materials. A bare-material number understates the loss.

Last reviewed 2026-05-12.