Doesn't using CO₂ contribute to climate change?

The CO₂ used in cleaning is recovered from existing industrial processes (mostly fertiliser and ethanol production). It would otherwise be vented to atmosphere — using it as a cleaning medium doesn't add new CO₂.

What about the energy used in compressed air?

There's an energy cost to running the compressor. It's offset against the energy cost of heating water for steam cleaning, the embodied energy of cleaning chemistry, and the disposal energy for waste from chemical or abrasive media cleaning.

Is it safe to breathe?

In open or well-ventilated spaces, yes. CO₂ concentrations stay well below the 5,000ppm long-term exposure limit. In confined spaces we monitor and ventilate.

Safety

Is Dry Ice Cleaning Environmentally Friendly? A Real Answer

An honest look at the environmental footprint of dry ice cleaning compared to chemical, water-based and abrasive cleaning methods.

By Dry Ice Blasters 6 min read Published 25 April 2026

The marketing version of “dry ice cleaning is environmentally friendly” is true enough on the surface but skips the actual numbers. Here’s the honest version.

The CO₂ question

The most common objection: “Aren’t you just releasing CO₂ into the atmosphere?”

Yes. About 99% of the dry ice mass becomes CO₂ vapour during cleaning.

But the CO₂ wasn’t manufactured for cleaning. It’s recovered from other industrial processes — primarily fertiliser production (ammonia plants) and ethanol fermentation. These processes already produce CO₂ as a byproduct that, without recovery, would be vented straight to the atmosphere. Capturing it for use as a cleaning medium adds a secondary use before it’s released — but it doesn’t release more CO₂ than would otherwise have been emitted.

In carbon-accounting terms, dry ice cleaning is carbon-neutral over its life cycle. The CO₂ would have been released anyway; it just gets a second use first.

Compared to alternatives

The real environmental story is the comparison.

vs Steam cleaning

Water: Steam cleaning uses 50–200 litres per typical engine bay job. Dry ice uses none.
Detergent: Steam typically uses detergent. Detergent ends up in stormwater unless captured. Dry ice uses no chemistry.
Energy: Steam requires water heating, which is energy-intensive. Dry ice requires compressor power, which is also energy-intensive but generally less so.
Disposal: Detergent run-off requires capture for marina / industrial sites. Dry ice produces no liquid waste.

vs Chemical cleaning

Inventory: Chemical cleaning requires storage of (often hazardous) chemistry. Dry ice doesn’t.
Disposal: Chemical waste requires hazardous-waste disposal. Dry ice produces only the captured contamination plus CO₂ vapour.
Operator exposure: Chemical cleaning involves operator exposure to alkaline / acid agents. Dry ice involves operator exposure to cold and CO₂ — both manageable through standard PPE.
Carry-over risk: Chemical cleaning has rinse-and-validate cycles. Dry ice has none.

vs Sandblasting / abrasive media

Media use: Sandblasting uses kilograms of media per square metre, all of which becomes contaminated waste. Dry ice uses pellets that sublimate.
Disposal: Sandblast media + captured contamination requires hazardous disposal in many cases. Dry ice produces only the captured contamination.
Surface damage: Sandblasting damages the substrate. Dry ice doesn’t. Saved substrate = saved replacement = saved embodied energy of new materials.

vs Pressure washing

Water: Pressure washing uses 200–500 litres per typical wash. Dry ice: zero.
Run-off: Pressure washing run-off carries contamination to stormwater unless captured. Dry ice has no run-off.
Energy: Water pumping is less energy-intensive than compressed air, but the volume of water used (and embodied energy of treating that water) shifts the balance.

What dry ice doesn’t help with

A few honest limitations:

The pellets themselves require energy to produce. Refrigerating CO₂ to solid form takes electricity — typically grid electricity in Australia, with the carbon intensity of the local grid mix. We use about 25–60kg of dry ice per typical engine bay job; the production carbon cost of that is small but not zero.
The compressor uses fuel or electricity. Diesel-fuelled portable compressors are typical for mobile work. Electric compressors are an option for stationary work.
Transport. Mobile work means crew travel. Same as any service business — we minimise it through scheduling but it’s there.

The biggest environmental win

It’s not the cleaning process itself — it’s the substrate preservation.

Dry ice cleaning saves materials that would otherwise be replaced:

Timber framing in fire / mold restoration
Heritage masonry on facades
Mould tooling in manufacturing
Engine components in restoration
Equipment in flood recovery

The embodied energy of those materials — the carbon cost of cutting, transporting, milling, processing, distributing, fitting — is vastly larger than the carbon cost of the cleaning itself. Saving even a portion of that materials replacement is the real environmental story.

Bottom line

Dry ice cleaning is the lowest-impact non-abrasive cleaning method available for the job profiles where it’s appropriate. It’s not zero-impact — nothing is. But the comparison against the alternatives, especially when factoring in the substrate preservation, is strongly in dry ice’s favour.

The honest summary: it’s not the cleaning method we’d recommend for your driveway. It is the cleaning method we’d recommend for the inside of your engine bay, the timber framing of your fire-damaged warehouse, or the heritage stone of your council building.