Do hydrogen cylinders used in a heat treatment furnace count in Scope 1?

Using hydrogen gives no CO2 at your site, so there is nothing for Scope 1 from the hydrogen itself. The emissions are upstream, where it was made, usually from natural gas. Count those in Scope 3 Category 1 using the supplier figure or a factor per kg of hydrogen.

What to record

• Cylinders or kg of hydrogen bought, from invoices.
• The supplier production route, if they share it.
• Any other gas mixed in, such as nitrogen.

Where Scope 1 still appears

If the furnace also burns natural gas or LPG for heat, or burns off a carbon-bearing atmosphere, that fuel is Scope 1.

What Senseible does here

Senseible reads bills, fuel invoices and production records into dated, fingerprinted records, so the figure you send a buyer can be traced to its documents.

• Industrial gases in Scope 3
• SMR hydrogen per kg
• Induction vs furnace hardening

Sources: GHG Protocol Corporate Standard, GHG Protocol Scope 3 Standard, 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Last reviewed 2026-10-23.