H+H Celcon Aircrete Block

Name: H+H Celcon Aircrete Block
Brand: H+H Celcon

Autoclaved aerated concrete (aircrete) block — a lightweight structural masonry block for inner leaves, load-bearing walls and partitions, combining structure with insulation. Declared per m³ (770 kg/m³, ~1/3 the weight of dense block). Module B1 shows significant CO₂ re-absorption (carbonation) over the 60-year service life; the biogenic figure reflects timber packaging.

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Carbon and evidence

Product Evidence

Evidence currently held for the H+H Celcon product record.

H+H Celcon

Recorded Carbon Result

163kgCO₂e/m³

A1–A3 GWP-total per declared unit, per EPD

Indicator: GWP-total

H+H Celcon Aircrete Block Environmental Product Declaration · EN 15804+A2 core environmental impact indicators

A1–A3 covers raw-material supply, transport to manufacture and manufacturing. It is product-stage information, not a whole-life result.

Environmental Product Declaration

EPD recorded

Coverage: Representative product
Declared unit: 1 m³ (770.79 kg)
Programme: EPD Hub
Registration: EPD Hub HUB-1545
Standard: EN 15804+A2
Valid until: 2029-06-06
Verification: Third-party verified

H+H Celcon Standard Grade aircrete blocks (multiple products/factories average); declared per 1 m³ at 770.79 kg. Cradle-to-grave (A1–A3, A4, A5, B1, C1–C4, D).

Read the EPDSource: EN 15804+A2 core environmental impact indicators

Carbon profile

kgCO2e per 1 m³ (770.79 kg) · each bar starts at zero · local scale

A1-A3 product

163

A4-A5 site*

44.2

B use

-82.4

C end of life

10.6

D reuse / recycling

-4.14

adds carbon stores or removes EPD scenario* reuse/recycling potential (D)

* EPD transport and installation scenario, not this project's. Module D shows potential impacts or benefits from reuse, recovery or recycling after the product's assessed life. It is reported separately and never added to A-C. Do not compare bar lengths between materials. Each chart may use a different scale and declared unit.

Reported GWP Modules

Displayed as stored; modules are not added together here.

A1–A3

163 kgCO₂e

per 1 m³ (770.79 kg)

A4*

6.13 kgCO₂e

per 1 m³ (770.79 kg)

A5*

38.1 kgCO₂e

per 1 m³ (770.79 kg)

-82.4 kgCO₂e

per 1 m³ (770.79 kg)

2.55 kgCO₂e

per 1 m³ (770.79 kg)

2.82 kgCO₂e

per 1 m³ (770.79 kg)

5.18 kgCO₂e

per 1 m³ (770.79 kg)

0.0791 kgCO₂e

per 1 m³ (770.79 kg)

-4.14 kgCO₂e

per 1 m³ (770.79 kg)

* A4/A5 are EPD scenarios, not project-specific results. Module D is outside the A–C system boundary and is not added to A–C. Module nomenclature follows BS EN 15978 / EN 15804. Declared values are suitable as inputs to a whole life carbon assessment under the RICS Professional Standard (2nd edition); this panel is not an assessment.

Upfront Carbon (A1–A5)*

207 kgCO₂e per 1 m³ (770.79 kg)

A1–A3 163 + A4 6.13 + A5 38.1 · GWP-total, as declared

* Includes the EPD’s A4/A5 scenario assumptions, not project-specific transport or installation. This is the aggregation the proposed Part Z applies upfront limits to. The A1–A3 figure includes declared biogenic storage of -24.8 kgCO₂e; Part Z aggregates upfront carbon excluding sequestered carbon, which is the assessor's adjustment to make.

Service Life — the B4 Replacement Input

100 years · EPD reference service life

≈1 installation over a 60-year building study period.

B4 (replacement) follows the building, not the product: an assessor multiplies replacement cycles by project quantities. This record supplies the service life and does not compute B4.

Sourced Product Claims

Third-party verified EPD (EPD Hub, EN 15804+A2)Third-party verifiedSource

Evidence Sources

H+H Celcon Aircrete Block Environmental Product Declaration

EPD Hub · EN 15804+A2 core environmental impact indicators

Coverage: H+H Celcon Standard Grade aircrete blocks (multiple products/factories average); declared per 1 m³ at 770.79 kg. Cradle-to-grave (A1–A3, A4, A5, B1, C1–C4, D).

Third-party verified

Comparison Status

The record contains the basic metadata required for a controlled comparison. Products must still perform the same function and use compatible units, PCRs and lifecycle scope.

Design & Specification Notes

Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.

Autoclaved aerated concrete (aircrete) block — a lightweight structural masonry block for inner leaves, load-bearing walls and partitions, combining structure with insulation.

Typical Uses

•Primary frame
•Long-span elements
•Load-bearing supports

Key Performance

High load-bearing capacity for primary frame.

Specification Actions

•Specify GGBS/PFA cement replacement (target: 50%+ replacement).
•Request EPD showing embodied carbon per m3.
•Calculate transport distances for primary materials.

Indicative Health & Indoor Air

low Risk

Inert aircrete; cutting-dust precautions when sawing blocks.

Evidence:Third-party verified

Specification

Range: Celcon Standard Aircrete
Collection: Masonry & Blockwork
Finish: Autoclaved aerated concrete (aircrete) block
Service life: 100 years