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Sustainable building services for ARCHITECTS, SELF-BUILD and DEVELOPERS/BUILDERS. Low Carbon Box are accredited assessors and consultants for energy assessments, Passivhaus, air tightness testing, Planning energy statements and more.

Air Tightness Testing - Self Build House
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Eco Build Property
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PassivHaus learn More
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Over Glazed Extensions learn More
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Planning Energy Statements learn More
SAP Calculations
SAP Calculations learn More
SBEM energy_assessments
SBEM Energy Assessment learn More
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Extract Fan Testing learn More
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Water Calculations learn More
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Projects / Blogs

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Blog
Air Tightness Testing Example
Low Carbon Box provide an overview of an air tightness testing example so you can see what to prepare...
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Blog
Essex Eco House Air tightness...
Low Carbon Box were recently commissioned to carry out the Essex Eco House Air Tightness Test. The client an...
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Blog
Air Tightness Testing issues
Through our regular on site air tightness testing, we come across 4 main air tightness testing issues for failure:
Blog
Passivhaus SIPs system air tightness...
Low Carbon Box are the Passivhaus Consultants on the 13 Passivhaus units development at Sharnbrook, Bedfordshire. The Passivhaus SIPs system air tightness...
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Blog
Social Housing Scheme achieves Passivhaus...
The 2 houses at Kyme Road, Heckington social hosing scheme achieves Passivhaus certification. Low Carbon Box were the Passivhaus Certified Consultants...
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Blog
Condensation Risk in Barn Conversion...
A site visit last year to a friends recent barn conversion with a barrel roof highlighted the condensation risk...