Passivate Energy & Sustainability Ltd

PASSIVATE Energy & Sustainability Limited is a specialist building‑energy consultancy dedicated to helping architects, designers, contractors and developers deliver compliant, low‑energy buildings. Founded in 2010 by Andrew Lundberg, PASSIVATE is the longest‑established independent member of the NSAI Thermal Modellers Scheme and offers a friendly, no‑nonsense approach to navigating the complexities of Nearly Zero‑Energy Buildings (NZEB) and Building Regulations Part L.

The firm’s core services include thermal‑bridge assessments, U‑value calculations and condensation‑risk analysis, all underpinned by NSAI‑accredited thermal modelling. PASSIVATE also provides building surveyance, sustainability assessments, and window and curtain‑wall certification (BFRC), supported by a team of certified Passive House designers, hygro‑thermal assessors, building‑fabric consultants and HPI‑qualified sustainability advisers. By marrying rigorous technical expertise with clear, non‑technical communication, they reduce risk, control cost and enhance efficiency throughout the design and construction process.

PASSIVATE’s client portfolio spans commercial developments, housing projects, public‑sector buildings, schools, colleges and student residences, reflecting a commitment to strong partnerships and the delivery of high‑performance,