HIES

Also known as Home Insulation and Energy Systems, Home Insulation and Energy Systems Contractors Scheme, HIES Consumer Code, HIES Quality Assured Contractors Scheme

HIES (Home Insulation and Energy Systems) is a consumer-protection scheme for businesses installing renewable energy and home energy efficiency products in domestic properties.

HIES (Home Insulation and Energy Systems) is a CTSI (Chartered Trading Standards Institute) approved consumer-code scheme for businesses that install renewable energy and home energy efficiency products in domestic properties. A HIES reference can point to member rules, installer accreditation, deposit or stage-payment protection, insurance-backed guarantees, advice, mediation and ombudsman access. It is separate from MCS certification, TrustMark registration, Building Regulations approval, DNO notification or approval, grant eligibility, product warranty cover, export-tariff registration, EV chargepoint approval and proof that a specific installation is suitable or correctly designed.