London's climate engineers

Sub Zero Climate was founded by a qualified HVAC engineer who was tired of seeing customers let down by poor workmanship and pushy upselling. The idea was simple: build a company that gives honest advice, installs systems properly, and stands behind its work.

Over a decade later, we've grown into a trusted name across London and the South East — but the founding principle hasn't changed. Every job, whether it's a single domestic split unit or a full commercial refrigeration fit-out, gets the same level of care and attention.

We're fully certified across all the disciplines we work in: Gas Safe registered, F-Gas certified, REFCOM Elite registered, and MCS certified for heat pump installations. When we say the job is done right, we mean it.