Founded and operated by trade-qualified practitioners. We don't guess sizes or just hang boxes on walls—we engineer reliable climate control, low-cost heating, and critical cold storage for Auckland homes and commercial sites.
Hands-on Experience
Completed Installs & Jobs
Form 12A BWoF Sign-Off
Owned & Operated
"A heat pump isn't just a wall feature—it's a precision refrigeration circuit. If you don't calculate heat loss, purge copper lines with dry nitrogen, and pull a deep vacuum below 500 microns, you aren't doing trade work; you're just hanging boxes."
— Dee Thilakarathna, Director & Marine Engineer
Over 20 years ago, Dee Thilakarathna started DJR Refrigeration with a simple, unyielding rule: do the job once, do it right, and never cut corners on engineering integrity.
Bringing a robust background as a Marine Engineer alongside more than two decades of hands-on industry experience on the tools, Dee has personally designed, installed, and serviced thousands of climate systems across New Zealand. His deep sea-to-land engineering expertise spans everything from complex residential high-walls and full-home ducted retrofits to heavy commercial coolrooms and council-mandated mechanical ventilation plant.
Our operations are led by experienced trade practitioners and dedicated project managers committed to prompt dispatch and technical accuracy.
Director & Lead Marine Engineer
Directs technical site inspections, marine refrigeration engineering, complex HVAC plant design, and quality assurance across Auckland.
Sales & Operations Manager
Manages client project estimations, commercial quotes, scheduled maintenance contracts, and operational workflow dispatch.
We hold ourselves to strict trade standards so your climate and refrigeration systems perform reliably year after year.
As registered Independent Qualified Persons (IQPs) with Auckland Council, we carry out mandatory Building Warrant of Fitness (BWoF) inspections for mechanical ventilation systems (SS9). We sign off Form 12A compliance certificates so commercial building owners stay fully compliant with the NZ Building Code.
We carry out actual heat loss calculations before putting a quote together. Our team measures room volume, ceiling stud heights, insulation R-values, and window solar aspect. You pay for the exact thermal capacity (kW) your building needs—no undersized units that frost up in winter, and no sales fluff pushing oversized gear you don't need.
Whether you own your home or manage a portfolio of rentals, our heat pump and ventilation installations meet MBIE requirements for heating output, dampness control, and draught-stopping under the NZ Healthy Homes Standards.
Our mobile service vans are strategically stationed across key Auckland zones for quick dispatch, scheduled servicing, and emergency breakdown response.
| Region | Suburbs Covered |
|---|---|
| Central & City | Ponsonby, Grey Lynn, Parnell, Newmarket, Epsom, Mount Eden |
| North Shore | Takapuna, Devonport, Albany |
| East & South | Remuera, Howick, Botany, Manukau, Papatoetoe |
| West | Henderson |
Speak directly with Dee, Jamie, and our engineering team. We evaluate site layout, inspect switchboard spare breaker capacity, map line-set runs, and deliver clear, itemised trade quotes completely free of charge.
Provide your layout details below and a trade engineer will get back to you shortly.