Welcome to RefTech Ltd

RefTech Ltd is a privately owned company based in Christchurch New Zealand. We design, install and commission industrial refrigeration systems, including ammonia and CO2 refrigerants. We also work with steam, hot water, chilled water and secondary refrigerants like glycol. Our clients include Alliance Group Ltd, Silver Fern Farms Ltd, Goodman Fielder and AFFCO to name a few. We have contracted from Bluff to Northland. Our extensive knowledge and practical experience of industrial refrigeration systems has allowed us to develop innovative and effective solutions for the particular problems experienced in this industry. Our innovative design, improved value for money and high standards of installation, helps set us apart from other companies.


RefTech Ltd takes the safety of its staff and contractors very seriously. Our project engineering staff and foremen are all permit receiver qualified to ensure we work with our clients as safely as possible and to integrate into their site safety systems as seamlessly as possible.

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Our Capabilities 

Ammonia Refrigeration System Engineering & Design

RefTech is the recognized industry leader in the design and engineering of ammonia refrigeration systems. Our in-house ammonia refrigeration engineers, designers and contracting field specialists work closely with clients to deliver innovative and energy-efficient systems that exceed expectations. 

Problem Solving

We are able to investigate the performance of the refrigeration system and advise on means of reducing power usage, improving compressor optimisation or just in removing bottle-necks in the plant to allow them to operate to their full potential.



Reftech"s HVAC installation and commissioning experience spans across a variety of applications including food, cold storage and meat processing. Our engineers know how to adhere to all safety codes and requirements to get our clients’ HVAC systems running at the utmost efficiency. Our team is experienced in all types of duct work, design and installation.