Frequently Asked Questions
Frequently Asked Questions
Everything you need to know about Prenox equipment, services, and support.
General Information
General Questions
Prenox manufactures a comprehensive range of industrial catering and commercial kitchen equipment, including convection ovens, modular cooking equipment, heating cabinets, food warmers, proving cabinets, sink units, trolleys, and custom-built catering solutions. All equipment is designed and manufactured in South Africa.
Prenox has been manufacturing commercial catering equipment since 1996 and has built a reputation for supplying reliable, durable equipment throughout South Africa.
All Prenox equipment is manufactured in South Africa, allowing for faster support, readily available spare parts, and shorter lead times.
Prenox equipment is used in restaurants, bakeries, hotels, hospitals, schools, universities, old age homes, mining operations, corporate canteens, and food production facilities.
Yes. In addition to our standard product range, we design and manufacture custom catering equipment tailored to your specific operational requirements.
Convection Oven FAQs
Prenox manufactures convection ovens ranging from 4-pan units through to 40-pan industrial ovens, suitable for operations of all sizes.
Convection ovens use a fan to circulate hot air evenly throughout the cooking chamber, resulting in faster cooking times, more even baking, improved product consistency, lower operating temperatures, and reduced energy consumption.
A Prenox convection oven can reduce cooking time by approximately 20% while operating at temperatures up to 25% lower than a conventional oven.
Yes. The even airflow helps maintain consistent temperatures throughout the oven, allowing multiple trays of similar products to be baked at the same time.
Yes. Selected Prenox oven models are available in both gas and electric configurations.
Yes. Many Prenox convection ovens are available with steam injection systems to improve baking results and product quality.
Various tray sizes are available depending on the model selected. Our team can recommend the most suitable configuration for your operation.
Modular Equipment FAQs
Modular equipment consists of individual cooking appliances that can be combined to create a custom cooking line, including fryers, griddles, boiling tables, pasta cookers, and workstations.
Yes. Modular systems are designed to allow future expansion as your kitchen grows.
Yes. Most modular equipment can be supplied in either gas or electric versions.
Both installation configurations are available depending on your kitchen layout.
Installation & Training FAQs
Yes. Professional installation services are available and can be quoted as part of your project.
Yes. Prenox provides operational training to ensure your team can safely and effectively use the equipment.
Yes. Our team can assist with kitchen planning, equipment selection, workflow optimisation, and project implementation.
Yes. We can supply equipment, coordinate installation, provide commissioning, and support your team through project completion.
Warranty & Support FAQs
Most Prenox equipment is supplied with a 12-month warranty against manufacturing defects, subject to the warranty terms and conditions.
The warranty covers manufacturing defects and faulty components under normal operating conditions.
The warranty generally excludes: incorrect installation, abuse or misuse, poor maintenance, electrical supply issues, normal wear and tear, and unauthorised modifications.
Contact our service department with the equipment model and serial number. Our technicians will assist with troubleshooting and arrange repairs if required.
Yes. Prenox offers rapid breakdown response services and maintenance plans for customers who require priority support.
Yes. Prenox supports customers throughout South Africa through our service network.
Spare Parts FAQs
Yes. Because Prenox manufactures its own equipment locally, genuine spare parts are readily available.
We strive to maintain spare parts support for equipment long after the original purchase date.
Yes. Contact our service department with your model and serial number for assistance.
In many cases, yes. One of the benefits of locally manufactured equipment is long-term support availability.
Maintenance FAQs
Preventative maintenance should typically be performed every 6 to 12 months depending on usage.
Yes. Prenox offers preventative maintenance plans tailored to your operational requirements.
Regular servicing extends equipment life, reduces breakdowns, improves energy efficiency, maintains food quality, and reduces costly downtime.
Yes. Prenox can perform equipment inspections and provide supporting documentation for compliance requirements.
Sales & Purchasing FAQs
You can request a quotation through our website, email, or by contacting our sales team directly.
Quotation validity is indicated on each quotation, typically 30 days unless otherwise stated.
To help us recommend the best solution, please provide: type of operation, number of meals produced daily, available utilities (gas/electricity), kitchen dimensions, and budget requirements.
Financing options may be available through approved finance partners.
Lead times vary depending on stock availability and customisation requirements. Our sales team will confirm delivery schedules when quoting.
Why Choose Prenox?
Prenox offers local manufacturing, faster support, immediate spare parts availability, South African expertise, lower lifecycle costs, and equipment designed specifically for local operating conditions.
Our equipment is designed by experienced engineers, manufactured locally, thoroughly tested, and supported by dedicated service teams who understand the demands of commercial kitchens.
Technical — For Chefs & Kitchen Managers
Cooking Performance
The correct oven size depends on: number of meals produced daily, peak production periods, product type, available kitchen space, and future growth plans. As a general guideline, operations producing less than 200 meals per day may be suited to a 4 or 6-pan oven, while larger operations may require 10, 20, or 40-pan units.
Common causes include: incorrect loading patterns, overloading the oven, incorrect temperature settings, opening the door too frequently, poor maintenance of door seals, and faulty temperature probes. Regular servicing and correct operating procedures usually resolve consistency issues.
For optimum airflow, trays should not be overloaded and adequate spacing must be maintained between products. Overloading can restrict airflow and lead to uneven cooking.
Yes, provided the products require similar temperatures and cooking times. Strongly flavoured products should generally be separated to avoid flavour transfer.
The circulating fan continuously moves hot air across the product surface, improving heat transfer and reducing cooking times compared to static ovens.
As a general guideline, reduce temperatures by approximately 15°C to 25°C when moving recipes from conventional ovens to convection ovens.
Uneven browning can result from: incorrect tray placement, blocked airflow, damaged fan systems, excessive loading, and incorrect baking temperatures.
Baking & Bakery Operations
Steam improves crust development, product volume, moisture retention, product appearance, and shelf life. It is particularly beneficial for breads, rolls, pastries, and artisan products.
Possible causes include: underproofing, overproofing, incorrect baking temperature, excessive steam, and dough formulation issues.
Yes. Aluminium trays are commonly used and provide excellent heat transfer for most bakery applications.
Adequate spacing should be maintained to allow unrestricted airflow around products. This ensures even baking and maximum oven efficiency.
This may be caused by: uneven proofing, uneven loading, blocked airflow, dough inconsistencies, and incorrect baking temperatures.
Food Safety & Compliance
Hot food should generally be maintained above 63°C in accordance with food safety best practices.
Critical cooking and holding temperatures should be checked and recorded regularly as part of HACCP procedures.
Yes. Prenox equipment is widely used in facilities operating under HACCP and food safety management systems.
Typical records include: temperature logs, cleaning schedules, maintenance records, service reports, and calibration certificates where applicable.
Accurate temperature monitoring helps ensure food safety, maintain product consistency, meet regulatory requirements, and reduce waste.
Energy Efficiency
Recommended practices include: avoiding unnecessary preheating, keeping oven doors closed, regular equipment maintenance, proper loading techniques, and using correctly sized equipment for production requirements.
Yes. Because convection ovens cook faster and at lower temperatures, they can reduce energy consumption compared to conventional ovens.
Door seals play a critical role in maintaining temperature, reducing heat loss, improving efficiency, and reducing cooking times. Damaged seals should be replaced promptly.
Where operationally possible, equipment should be switched off when not required to reduce energy consumption and component wear.
Equipment Care & Maintenance
Daily cleaning is recommended to prevent grease build-up and maintain performance.
Use approved commercial food-service cleaning products. Avoid highly abrasive materials that may damage stainless steel surfaces.
For most operations: moderate use — every 12 months; heavy use — every 6 months; high-production facilities — as recommended by the service department.
Common indicators include: uneven cooking, longer cooking times, temperature fluctuations, unusual noises, excessive energy consumption, and door seal deterioration.
Operators can perform routine cleaning and visual inspections. Technical servicing should be carried out by qualified technicians.
Troubleshooting
Possible causes include: heating element failure, voltage issues, faulty controls, damaged door seals, and excessive carbon build-up.
Possible causes include: faulty heating elements, wiring faults, moisture ingress, and damaged electrical components. A qualified technician should investigate immediately.
Possible causes include: blocked water supply, closed isolation valve, scale build-up, and faulty steam components.
This may indicate: worn bearings, loose fan blades, motor wear, or foreign object interference. The unit should be inspected as soon as possible.
Common causes include: excessive cooking temperatures, excessive cooking times, insufficient steam, and incorrect recipe conversion from conventional ovens.
Kitchen Planning & Operations
Adequate clearance should be maintained for ventilation, cleaning access, service access, and safe operation. Our team can provide model-specific installation requirements.
Important factors include: workflow efficiency, production volume, staff movement, ventilation requirements, utility availability, and future expansion plans.
Production capacity depends on: equipment size, cooking cycle times, number of operating hours, product type, and labour availability. Prenox can assist with capacity calculations during the planning stage.
In many cases, yes. Selecting equipment with reasonable expansion capacity can reduce future capital expenditure and disruption.
Best practices include: preventative maintenance, staff training, maintaining critical spare parts, regular inspections, and prompt reporting of faults.
Expert Advice
Purchasing based solely on price rather than lifecycle cost. The true cost of equipment includes reliability, energy efficiency, spare parts availability, productivity, and service support.
Regular cleaning, preventative maintenance, and proper operator training have the greatest impact on equipment longevity.
With proper maintenance, commercial catering equipment can provide reliable service for 10 to 20 years or more.
Local manufacturing provides: faster support, readily available spare parts, local technical expertise, reduced downtime, and better long-term value.