A single deck oven has one baking chamber. A double deck oven stacks two chambers, each with its own door, on one footprint. Choose single deck if you bake one product at a time, have limited space or are starting out. Choose double deck if you bake two products at different settings, or need more output without using more floor area. The rest of this guide sets out the differences in capacity, workflow, power, installation and cost, so that you can decide against your own menu and kitchen.
TL;DR
- A single deck oven suits low to moderate volume, one product at a time and a lower purchase cost.
- A double deck oven gives two independent chambers in one footprint, so two products can bake at different temperatures at once.
- Check the electrical load or LPG arrangement before you buy. Both affect whether a unit can be installed in your premises.
- Compare quotes on the full cost: delivery, installation, ventilation, servicing and electricity, not only the unit price.
- Energy cost depends mainly on how fully and how steadily you use the oven, not only on the number of decks.
Table of Contents
- What single deck and double deck mean
- Capacity and batch workflow
- Side-by-side comparison
- When a single deck oven suits your business
- When a double deck oven is more practical
- Energy use and running cost in Singapore
- Space, power, gas and ventilation checks
- Budgeting and comparing quotes
- Our perspective
- See the ovens in person
- FAQ
- Sources
What single deck and double deck mean
A “deck” in a commercial oven is one baking chamber. Each chamber has its own door, its own heating elements or burners and, on most models, its own temperature control. The product sits on a deck floor (stone, steel or ceramic) or on trays placed on it.
- Single deck: one chamber. Some models have an extra-tall chamber, and some hold several trays on shelves inside it.
- Double deck: two chambers stacked vertically. They sit on a stand or on a base with wheels.
- Triple deck and above: the same principle with more chambers. These are used in high-volume bakeries.
The usual alternative to a deck oven is a convection oven, where a fan moves hot air around trays. If you are still deciding between those two types, read our guide to the deck oven versus convection oven choice. This article assumes you have already settled on a deck oven and are choosing the number of decks.
Capacity and batch workflow
Capacity is the first question. A double deck oven does not give twice the oven for twice the room. It gives two chambers in the floor area of roughly one, which is why kitchens with fixed space often consider it first.
The practical effect is on workflow:
- One product, one batch at a time. A single deck oven works well. You load, bake, unload and reload.
- Staggered batches. With two decks you load the second chamber while the first is baking. Output is steadier through a service period.
- Two products with different settings. Bread, pastries, pizza and cakes often need different temperatures. Separate chambers let you bake them together without compromise.
- Peak periods. A double deck oven gives you spare capacity when orders are heaviest. You can also leave one chamber off in quiet periods.
A single deck oven has one weak point: while it is baking, it is occupied. If you must change the temperature for the next product, you wait for the chamber to heat or cool. That wait is the main reason bakeries with a varied menu move to two decks.
Temperature control
Each chamber on a double deck oven normally has independent control. This matters for consistency. A single chamber opened often loses heat, and the next batch starts from a lower temperature. With two chambers you open the door of one while the other holds its setting.
Side-by-side comparison
| Criterion | Single deck oven | Double deck oven |
|---|---|---|
| Number of chambers | One | Two, stacked |
| Floor space | Smallest footprint of the two | Similar footprint, more height |
| Products at different temperatures | One at a time | Two at once |
| Output at peak times | Limited by one chamber | Higher, with staggered loading |
| Purchase cost | Lower | Higher |
| Power or gas connection | Smaller load | Larger load to check before purchase |
| Best for | Start-ups, small cafes, one core product | Bakeries, restaurants with several baked items, growing businesses |
The table is a guide to configuration. Actual capacity, tray size and power rating differ by model, so read each product’s specification.
When a single deck oven suits your business
A single deck oven is a sound choice in these cases:
- You are opening a new food business and want to keep capital outlay controlled.
- Your kitchen is small and the oven must fit beside prep tables and refrigeration.
- You bake one main product, such as pizza, and the volume is moderate.
- Your electrical supply or gas arrangement has limited spare capacity.
- You want a unit that is simple to operate, clean and service.
For pizza specifically, we stock a single deck pizza oven for kitchens that need one reliable chamber.
When a double deck oven is more practical
A double deck oven makes more sense in these cases:
- You bake two or more products with different temperature needs.
- Orders arrive in peaks, for example catering batches or morning bakery trade.
- You expect volume to grow and do not want to replace the oven in a short time.
- Floor space is fixed, but ceiling height allows a taller unit.
- You want a spare chamber so that production continues during a cleaning or minor fault in the other.
Our range includes a double deck oven, a double deck gas oven and a double deck gas oven with wheels, which is easier to move for cleaning. A second double deck oven listing is also available. Check each product page for its current specification.
Energy use and running cost in Singapore
The number of decks is only one factor in your electricity bill. Three things matter more.
1. The tariff. From 1 October 2026 the electricity tariff for non-households in Singapore is 28.59 cents/kWh before GST. Check the same page for the rate that applies when you read this.
2. The oven’s rated power. One published test of a modular electric deck oven recorded a rated electrical input of 7.5kW. Ratings vary by model, so use the figure on your own unit’s data plate.
3. How the oven is used. The National Environment Agency advises food manufacturers to select equipment on operating efficiency rather than capital cost and to run equipment close to its maximum capacity. The guide is written for food manufacturing plants, but the principle applies to any kitchen: a half-empty oven wastes energy.
A worked illustration
Take an oven rated at 7.5kW that draws its full rating for 4 hours. That is 30kWh. At 28.59 cents/kWh before GST, the electricity is about S$8.58 before GST. This is an upper-bound illustration, because ovens cycle their heating once at temperature. Use your own unit’s rating, hours and tariff to repeat the sum.
The lesson for the single or double decision:
- A double deck oven that is full on both decks makes better use of the heat than a single deck oven that is half full.
- A double deck oven used with one chamber idle, and the idle chamber switched off, costs less to run than leaving both on.
- A double deck oven that is far larger than your volume will cost more to heat than you need.
For ways to lower oven consumption without new equipment, see our guide on commercial oven energy consumption.
Space, power, gas and ventilation checks
Do these checks before you order, not after delivery.
Space and access
- Measure the installed width, depth and height, including the stand or wheels.
- Allow clearance around the oven for heat, service access and cleaning. The manufacturer’s manual states the minimum distances.
- Measure the door, lift and corridor that the unit must pass through. A double deck oven is taller and heavier than a single deck.
- Confirm the floor can carry the weight.
Electrical supply
Get the rated load from the product specification and ask your licensed electrician whether your premises can carry it with your other equipment. In Singapore, non-domestic electrical installations with an approved load above 45kVA need a licence from the Energy Market Authority, and the owner or user must appoint a licensed electrical worker. A larger oven, or a second deck, adds to that total load.
Electric commercial ovens are also covered by a safety standard. IEC 60335-2-36:2021 deals with the safety of electrically operated commercial cooking and baking ovens, within its stated scope. Ask the supplier which standards a given model is tested to.
Gas supply
If you choose a gas model, the installation must follow the rules. Commercial LPG installations must meet the SCDF Fire Code requirements, which include ventilation, leak detection and fire-resistant compartmentation for cylinders. Use a qualified contractor. Our article on gas installation rules in Singapore explains why gas work must not be done informally, and our SCDF kitchen fire safety checklist covers the wider kitchen.
Ventilation
An oven adds heat to the kitchen, and two decks add more of it. Check that your extraction and make-up air are sufficient. Our guide to kitchen ventilation requirements in Singapore lists the points to confirm with your landlord and contractor.
Budgeting and comparing quotes
A double deck oven costs more to buy than a single deck oven. The gap is only part of the full cost. Ask each supplier to quote the items below in writing so that quotes can be compared line by line.
- Unit price, with the model, number of decks, tray size and power or gas type.
- Delivery and positioning, including any lift or crane charge.
- Installation, including electrical or gas work by licensed workers, and any permit or inspection.
- Ventilation changes, if your existing extraction is not sufficient.
- Accessories, such as stands, trays, stone decks, steam or timers, if not included.
- Warranty and servicing, covering the period, what is excluded and who attends.
- Spare parts availability, since an oven that is out of use stops production.
- Running cost, estimated from the rated power or gas use and your baking hours.
Two checks prevent common mistakes. First, compare quotes for the same configuration: a double deck quote and a single deck quote answer different questions. Second, compare running cost over several years, not only purchase price. A lower-priced oven that is wrong for your volume costs more over time.
Our perspective
We supply commercial kitchen equipment to restaurants, caterers, food manufacturers and new food businesses in Singapore. In our experience of how these businesses buy, the question “single or double?” is usually a question about product mix and growth, and less often about budget alone.
We suggest asking three things. What do you bake now, and at what temperatures? How many batches do you need in your busiest hour? And what will you bake in two years? If the answers include more than one temperature, or volume you expect to grow, a double deck oven gives you two independent chambers in one footprint. That is why we carry electric and gas double deck models, including a version on wheels for easier cleaning.
We also advise buyers to look at efficiency at the point of purchase. Our products are chosen with energy efficiency in mind, and some energy-efficient equipment may qualify for government grants. Eligibility depends on the scheme and on your business, so confirm the current terms with the grant agency before you buy, and ask us which models we can support with the documents you need.
— David
See the ovens in person
Our ovens are listed in the oven and bakeware collection, and you can see the range at our showroom. Bring your layout, your intended menu and your electrical or gas details, and we will go through single deck and double deck options against them.
For a fast-cooking alternative, see our Merrychef high speed oven. Prices are not published online, so request a quotation for the model you are considering.
FAQ
Is a double deck oven twice as expensive to run as a single deck oven?
Not necessarily. Running cost follows rated power or gas use and the hours the oven is on. A double deck oven draws more than a single chamber when both decks are heating, but if both are full the energy per item baked can be reasonable. Switch off an idle chamber and check the data plate rating against the current tariff.
Can I bake two different products at once in a double deck oven?
Yes, in most models. Each chamber has its own door and temperature control, so you can bake bread in one and pastries in the other. Check the model’s specification to confirm independent controls.
Does a double deck oven need a three-phase electrical supply?
It depends on the model and its rated load. Read the specification, then ask a licensed electrical worker whether your premises can carry it. Where total approved load exceeds 45kVA, the EMA licensing rules apply.
Is a gas or electric double deck oven better for a Singapore kitchen?
Neither is better in every case. Electric units depend on your electrical capacity. Gas units need an LPG arrangement that meets SCDF Fire Code requirements. Choose according to what your premises can support and what your landlord permits.
What is the difference between a deck oven and a convection oven?
A deck oven heats the product from a baking floor, which suits bread and pizza. A convection oven moves hot air around trays, which suits trays of pastries and cookies. Our comparison guide sets out the differences.
Sources
- Electricity Tariff Singapore, SP Group
- Deck oven test report, SCE Design and Engineering Services
- Best Practice Guide for Improving Energy Efficiency of Food Manufacturing Plants, NEA
- Clause 10.1 LPG Cylinder Installations, SCDF Fire Code 2023
- Electrical/Supply Installation Licences, EMA
- IEC 60335-2-36:2021, Singapore Standards eShop