Ovens and cooktops with ovens: a guide to choosing (electric or gas)

Ovens and cooktops with ovens: a guide to choosing (electric or gas)

Buying a built-in oven or a freestanding cooker seems simple — until you start comparing sizes , capacity in liters , ventilation (convection) , pyrolytic cleaning , consumption and, in the case of gas, installation and inspections .

Below you have a "Google-ready" guide, designed for those who shop in Portugal and want to get it right the first time.

1) Built-in oven vs. stovetop with oven: which makes more sense?

Built-in oven

  • It integrates into the furniture (under the countertop or at eye level).

  • Ideal for modern kitchens and for use with a freestanding cooktop.

  • Generally, you have more function options (fan, grill, probe, assisted steam, etc.).
    Bosch sums up the types well: built-in oven vs. freestanding cooker (hob + oven in a single appliance).

Stovetop with oven (freestanding cooker)

  • "2 in 1": stovetop + oven in the same appliance.

  • Great for quick replacements in traditional kitchens.

  • It can be electric , gas , or a combination (gas hob + electric oven / or vice versa).

2) Measurements and fitting: the number one mistake is not measuring correctly.

Before choosing a model and functions, confirm the dimensions of the niche/cutout :

  • Standard size: 60 × 60 cm (width × height)

  • Compact: 60 × 45 cm

  • XL/XXL: larger sizes for specific needs.

➡️ UMBOX Tip: If you're replacing an old oven, use the old manual or measure the cutout — small differences can complicate installation.

3) Capacity (liters): How many liters do you really need?

On the label and in the technical specifications you will see the capacity in liters . It is one of the factors that most influences everyday convenience (roasts, large trays, two serving dishes, etc.).

The European Commission itself includes volume (L) as one of the main fields on the oven label.

4) Heating: “conventional” vs. “ventilated” (convection)

When comparing, focus on these two methods:

  • Conventional (top and bottom heat, no fan)

  • Fan-forced/convection : a fan circulates the hot air, cooking faster and more evenly.

✅ For many people, a fan oven is worthwhile: it offers better uniformity in cakes, pizzas, multi-tray dishes, and roasts.

5) Oven energy label: how to read it (without guesswork)

Energy labelling for ovens in the EU is defined in Delegated Regulation (EU) 65/2014 , which includes electric and gas ovens (including those incorporated into cooktops) .

Class scale

For ovens , the revised scale is A+++ through D.

What the tag shows (the 3 numbers that matter)

On the oven label (electric example), the European Commission highlights:

  • Volume (liters)

  • Consumption per cycle in conventional mode (kWh/cycle)

  • Energy consumption per cycle in fan mode (kWh/cycle)

EPREL / QR code

The label has a QR code: scanning it will take you to EPREL , the official EU database with more data on the model.

✅ Practical UMBOX rule (for the customer to decide quickly):

  1. Compare kWh/ventilated cycle , 2) confirm liters , 3) choose the best energy class within your budget.

6) Cleaning: pyrolytic, catalytic, or "eco/steam clean"?

Pyrolytic (high temperature self-cleaning)

It's the "premium" option for those who hate scrubbing: the oven heats to very high temperatures and turns dirt into ash. Siemens describes the process: up to ~480°C , burning grease and residue before wiping with a cloth.

✅ Recommended if:

  • very hot cooking (roasts, fats),

  • You want simpler maintenance.

Catalytic (panels that help absorb fat)

It tends to help during use, but it usually doesn't replace occasional, more manual cleaning (it depends on the model and the type of dirt).

7) Electric oven or gas oven? (and gas stove with oven)

Electric

  • Very common for built-in installation.

  • More features and fine-tuned temperature control.

  • The label shows consumption in kWh/cycle (conventional and ventilated).

Gas (gas oven / gas stove with oven)

  • The cost per liter of energy may be lower depending on the tariff.

  • It is critical to ensure proper installation and ventilation .

Safety and compliance in Portugal (an important point for UMBOX)

In Portugal, the installation/alteration/maintenance of gas appliances must be carried out by an authorized Installation Entity (EI) , which issues a declaration of conformity when installing or working on gas appliances.
The inspection for the start of supply (when applicable) is carried out by an Inspection Entity (EIG) and verifies, among other points, installation, operation and ventilation conditions.

✅ Short text (recommended) for your UMBOX “Installation” page:

"The installation of gas stoves and ovens must be carried out by authorized entities (EI) and may require inspection by an EIG, in accordance with applicable regulations."

8) Quick checklist before buying (perfect for converting)

1) Type: built-in or stovetop with oven
2) Dimensions: 60×60 or 60×45 (compact)
3) Liters: actual capacity for your use
4) Vented: preferable for uniformity
5) Cleaning: pyrolytic if you want "zero stress"
6) Energy label: class A+++–D and kWh/cycle (conventional and ventilated)
7) If gas: installation by EI + inspection/safety requirements

9) Tips for saving energy when using the oven

The European Commission recommends simple habits:

  • cooking more things “at once”,

  • keep the door closed,

  • defrost beforehand.

  • Preheat only when the recipe calls for it.

  • Use fan mode whenever possible.

  • Turn it off before the end of the cycle and take advantage of residual heat.

FAQ

Which is better: a fan oven or a conventional oven?
Fan-assisted (convection) cooking tends to cook faster and more evenly; the EU itself distinguishes between consumption per cycle in the two modes on the label.

How do I read the energy label on my oven?
See the class (A+++–D) and compare the consumption per cycle in conventional and ventilated systems , as well as the volume in liters.

Is pyrotechnics worth it?
If you cook a lot and want easy maintenance: pyrolytic cleaning heats the oven to very high temperatures (e.g., ~480°C) and reduces residue to ash.

Gas stove with oven: do I need a technician?
In Portugal, the installation/intervention of gas appliances must be carried out by an authorized installation entity (EI) and may involve inspection by an EIG, depending on the case.