Two heat pump tumble dryers rated 9 kg, two different brands, 57.22 euros apart. We at PortosEunostos downloaded the EU product fiches of the Siemens WQ45G2C0IT and the Bosch WQB245B0IT and laid them side by side, line by line. Out of twenty-four comparable entries, exactly one is different, and it is not the one you would expect. Here is what you are really paying for.
The two EU fiches are the same document
The product fiches required by Delegated Regulation (EU) 2023/2534 are the documents a manufacturer must publish by law, carrying the values measured on the eco programme. Both models carry the same date, 21 September 2026, and these figures.
| Parameter | Siemens WQ45G2C0IT | Bosch WQB245B0IT |
|---|---|---|
| Rated capacity | 9.0 kg | 9.0 kg |
| Energy efficiency index | 60.0 | 60.0 |
| Energy class (A-G scale) | C | C |
| Energy per cycle | 1.10 kWh | 1.10 kWh |
| Condensation efficiency | 88% (class B) | 88% (class B) |
| Programme time, full / half load | 3:15 / 2:05 | 3:15 / 2:05 |
| Noise | 61 dB(A), class B | 61 dB(A), class B |
| Dimensions (HxWxD) | 842x598x613 mm | 842x598x613 mm |
| Refrigerant | R290 | R290 |
| Price recorded on 13/10/2026 | 973.93 euros | 916.71 euros |
This is not a resemblance, it is an overlap. Same consumption to the hundredth of a kWh, same programme time to the minute, same decibel, same millimetres. Siemens and Bosch belong to the same industrial group, and here the family ties are plain to see, exactly as in our comparison of the two brands on washing machines.
The only measured difference: two watts
Read the table to the very bottom and the single mismatching number turns up. Under networked standby the Bosch declares 2.00 W, while the Siemens leaves the cell empty. That is not an oversight: the Bosch carries the Home Connect module, connects to your Wi-Fi and talks to the washing machine to suggest the right drying programme. The Siemens, in this version, is not connected.
In other words, the line that tells the two machines apart does not measure performance, it measures an extra feature. And that feature, once the Wi-Fi is on, draws power even when the machine is drying nothing at all.
What permanent Wi-Fi actually costs you
Let us do the maths, method in the open. Off mode on both is 0.30 W; the Bosch in networked standby climbs to 2.00 W, that is 1.70 W more for 8,760 hours a year, or 14.9 kWh. At the Italian ARERA tariff for the fourth quarter of 2026, 0.4343 euros per kWh, that works out at 6.47 euros a year.
It sounds like nothing until you line it up against the price. The 57.22 euros you save by buying the Bosch are eaten by networked standby in eight years and ten months. Over a ten year service life the balance flips: 64.68 euros of standby against 57.22 euros of initial discount. For scale: drying three loads a week on either machine burns 171.6 kWh, that is 74.53 euros a year, so an always connected module adds 8.7% to your drying bill. The good news is that the Bosch manual explains how to switch the module off: with Wi-Fi disabled you are back to 0.30 W and the saving stays intact. For the full tariff picture, we keep it updated in our piece on what it costs to run your appliances today.
What changes outside the label
If the EU fiche does not separate the two machines, the manufacturer spec sheet does. The Siemens iQ500 brings smartFinish, the steam treatment that according to the maker cuts creases by up to 50% and shortens ironing time, with two dedicated programmes for one and for five shirts, plus the Outdoor, Hygiene and Speed40 programmes, the iQdrive motor and duoTronic sensors.
The Bosch Serie 8 answers with Home Connect and SmartDry (it picks the programme on its own, based on your last wash cycle), downloadable app programmes, HygienePlus, Rapid 40 min and Sport/Fitness, a reversible door hinge and a delicates basket as an accessory. Structurally they are twins: 600 W power draw, 145 cm cable, self cleaning condenser, LED drum light, 120 minute anti crease phase. A few grams change (56.1 against 56.7 kg) and three millimetres of depth with the door open.
One detail that matters if you stack them in a column: the stacking kits are not interchangeable. The Siemens takes codes WZ27400 or WZ27410, the Bosch takes WTZ27500 or WTZ27510. If you already own a washing machine from one of the two brands, the choice is almost made for you. How to install and look after them is in our guide to choosing a tumble dryer and in the reminder on how often to clean the filter and the condenser.
Repairability and warranty: a dead heat
Nothing to choose here either. Both declare repairability class A with an index of 9.43 and the same four sub scores: 9.18 on disassembly depth, 9.11 on fasteners, 10.00 on tools and 10.00 on repair information. Same minimum warranty of 24 months and the same group spare parts price list. This is the figure that will go straight onto the label from 2027: we covered it when writing about the repairability class on the energy label and about the real price of spare parts.
The A+++ trap on retail spec sheets
Watch out for a line still doing the rounds on plenty of retail sheets: the Siemens WQ45G2C0IT is listed as class A+++. Its own EU fiche, updated in September 2026, says C. That is not a measurement error, it is an obsolete scale: since 1 July 2025 Delegated Regulation (EU) 2023/2534 has moved tumble dryers back onto the A-G scale and the classes with plus signs no longer exist. The rule we always apply is simple: when two lines disagree, the official manufacturer fiche wins. If you want to practise reading them, start from how to read the energy label.
PortosEunostos tips
What to check on the product. Always open the EU product fiche before you pay: it is the PDF the manufacturer publishes by obligation and it carries energy per cycle, programme time, noise and repairability. Check that the class shown in the shop listing matches the one on the fiche, verify the stacking kit code if you plan a column, and look at the depth with the door open, not just with it closed.
How to judge the seller. On an appliance close to a thousand euros, delivery time is part of the price: here the Bosch ships immediately while the Siemens is quoted at 15 to 20 working days. Check that shipping is included, that the seller handles returns and that the 24 month warranty is the manufacturer one. Always compare at least two offers before you commit.
Which one to buy
If you simply want clothes dried, take the Bosch: identical performance, 57.22 euros less, immediate delivery and, if you do not need the Wi-Fi, you switch it off and keep the whole saving. If instead you iron a lot and steam saves you half an hour a week, the 57 euros on the Siemens are money well spent, because smartFinish is the one thing the Bosch does not have. What you should not do is pay the difference believing you are buying a better machine: on paper, and on the paper that counts, they are the same machine.
You can compare current prices for both models in the tumble dryer category on OpportunityCommerce, where you will find the Siemens WQ45G2C0IT listing and the Bosch WQB245B0IT listing, or keep an eye on live heat pump dryer offers with the SniffaPrezzi comparison tool.
Sources
EU product fiches for the Siemens WQ45G2C0IT and the Bosch WQB245B0IT, both dated 21/09/2026
Energy labelling of tumble dryers: Delegated Regulation (EU) 2023/2534, consultable through the European product registry EPREL and the Bosch energy label page
Prices and availability recorded on OpportunityCommerce on 13/10/2026; Italian electricity tariff, ARERA fourth quarter 2026
Worth reading too: our full analysis of the Bosch WQB245B0IT, 8 or 9 kg tumble dryer and how much it costs to use a tumble dryer in a year.
