Bosch Tronic 3500 Flat TR3501T 100 DERB — Slim Electric Water Heater, 100 l
Bosch Tronic 3500 Flat TR3501T 100 DERB — Slim Electric Water Heater, 100 l
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Delivery time: approx. 2 weeks
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Shipping & delivery
Shipping & delivery
Shipping within the EU is free from €100 order value — below that, the exact cost is shown at checkout; unfortunately we cannot deliver to islands.
Delivery time: items in stock usually arrive in approx. 4–6 business days; otherwise approx. 4–8 business days, for Bosch units currently approx. 8–11 business days. For split air conditioners and heat pumps containing F-gas, the delivery time counts from receipt of the certified-installer documents.
Compact units ship as parcels; large split and multi-split units ship by freight carrier with advance phone notice — kerbside delivery. Please check the shipment for visible transport damage on acceptance and note it with the driver.
Warranty & invoice
Warranty & invoice
You buy original goods with the full manufacturer warranty. Every order comes with an invoice showing VAT.
Withdrawal & returns
Withdrawal & returns
Consumers have a 14-day right of withdrawal. You will find all details in the withdrawal policy — you can declare withdrawal directly via the withdraw from contract page.
Old appliance take-back (§ 17 ElektroG)
Old appliance take-back (§ 17 ElektroG)
When you buy a new appliance of the same type, we take back your old electrical appliance free of charge. We ask you about this in the cart — for freight deliveries we coordinate collection or return with you.
Old appliances do not belong in household waste (crossed-out wheelie bin symbol). They contain recyclable and sometimes hazardous materials — separate collection protects health and the environment.
Manufacturer information
Manufacturer information
Manufacturer:
Bosch Thermotechnik GmbH
Sophienstraße 30-32
35576 Wetzlar
Deutschland
Email:
info.thermotechnik@de.bosch.com
The Bosch Tronic 3500 Flat TR3501T 100 DERB is a slim electric water heater with a 100-litre tank — developed for tight spaces. At only ~26 cm deep it fits in the kitchen, hallway or bathroom, where a classic cylindrical water heater will not. Electronic display, intelligent thermostat, dry heating element and ErP energy class B.
Key features
| Model | Bosch Tronic 3500 Flat TR3501T 100 DERB |
|---|---|
| Tank capacity | 100 l |
| Heating capacity | 1500 W |
| Design | Slim-flat (~26 cm depth) |
| ErP energy class | B |
| Warranty | 5 years (tank) |
Construction & electronics
| Tank | Glass-enamelled steel |
|---|---|
| Corrosion protection | Magnesium sacrificial anode |
| Heating element | Dry heating element (in a sleeve) |
| Display | Electronic with setpoint display |
| Thermostat | 30–75 °C |
| Operating modes | Normal / Eco (weekly timer) / Frost protection |
| Insulation | High-density polyurethane foam |
| Protection class | IPX4 |
| Max. operating pressure | 8 bar |
| Max. temperature | 75 °C |
Tronic 3500 Flat at a glance
Bosch Tronic 3500 Flat
The slim 26 cm depth is the standout feature — the Bosch Flat range fits where round water heaters will not. Inside: a dry heating element (no limescale build-up on the element), a glass-enamelled steel tank with a magnesium anode and high-density polyurethane foam for ErP class B. Electronic display with eco mode and a weekly timer.
Installation & operation
Vertical wall mounting. Reversible connections bottom-right (DERB = Dry Element Right Bottom). 230 V single-phase power supply. Wall brackets included; depth ~26 cm fits standard wall recesses.
About Bosch Home Comfort
Robert Bosch GmbH was founded in 1886 in Stuttgart. Bosch Home Comfort offers proven German engineering and European reliability for hot water, heating and air conditioning — backed by a manufacturer's warranty.
Frequently asked questions
Why a flat water heater?
The Tronic 3500 Flat is only ~26 cm deep — slim enough for kitchen recesses, hallway cupboards or above the washing machine. Same heating output as a round water heater with 30 % less depth.
Who is the 100 l version for?
The 100 l Tronic 3500 Flat is suitable for 1–4-person households. As a point-of-use supply in the kitchen, 50 l is typical; for a family bathroom, 80 l or 100 l.
What is a “dry heating element”?
A dry heating element sits in a sealed sleeve and never touches the water. The result: no limescale on the element, a longer service life, and the element can be replaced without draining the tank.
How is the tank protected against corrosion?
Glass-enamelled steel tank with a magnesium sacrificial anode. Check the anode every 2–3 years (sooner with hard water) and replace it when worn.
How long is the warranty?
Bosch provides 5 years on the tank and 2 years on the electrical components — with professional installation and anode maintenance.
Technical data
| Model | Tronic TR3501T 100 |
|---|---|
| Energy efficiency class | B (scale A+++ to D) |
| Power (kW class) | ≤ 2.5 kW |
| Colour | White |
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