Stiebel Eltron SH 15 SL GB Unvented Small Water Heater

Stiebel Eltron SH 15 SL GB Unvented Small Water Heater

The Stiebel Eltron SH 15 SL GB Unvented Small Water Heater is a compact high‑pressure storage solution engineered to supply reliable domestic hot water (DHW) to one or multiple draw‑off points directly from the mains. Designed for oversink or undersink installation, this pressurised small cylinder is ideal for kitchens, bathrooms and utility areas where consistent hot water under mains pressure is needed without a traditional full‑size cylinder.

With a 15 litre capacity and robust construction, the SH 15 SL GB provides a flexible hot water option for homes and commercial spaces. Its unvented design means it can work with standard pressure taps, and it performs well for washbasins, showers and adjacent sinks when correctly installed with the required safety assembly.

Key Features

• Compact 15 litre unvented hot water cylinder designed to operate at mains pressure

• Suitable for multiple draw‑off points with high pressure taps and appropriate safety kit

• Variable temperature range (approx. 35 °C – 82 °C) with frost protection when off

• High grade thermal insulation to reduce energy losses

• Pressurised construction eliminates need for vented taps and enables conventional mixer taps

• Supplied with wall mounting bracket, metal water connections and cable storage convenience

• IP24 D splash‑proof rating suitable for bathroom and utility installation environments

Heating Performance and Operation

The SH 15 SL GB unvented water heater stores hot water in its 15 litre high‑pressure cylinder, heating quickly with a 2 kW electric element. Once up to temperature, the unit delivers hot water at mains pressure to one or more outlets such as washbasins or small showers, making it more versatile than traditional vented point‑of‑use heaters.

Its high grade enamelled steel cylinder offers durability and long service life, while integrated insulation keeps standby heat losses to a minimum. Adjustable temperature settings give installers flexibility on site, and frost protection helps guard against cold conditions during periods of non‑use.

Because this is an unvented appliance, installation must include a compliant safety assembly kit as required by building regulations. This ensures safe operation under mains pressure and supports connection to standard mixer or pressure taps without special low‑pressure restrictions.

Additional Technical Details

• Nominal capacity: 15 litre

• Rated power: 2 kW at 230 V

• Installation type: Oversink or undersink high‑pressure

• Inner cylinder material: Enamelled steel

• Temperature range: approx. 35 °C – 82 °C

• Protection rating: IP24 D

• Energy efficiency class: A

• Weight: approx. 10.7 kg

What’s in the Box

• Stiebel Eltron SH 15 SL GB unvented small water heater

• Wall mounting bracket

• Metal water connection fittings

• Cable storage provision

• Installation and user instructions

Summary

The Stiebel Eltron SH 15 SL GB Unvented Small Water Heater delivers pressurised hot water from a compact 15 litre cylinder, making it ideal for kitchens, bathrooms and utility areas with one or more outlets. With strong thermal insulation, flexible temperature control and compatibility with conventional mains pressure taps, it is a robust choice for residential and light commercial hot water needs where space is limited and conventional unvented performance is desired.