21 October 2025
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Advertorial
STIEBEL ELTRON have launched the LWZ 07.1 Premium HKL 230 as part of their hpnext generation of heat pumps which also includes new monobloc air source and ground source units.
Billed as a “plant room in a box” the new unit offers heating, cooling, ventilation and air purification out of the box, whilst taking up minimal floorspace.
Hot water provision just requires the addition of your choice of hot water cylinder to match your project, allowing for maximum comfort and space and energy efficiency.
Cooling as standard through the emitter system (underfloor and fan coils) but also via. the MVHR with the addition of an accessory fitted neatly to the top of casing, so that no additional footprint is required in your plant room (see installed image).
Behind the elegant casing of the LWZ lies the latest technology for top‑class efficiency. Heat in the extract air (that is usually wasted in standard MVHR systems) is used to increase efficiency of the Heat Pump, defrosting processes are minimized and energy requirements are reduced to an absolute minimum. A preheat of the fresh air using a byproduct of energy from the Heat Pump system further elevates the efficiency of the ventilation system.
As well as integration of Solar PV/ Thermal systems the LWZ is compatible with energy management systems for
photovoltaic integration to increase efficiencies even further.
Installers will be glad of the flexible installation options (right or left‑handed) and the quick installation of the outside and exhaust air ducts using hose sets with adapter plates.
The LWZ 07.1 offers a heat output at A‑7/ W35 (EN 14511) of 6.42 kW and cooling capacity at A35/W7 of 2.69 kW. It can achieve heat recovery up to 92% and supply an air/exhaust air volume flow of 80‑300 m³/h. At a sound power level (EN 12102) of 50 dB(A) it delivers whisper‑quiet operation and the advantage of no outdoor equipment being needed.
www.stiebel-eltron.co.uk/hpnextlaunch
