• Energy efficient with up to 90% heat recovery
  • Designed for air flow rates of 100-300 m3/h
  • Quiet operation
  • Low power operation
  • Replaces indoor air with filtered fresh air from outside
  • Passive House Institute certified component
  • Quick cooling effect via night ventilation function
  • Pollutants are removed from indoors
  • Prevents dust and pollen build up
  • Prevents condensation and mould through improved ventilation
  • Easily accessible design for filter replacement
  • FEQ air quality sensor (optional accessory)
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Product Overview

Passsive House Certified Component
Passive House Certified Component

This appliance has been independently tested and certified by the Passive House Institute.

The LWZ 170 E PLUS uses a cross current design to effectively recover the heat in the air indoors as it exchanges this with fresh air from outdoors. The LWZ 170 E PLUS is ideal for low energy buildings and passive homes.

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Product Details

The LWZ 170 E PLUS delivers up to 90% heat recovery and provides a pleasant ambiance in detached houses. The ventilation system even has a bypass function that uses cooler temperatures overnight to help cool the home down.

Technical Data

Model number LWZ 170 E PLUS
Power consumption 13-251 W
Rated voltage 240 V
Air volume flow 100-300 m3/h
Protection level to VDE IP31
Max ambient temperature 60�C
Filter class G3
Air duct connection 160 mm
PE condensate drain connection 13 mm
Weight 35 kg
Height 602
Width 675
Depth 535
Sound pressure level tested 1 metre from the unit in accordance with EN255T7

33dB (A) at 100 m3/h 40Pa

43.5dB (A) at 150 m3/h 80Pa

51.5dB (A) at 225m3/h 160Pa


File Category Type Download
LWZ 170 E-370 Plus DatasheetData SheetPDF
685.50 kB
LWZ 170 E Operation and Installation GuideOperation and Installation GuidePDF
5.21 MB
Heat Recovery Ventilation WarrantyWarrantyPDF
124.48 kB
Certified Passive House Component - LWZ 170 ECertificatePDF
162.55 kB
Condensate drain connectionTechnical DrawingPDF
102.62 kB
LWZ 170 Plus Tech Line DrawingTechnical DrawingJPEG
132.18 kB
LWZ 170 E Plus RFA FileCAD DataRFA
852.00 kB


1. What size ventilation system do I require?

STIEBEL ELTRON has a specification team that can assist you with the selection of a ventilation system and ducting configuration based on your building plans.

2. What is the ducting connection on an LWZ 170 E PLUS?

The LWZ 170 E PLUS has extract and supply air connections of 160 mm diameter.

3. Can the LWZ 170 E PLUS be installed outdoors?

No, the LWZ 170 E PLUS is designed to be installed indoors.

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