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Bathroom Ventilation System Through Roof Using In-Line Fan

A bathroom ventilation system, installed with a roof-mounted exhaust using an in-line fan. Suitable for a single room, and a duct run of up to 3m.

Key Features
  • Pre-packaged System: Hometech have done the work for you
  • Smart Installation: Roof penetrations often offer the path of least resistance for ducting, which in turn leads to more efficient performance from fans
  • BRANZ Appraised roof penetration — Appraisal No. 665 [2017]
  • Quieter performance: Remote mounted fans mean the noise and vibration is further away from the occupant, not at the perimeter of the space
  • Peace of mind: backed up by a 10 year leak proof guarantee
  • Exceeds Healthy Homes requirement for bathroom or laundry ventilation
  • Intermittent extraction, single speed, with wall switch control
  • Optional: timer, humidity sensor
Scope of Use
  • Single room intermittent extraction for wet rooms
  • Roof mounted exhaust using an in-line fan

Ideal for:

  • Bathrooms, toilets, laundries


  • Diameter: 150mm 
  • Minimum clearance: 200mm
  • Duct run: up to 3m
  • Fire protection available that is compliant to AS/NZS 15304.4:2014
Limitations on Use
  • Minimum of 200mm between ceiling and roofline is required
  • Sufficient replacement air is required for extract efficiency
  • Ceiling diffuser to be located as close to outside edge of shower enclosure where applicable. For shower over bath, diffuser to be as close to centre of bath
  • Duct should not be squished or taken around tight bends
  • Allow roof access for future maintenance
  • All fans to be connected to an isolating switch as per AS/NZS 3000:2018
Statement of Building Code Compliance

Meets the following provisions of the NZBC:

  • B2: Durability
  • E2: External Moisture
  • G4: Ventilation

Healthy Homes:

  • Extraction air volume exceeds or meets 25l/s for bathrooms, and/or 40l/s for laundries

BRANZ Appraised roof penetration:

  • Appraisal No. 665 [2017]


  • Fire protection available that is compliant to AS/NZS 15304.4:2014
Other Performance Attributes
  • Air Flow: 40l/s
  • Noise: 49dB(A)
  • Power: 50W 


  • 10 year leak proof guarantee
  • 10 years for materials and workmanship
  • 1 year fan motor warranty

Terms and conditions apply.

BRANZ Appraised
BRANZ Appraised
HTBKTRIL: Bathroom Kit Through Roof using In-Line Fan
BRANZ Appraisal 665: Roof Penetrations

Appraisal No. 665 [2017]

CAD/PDF Details
Ceiling Outlet 150
Inline Fan 150 3m
Roof Vent 250 150

Hometech, the ventilation specialists, have been helping Kiwis for over 30 years to create healthier homes.

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