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Continuous Extract System Through Roof with In-line Fan for 1-4 Rooms

A continuous extraction system installed with a roof-mounted exhaust with an in-line EC fan. Suitable for up to four rooms, including bathrooms and laundries, along with bedrooms, and living spaces.

Key Features
  • Pre-packaged System: Hometech have done the work for you
  • Energy Efficient Motor: The Continuous Extract Series use EC motors for low power usage and longer life spans so they can stay on all the time
  • 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. Hometech also use acoustic duct to bring the noise down even further for continuous applications
  • Continuous extraction, full speed control
  • Optional: timer, humidity sensor
Homestar / Green Star (Envirospec) Compliant
Homestar / Green Star
Scope of Use
  • Multi-room continuous extraction for always on ventilation

Ideal for:

  • Typically from bathrooms or other wet rooms but can be straight from bedrooms and living spaces
  • Fresh air volume suitable for:
    • up to ~100-200m² house (1-3 Rooms)
    • up to ~100-150m² house (4 Rooms)


  • Roof mounted system installed with proprietary roof flashing (BRANZ Appraisal 665) and vent cap
  • Fire protection available that is compliant to AS/NZS 15304.4:2014
  • Diameter:
    • 150mm (1-3 Room)
    • 150-200mm (4 Room)
  • Duct Run:
    • 1 Room: Up to 3m (acoustic duct)
    • 2-3 Rooms: Up to 3m per run (acoustic duct), maximum 6m separation between rooms
    • 4 Rooms: Up to 3m per run (acoustic duct), maximum 10m separation between furthest rooms
  • Roofline Clearance:
    • 1 Room: Minimum of 350mm between ceiling and roof line is required
    • 2-4 Rooms: Minimum of 500mm between ceiling and roofline is required
Limitations on Use
  • Sufficient replacement air is required for extract efficiency. Replacement air can be achieved through undercut to doors of all rooms, 20mm minimum on bathrooms, 10mm on bedrooms
  • Passive vents or other background ventilation should be supplied in air tight homes to deliver the replacement air into the house
  • 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
  • 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:

  • 1-2 Rooms: Extraction air volume exceeds 25l/s for bathrooms, and/or 40l/s for laundries
  • 3 Rooms: Extraction air volume exceeds 25l/s for bathrooms


  • Fire protection available that is compliant to AS/NZS 15304.4:2014

BRANZ Appraised roof penetration:

  • Appraisal No. 665 [2017]
Other Performance Attributes
  • Homestar: v5 6 Stars
  • Air flow:
    • 1 Room:>70l/s
    • 2 Rooms: >40l/s 
    • 3 Rooms: >25l/s
    • 4 Rooms: >10l/s
  • Noise: 40-50db(A) at 3m (fan motor low-high speed)
  • Power: 40W


  • 10 Year Leak proof guarantee
  • 10 Years for materials and workmanship
  • 1 Year fan motor

Terms and conditions apply

BRANZ Appraised
BRANZ Appraised
HTCETRIL1R: Continuous Extraction Through Roof —1 Room
HTCETRIL2R: Continuous Extraction Through Roof — 2 Rooms
HTCETRIL3R: Continuous Extraction Through Roof — 3 Rooms
HTCETRIL4R: Continuous Extraction Through Roof — 4 Rooms
BRANZ Appraisal 665: Roof Penetrations

Appraisal No. 665 [2017]

CAD/PDF Details
Ceiling Outlet 150
Ceiling Wall Fan 150LV
Ceiling/Wall Fan 150
Inline Fan 150 3m
Inline Fan 150 6m
Inline Fan 150 EC
Roof Vent & Roof Fan
Roof Vent & Roof Fan 200
Roof Vent 250 150
Roof Vent 250 200
Splitter 150 150/150
Splitter 200 150/150
Splitter 200 150/150/150

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

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