HRV 1.75 Q Plus

Mechanical Ventilation with Heat Recovery unit (MVHR) BUY NOW

 For use in small to medium sized dwellings

HRV 1.75 Q Plus MVHR UnitThe enhanced capacity HRV1.75 Q Plus continuously running whole house ventilation unit with heat recovery is independently tested by the BRE and remains ultra compact in size despite its results.

Combining extremely low power consumption and a highly efficient heat exchanger, this unit enhances SAP performance via Appendix Q, and yet remains versatile enough in size to be equally as functional in larger apartments as it is in small to medium sized dwellings.
The Eco versions offer a 100% airflow diverting Summer Bypass, recognised and listed in the UK Product Characterists Database. They also include intelligent humidity options and can be fitted with the auralite® status indicator or the aurastat® controller.

Features & Benefits

  • Highly versatile compact unit
  • Extremely low Specific Fan Power of 0.41 W/l/s
  • Highly efficient heat exchanger; up to 91%
  • Accepts 125mm or 150mm diameter ducting, no adaptors required
  • Intelligent frost protection, stepped reduction of supply air rates prevents HRV unit from freezing
  • G3 filters as standard, G4 as an option 
  • Fully adjustable boost overrun timer 0-60 minutes; can be used with non-latching (momentary) switches to prevent unit from being accidently left in boost mode
  • Setback facility to reduce ventilation where local regulations allow
  • Summer Mode facility as standard
  • Volt free switching control
  • Intelligent controller, quick and easy to commission
  • Lightweight for easy handling
  • Re-usable plastic filter frames
  • Quick fix mounting bracket
  • Patented
  • Independent fan adjustment
  • Effective in reducing pollutants in the home and improving Indoor Air Quality (IAQ), therefore reducing the risk of Toxic Home Syndrome

Basic version;

  • Summer Mode

Eco versions;

  • Intelligent Summer Bypass & humidity controls
  • SUMMERboost® facility

Eco HMB Models;

Eco B Models;*

  • Compatible with aurastat® controller.
  • Duct heater control (requires independent power supply)
  • Available in left and right handed configurations

* European model

For explanations of HRV features, click here.

For further details specific to this product, please see the manuals; TP404A, TP404HMB and TP414B.






System 4



Exhaust Terminal
Fan Speed
Specific Fan
Efficiency (%)
Kitchen + 1 additional wet room 100% variable 0.41 91
Kitchen + 2 additional wet rooms 100% variable 0.42 90
Kitchen + 3 additional wet rooms 100% variable 0.49 90
Kitchen + 4 additional wet rooms 100% variable 0.59 89
Kitchen + 5 additional wet rooms 100% variable 0.73 88
Kitchen + 6 additional wet rooms 100% variable 0.90 88

Figures taken from the BRE Test Results.

*Number of wet rooms is based on SAP Q test criteria and does not correlate directly with regulatory performance requirements.

Noise Performance  - click here for the acoustic test results.

Performance of Eco versions may differ slightly and are available on request.



Product Code

HRV1.75 Q Plus - TP404A - Energy Rating A
HRV1.75 Q Plus HMB Eco auralite® ready - TP404HMB - Energy Rating A
HRV1.75 Q Plus B Eco aurastat® ready - TP414B - Energy Rating A+
XP40132/099 - G3 Filters fitted as standard
XP46122/099 - G4 Filters fitted on request
Eco versions:
XP40133/099 - G3 Filters fitted as standard
XP46133/099 - G4 Filters fitted on request


Conforms to requirements of UK statutory Building Regulations and Technical Standards for Ventilation and BRE 398
SAP Appendix Q tested
Exceeds requirements of Building
Regulations Approved Document L
(England & Wales)
EU RoHS Directive compliant
Conforms to requirements of EC council
directives relating to Electromagnetic
Compatibility and Electrical Safety: 2006/95/EC (LVD)
2004/108/EC (EMC)
EN 60335-1:2002/A2:2006
EN 60335-2-80:2003/A1:2004
CE Marked.    
Other non-UK info available on request


Dimensions: 715mm wide x 490mm high (excluding ports) x 415mm deep (426mm with mounting bracket)
Weight: 24kg
Finish: White Paint
Housing: Zintec sheet steel housing,
powder coated white
Internals: Expanded polypropylene (EPP)
Heat Exchanger: Polystyrene
Internal insulation: Closed cell foamed
Nitrile rubber, class ‘O’ fire rating
Standard filters: Grade G3 synthetic
, flame resistance to BS5588
Guarantee period: 3 years (UK only)
Electrical: 230V ~ 50/60Hz, 3A fuse
Installation: Install in accordance with
Good Practice, such as the Domestic
Ventilation Compliance Guide (England &
Wales) and the Residential Ventilation
Association recommendations Maintenance: Service and filter clean/replacement subject to local environment - see Product Manual

More information / 01206 713800

HRV1.75 Q Plus Performance Graph

Nominal fan performance


Nominal fan performance - Eco Versions

All units offer 100% variable speed control.
*@FID (0 Pa)