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HRV4.25 Q Plus

Mechanical Ventilation with Heat Recovery unit (MVHR)

HRV4.25 Q Plus: a powerful yet compact, continuously running whole-house ventilation unit with heat recovery. It is suitable for larger dwellings and has been independently tested by the BRE. The HRV4.25 Q Plus delivers cutting-edge performance usually only associated with much larger and more expensive products.

The combination of very low power consumption and a highly efficient heat exchanger is specifically designed to enhance SAP performance via Appendix Q, yet small enough to be easily incorporated into medium sized dwellings.

Recognised and listed in the UK Product Characteristics Database and includes intelligent humidity options through controller options.

TP423HMB,TP423HMB_LT,TP433B2,TP433B2_T

Features & Benefits

Extremely low Specific Fan Power; down to 0.43 W/l/s
Highly efficient heat exchanger; up to 91%
Airflow up to 158 l/s (568 m3/h) at 100 Pa
Accepts 150mm and 160mm diameter ducting, no adaptors required

HMB and B2 Models

IP32 rating
Boost Overrun Timer
Boost Inhibit
Internal Humidity Sensor
Filter Change Alert
Four Fan Speeds
SUMMERboost®
Summer Bypass
Volt Free Switch Inputs (x3)
Frost Protection Program
Multiple Internal Temperature Sensors
Left or right handing onsite option available (delivered as LH as standard
On-Board and Off-Board Control Options (please refer to controls product page for more information)

B2 Models (only)

Dwelling Supply Air Comfort Control (reduces the amount of cold air being supplied to dwelling)
Dwelling Supply/Extract Protection
Balanced Frost Protection
Live Switch Inputs (x2)

Technical Information

Product Codes and Specific features

Product Codes and Specific Features

HMB Models:

Product Model	Product Code	Energy Rating
HRV4.25 Q Plus - HMB	TP423HMB	Energy Rating A
HRV4.25 Q Plus -HMB Eco auralite® Indicator (onboard indicator)	TP423HMB_LT	Energy Rating A

B2 Models:

Product Model	Product Code	Energy Rating
HRV4.25 Q Plus - B2	TP433B2	Energy Rating A+
HRV4.25 Q Plus - B2 aura-t™ Control Indicator (onboard indicator)	TP433B2_T	Energy Rating A+

Filters

ISO Coarse 85% (G4) filters - XP2011629 fitted as standard
ISO ePM1 55% (F7) filters - XP2011630 spares only
ISO Coarse 85% (G4)/ISO ePM1 55% (F7) - XP2011754 spares only

Standards

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 and UKCA marked.

Specification

Dimensions: 600mm wide x 602mm high (excluding ports) x 477mm deep (487mm with mounting bracket)

Weight: 28.5kg.
Finish: White Paint (RAL9016 Semi-gloss Traffic White).

Materials

Housing: Zintec sheet steel housing, powder coated white.
Internals: Expanded polypropylene (EPP).
Heat exchanger: Made from high quality PET (Polyethylene terephthalate) materials
Internal insulation: Closed cell foamed Nitrile rubber, class ‘O’ fire rating.
Standard filters: Grade ISO Coarse 85% (G4) synthetic filters.
Guarantee period: 3 years (UK only).
Electrical: 230V ~ 50/60Hz, 3A fuse.
Installation: To be installed accordance with the relevant and applicable building regulations.
Maintenance: Service and filter replacement subject to local environment – see product manual.
Acoustics: Enquire.

Performance

Exhaust terminal configuration*	Fan speed setting	Specific fan power (W/l/s)	Heat exchange efficiency (%)	Specific fan power (W/l/s)	Heat exchange efficiency (%)	Specific fan power (W/l/s)	Heat exchange efficiency (%)
Exhaust terminal configuration*	Fan speed setting	2009		2012		10
Kitchen + 1 additional wet room	100% variable	0.46	91%	0.47	91%	0.47	91%
Kitchen + 2 additional wet rooms	100% variable	0.43	91%	0.49	90%	0.49	90%
Kitchen + 3 additional wet rooms	100% variable	0.44	90%	0.54	89%	0.54	89%
Kitchen + 4 additional wet rooms	100% variable	0.49	89%	0.65	88%	0.65	88%
Kitchen + 5 additional wet rooms	100% variable	0.55	89%	0.75	87%	0.75	87%
Kitchen + 6 additional wet rooms	100% variable	0.63	88%	0.91	86%	0.91	86%
Kitchen + 7 additional wet rooms	100% variable	0.73	87%	1.09	86%	1.09	86%

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.

Performance Curve

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

Acoustic Data

Product	% of Max flow	Airflow	dB(A) @ 3m Hemispherical			dB(A) @ 3m Spherical
Product	% of Max flow	Airflow	Induct Inlet	Induct Outlet	Casing Breakout	Casing Breakout
HRV4.25 Q Plus Eco	41%	57.8l/s @ 15Pa	41	45	27	24
	65%	104l/s @ 46Pa	44	56	36	33
	100%	157.8l/s @ 100Pa	50	64	47	44