How to Verify Delivered Quality on a Fresh Air System
The honest answer is that no supplier catalogue establishes it. Quality on China fresh air units for homes is decided at handover, by comparing what the nameplate promises with what the delivered unit actually does — and an energy recovery ventilator is judged by the same readings as a heat recovery ventilation system. The practical route is an acceptance test, run unit by unit.
Nameplate, Airflow and Sound at the Design Point
Measure airflow at the design external static pressure, not at free air; a free-air curve says nothing about a ducted installation, and the curve should cover the design duty with margin. Sound is the second check: confirm the sound pressure level at the specified condition and distance, because a ceiling mounted heat recovery unit above a bedroom is judged at the occupied position, not one metre from the casing. Third, heat recovery ventilation efficiency belongs at the design airflow — a figure taken at reduced flow flatters the unit. On a home heat recovery ventilation system, these three readings decide acceptance, and the same test applies to an 
.
Airtightness, Filtration and Condensate
Check filter bypass first on every fresh air heat recovery unit: media that sits loosely in its frame passes dust around the edge, and a pressure-drop reading will not reveal it. Then test casing airtightness at positive and negative pressure, since balanced ventilation with heat recovery depends on seals on both sides of the core. In an HRV fresh air system, balance the supply and exhaust paths before taking readings. Condensate drainage and insulation continuity matter too: confirm traps, slopes and uninterrupted insulation to prevent surface condensation — a detail that house ventilation heat recovery installs often miss. For a wall mounted heat recovery ventilator, the wall penetration and its sealing are part of the delivered assembly, not a site detail.
Controls, Alarms and Traceable Documents
Commission the controller before sign-off: verify airflow stages, frost-protection setpoints, and that alarms report real faults rather than silent bypasses. Documents close the loop. For a fresh air heat recovery ventilation system, ask for a test record carrying the unit serial number, a packing list checked against the order, a spare-parts list and an O&M manual in the project language. On a whole house ventilation with heat recovery project, that file lets a contractor defend the installation two years later and lets a distributor support a residential heat recovery ventilator without returning to the factory, while giving a project buyer a written basis for acceptance.
IGUICOO has manufactured heat recovery and fresh air system products since 2013, holds more than 80 patents plus ISO 9001, ISO 14001, ISO 45001 and CE certification, and supplies its ceiling-mounted ERV series with per-unit test records. Quality is not a claim a manufacturer makes; it is a set of readings taken on the fresh air units you received. Ask for those readings before final payment.
Contact IGUICOO for a customized ERV solution tailored to your project requirements.
Post time: Oct-19-2026
