Energy recovery ventilator (ERV)

Description

An ERV comprises supply and exhaust fans, a sensible or enthalpy (total) heat-exchanger core, filters and a controller. Outdoor air is pre-cooled (or pre-heated) by the exhaust air before entering the room, reducing the load on the air-conditioning system.

Starduct supplies ERVs configured for each project. Performance data (recovery efficiency, fan power, sound) is provided for the specific design with the quotation; this page does not yet publish performance data.

Applications

• Offices, schools, hotels, healthcare (areas not requiring 100 % dedicated exhaust)
• Buildings needing outdoor air per ASHRAE 62.1 / TCVN 5687 at low running cost
• Hot-humid climates: enthalpy cores also recover latent heat

Typical construction — configured per project

• Insulated coated-steel casing with access doors
• Plate heat-exchanger core (sensible or total); heat wheel for large airflows
• EC fans with speed control; outdoor-air and exhaust filters
• Integrated controller with BMS interface; optional free-cooling bypass and CO₂ sensor

Standards and testing status

• Outdoor airflow per ASHRAE 62.1 / TCVN 5687; specific fan power (SFP) checked to ASHRAE 90.1.
• No published test report / performance certification for Starduct ERVs yet: data is provided per design and identified as calculated.

General selection guide

• Outdoor airflow per the ventilation standard; balance supply and exhaust airflows.
• External static pressure (ESP) of the supply and exhaust branches from the design duct network.
• Required recovery efficiency, core type (sensible / total) and allowable electrical power (SFP).
• The tool below estimates sensible recovery and fan power from your inputs.