Braen Ave

Challenge

A 2,000-square-foot office suite with central heating and air-conditioning had serious Indoor Air Quality (IAQ) issues due to a manufacturing and welding facility situated directly beneath it. High levels of carbon monoxide (above 100 ppm) and combustion products infiltrated the office, which was evacuated.

Solutions

Haglid Engineering designed a ventilation system that utilizes energy recovery modules.

The system, a direct vent BPE-XE-200 unit and two 19-watt fans (total power consumption 38 watts), now provides fresh air with non-detectable CO levels. Haglid Engineering’s solution saved the facility from having to purchase a new HVAC system ($45,000). Additionally, air-conditioning and heating costs were reduced by one-third.

The total cost for equipment and installation came to under $5,000. The system also provided over 85% energy recovery with a payback of less than four years or an IRRA of over 25%

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