🚗 ASHRAE 62.1 / IMC 404 (0.75 CFM/sqft vs CO/NO2 Sensor-Demand 0.05 CFM/sqft)

Enclosed Parking Garage Ventilation Calculator

Size continuous and variable-speed demand-controlled ventilation (DCV) systems for enclosed commercial parking structures under ASHRAE 62.1 & IMC Section 404: calculate code baseline continuous exhaust (0.75 CFM per sq ft), evaluate 85% energy savings using modulating VFD fans linked to carbon monoxide (CO <25 ppm) and nitrogen dioxide (NO2 <0.1 ppm) sensor arrays, and energy yields.

1. Project & Operating Inputs

Parking Garage Floor Area (Square Feet e.g. 120,000 Sq Ft Parking Deck)

Baseline Exhaust Rate (CFM / Sq Ft e.g. 0.75 CFM / Sq Ft Code Baseline)

Turnkey CO/NO2 Sensor Array & VFD Fan Controls CapEx ($ e.g. $68,500)

Blended Electricity Tariff ($ / kWh e.g. $0.16 / kWh Electric Rate)

2. Financial Breakdown & Yield

ASHRAE 62.1 GARAGE VENTILATION

5-Year Fan Energy Dollar Savings

CO/NO2 Sensor DCV Retrofit ROI

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost