Smart Building ROI Calculator

Building IoT system payback from energy and maintenance savings.

Building size (sq ft)

Energy cost ($/sq ft/yr)

HVAC energy share (%)

Lighting energy share (%)

Annual maintenance ($)

Implementation ($/sq ft)

HVAC savings (%)

Lighting savings (%)

Tab to move between fields

Annual savings ($)

$40,563

Implementation cost ($)$250,000

Payback period (years)6.2

5-year ROI (%)-19

Energy reduction (%)16.8

Energy savings ($/yr)$29,313

How to Use This Calculator

Enter building size in sq ft and current annual energy cost per sq ft.
Set HVAC and lighting energy shares as percentages of total energy.
Enter implementation cost per sq ft and expected HVAC and lighting savings percentages.
Input annual maintenance cost to capture O&M savings.
Review Annual savings ($), Payback period (years), and 5-year ROI (%) to evaluate the upgrade.

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