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Free calculator to estimate energy-demand reduction and operating-cost savings from Passive House-style retrofit scenarios. Explore more in our energy and sustainability calculator category.
Last updated: April 9, 2026
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Annual Energy Savings
24200 kWh
Annual Cost Savings
$5268
Net Retrofit Cost
$40000
Simple Payback
7.6 years
10-Year Net Savings
$12680
High savings potential with substantial annual demand reduction and operating-cost benefit.
Typically provides stable energy-demand reduction across seasons.
Often improves both comfort and long-term operating economics.
Can produce significant annual savings in heating-dominant regions.
Higher electricity prices can improve financial outcomes for deep efficiency.
Policy support can materially shorten payback periods.
Lower baseline demand can improve overall system economics.
For 2,200 sq ft with EUI shift from 18 to 7 kWh/sq ft/year:
Annual Energy Savings
~24,000 kWh
Annual Cost Savings
Meaningful
The model compares current and Passive House target energy-use intensity, converts the difference into annual kWh savings, and then estimates annual cost benefit using energy price and maintenance assumptions. It also computes payback based on net retrofit cost.
Directional planning tool only. Detailed retrofit design and certification should use project-specific simulation and verification methods.
EUI Baseline → Passive Target → kWh Savings → Cost Savings → Payback
Share it with retrofit teams, architects, and energy planners
Suggested hashtags: #PassiveHouse #BuildingEfficiency #Retrofit #Sustainability #Calculator