Passive House Savings Calculator
Passive House (Passivhaus) achieves ≤15 kWh/m²/yr heating demand versus 100–200 kWh/m²/yr for typical buildings—a 75–90% energy reduction. Extra construction cost is 5–15%, with payback typically 7–15 years. Key features: super-insulation, triple glazing, airtightness, heat recovery ventilation. ~65,000 certified buildings exist worldwide.
🌍 Why This Matters for the Planet
Why It Matters
Passive House buildings use 75–90% less energy for heating and cooling than conventional buildings. With energy prices rising, the payback period for the extra 5–15% construction cost is typically 7–15 years. Over a 30-year lifespan, Passive House delivers strong financial and environmental returns.
How You Can Help
Enter your floor area, climate zone (which sets typical energy rates), energy price, and extra build cost per m². The calculator compares standard home energy use to Passive House levels, computes annual savings, CO₂ reduction, payback period, and 30-year ROI.
Key Insights
- ●Passive House limits heating to ≤15 kWh/m²/yr vs 100–200 for typical buildings
- ●Extra construction cost is typically 5–15%
- ●Payback is usually 7–15 years depending on energy prices
- ●~65,000 certified Passive House buildings exist worldwide
📋 Quick Examples — Click to Load
For educational and informational purposes only. Verify with a qualified professional.
🌎 Planet Impact Facts
Passive House limits heating to ≤15 kWh/m²/yr
— Passivhaus Institut
75–90% energy reduction vs conventional buildings
— PHIUS
Heat recovery ventilation recovers 75–95% of exhaust heat
— PHI
Triple-glazed windows minimize thermal bridges
— Passivhaus
~65,000 certified Passive House buildings worldwide
— iPHA
Typical payback 7–15 years
— PHIUS
Passive House (Passivhaus) achieves ≤15 kWh/m²/yr heating demand versus 100–200 kWh/m²/yr for typical buildings—a 75–90% energy reduction. Extra construction cost is 5–15%, with payback typically 7–15 years. Key features: super-insulation, triple glazing, airtightness, heat recovery ventilation. ~65,000 certified buildings exist worldwide.
Sources: Passivhaus Institut, PHIUS, International Passive House Association
Key Takeaways
- • Passive House limits heating demand to ≤15 kWh/m²/yr vs 100–200 for typical buildings
- • Super-insulation, triple glazing, airtightness, and HRV are core requirements
- • Extra cost 5–15%; payback typically 7–15 years depending on energy prices
- • ~65,000 certified Passive House buildings exist worldwide
Did You Know?
How Passive House Works
Super-Insulation
Thick insulation (often 300–500 mm) in walls, roof, and floor minimizes heat loss. U-values typically 0.10–0.15 W/(m²K) versus 0.2–0.4 for conventional construction.
Airtightness
Airtight envelope (<0.6 ACH@50) prevents drafts and uncontrolled moisture. Achieved via continuous air barrier, sealed penetrations, and careful detailing.
Heat Recovery Ventilation
HRV recovers 75–95% of heat from exhaust air to preheat incoming fresh air. Ensures healthy indoor air quality without opening windows in cold weather.
Expert Tips for Passive House
Design Early
Passive House works best when integrated from the start. Retrofits are possible but cost more. Use PHPP (Passive House Planning Package) for design verification.
Minimize Thermal Bridges
Thermal bridges can negate insulation benefits. Continuous insulation and careful detailing at junctions are critical.
Right-Size Windows
South-facing glazing captures solar gain; north-facing should be minimal. Triple glazing with low-e coatings is standard.
Certified Products
Use Passive House certified components (windows, HRV, insulation) to ensure performance. PHI and PHIUS maintain product databases.
Typical Energy Use by Climate (kWh/m²/yr)
| Climate | Standard Home | Passive House | Reduction |
|---|---|---|---|
| Cold | 150 | 15 | 90% |
| Temperate | 120 | 15 | 88% |
| Warm | 100 | 15 | 85% |
| Hot | 80 | 15 | 81% |
Frequently Asked Questions
What is the Passive House (Passivhaus) standard?
Passive House is a voluntary building standard requiring ≤15 kWh/m²/yr heating demand, versus 100–200 kWh/m²/yr for typical buildings. It achieves 75–90% energy reduction through super-insulation, triple glazing, airtightness, and heat recovery ventilation. ~65,000 certified buildings exist worldwide.
How much extra does Passive House construction cost?
Extra construction cost is typically 5–15% over conventional building. Premiums vary by region, labor costs, and material availability. In many markets, the incremental cost has narrowed as supply chains mature. Payback is usually 7–15 years depending on energy prices.
What is the payback period for Passive House?
Payback is typically 7–15 years. It equals extra build cost divided by annual energy cost savings. Higher energy prices and colder climates shorten payback. Over a 30-year lifespan, Passive House usually delivers strong positive ROI.
Does Passive House work in warm climates?
Yes. The standard adapts to climate: heating demand ≤15 kWh/m²/yr in cold/temperate zones; cooling and dehumidification limits apply in hot/humid regions. Passive cooling via shading, night ventilation, and thermal mass reduces mechanical cooling needs.
What are the key Passive House features?
Super-insulation (thick walls/roof), triple-glazed windows, airtight envelope (<0.6 ACH@50), heat recovery ventilation (HRV), and thermal bridge-free design. Solar gain and internal gains (appliances, occupants) often supply most heating in temperate climates.
How many Passive House buildings exist?
~65,000 certified Passive House buildings worldwide. The standard originated in Germany in the 1990s and has spread across Europe, North America, and Asia. PHIUS and PHI offer certification; many more buildings use Passive House principles without formal certification.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator provides estimates based on Passive House standards and typical energy rates. Actual savings depend on climate, occupancy, building quality, and energy prices. Consult a Passive House consultant or certified designer for project-specific analysis.
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