隔热节能计算器
使用隔热节能计算器评估改善建筑保温后的节能效果。输入当前隔热等级和升级方案，计算供暖制冷费用节省金额、投资回收期和CO₂减排量。
年储蓄额
1,421 USD
Annual Savings vs Annual Heating & Cooling Cost
公式
How to Calculate Insulation Savings
Insulation reduces heat transfer, lowering the energy needed for heating and cooling.
Formula
Efficiency Gain = 1 - (Current R-Value / New R-Value)
Annual Savings = HVAC Cost * Efficiency Gain
Recommended R-Values (US)
计算示例
Upgrade attic insulation from R-11 to R-38 with $2,000/year HVAC costs and $2,500 upgrade cost.
- 01Efficiency gain: 1 - 11/38 = 1 - 0.289 = 71.1%
- 02Annual savings: $2,000 * 0.711 = $1,421
- 03Payback: $2,500 / $1,421 = 1.8 years
- 0410-year net savings: $1,421 * 10 - $2,500 = $11,710
常见问题
What is R-value?
R-value measures thermal resistance. Higher R-values mean better insulation. R-value is additive, so you can stack insulation layers to increase the total R-value.
Where should I add insulation first?
The attic is usually the most cost-effective location since heat rises. Air sealing before insulating is critical. Next priorities are walls, floors over unconditioned spaces, and crawl spaces.
What types of insulation are available?
Common types include fiberglass batts (R-3.1/inch), blown cellulose (R-3.5/inch), spray foam (R-6.5/inch for closed cell), and rigid foam boards (R-5/inch).