From grimoire
Systematically evaluates a home's energy performance and produces a prioritized upgrade roadmap with payback estimates.
How this skill is triggered — by the user, by Claude, or both
Slash command
/grimoire:audit-home-energy-efficiencyThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Systematically evaluate a home's energy performance and produce a prioritized upgrade roadmap with payback estimates.
Systematically evaluate a home's energy performance and produce a prioritized upgrade roadmap with payback estimates.
Adopted by: DOE, ENERGY STAR program partners, RESNET-certified raters, utility companies in 50 states Impact: Homes audited and upgraded per DOE methodology reduce energy bills by 15–30%; proper air sealing alone saves average $300/year; HERS-rated homes sell for 2.7% premium Why best: Systematic assessment catches the highest-ROI improvements (air sealing, insulation) that owners miss when focusing on visible upgrades like new windows
Sources: DOE Home Energy Score Methodology (2023); ENERGY STAR Home Energy Audit Standards (2023); RESNET HERS Index (2023)
Gather 12 months of utility data — Collect electricity and gas bills; calculate energy use intensity (EUI = total BTU / conditioned sq ft). Establish baseline before any changes.
Conduct a visual envelope inspection — Inspect attic insulation depth (R-value), wall insulation type, basement/crawlspace conditions, window age and glazing type, and door weatherstripping.
Perform blower door test (or estimate air leakage) — A certified rater uses a blower door to measure ACH50 (air changes per hour at 50 pascals). Target: <7 ACH50 for existing homes, <3 for new construction. Without equipment, check for drafts at outlets, switches, and penetrations.
Inspect HVAC system — Note equipment age, SEER/AFUE ratings, filter condition, duct location (conditioned vs. unconditioned space), and duct sealing quality. Check thermostat type.
Assess water heating — Record water heater age, fuel type, and EF/UEF rating. Check pipe insulation on first 6 feet of hot and cold lines.
Evaluate lighting and appliances — Inventory incandescent vs. LED fixtures; note major appliance energy ratings (refrigerator, washer/dryer, dishwasher).
Calculate HERS index score — Use RESNET methodology or a certified rater: 100 = 2006 IECC reference home; 0 = net-zero. Scores below 70 indicate significant upgrade opportunity.
Prioritize by payback period — Rank improvements: air sealing (1–3 yr payback), attic insulation (3–7 yr), HVAC replacement (7–12 yr), windows (15–25 yr). Lead with highest ROI.
Identify available incentives — Check federal tax credits (IRA 2022: up to $3,200/yr for efficiency upgrades), state rebates, and utility programs. Incentives can cut payback periods by 30–50%.
Produce written audit report — Document findings, recommended measures, estimated costs, annual savings, simple payback, and incentive eligibility for each measure.
npx claudepluginhub jeffreytse/grimoire --plugin grimoireAssesses building or facility energy consumption to identify waste, prioritize efficiency improvements, and establish reduction baselines.
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