Inputs come first
Our calculators use the values entered by the visitor. Sample values demonstrate the tool but do not claim to describe every home or product. Use equipment nameplates, EnergyGuide labels, manufacturer documentation, utility rates, measured runtime, or qualified evaluations whenever available.
Core formulas
Review
Gary provides field-minded review and practical judgment. Quinnlan Rae provides AI-assisted design, implementation, research organization, and written drafts. Manufacturer documents and authoritative public sources are preferred for technical reference points.
Limits
Calculators cannot observe your installation, wiring, fuel system, climate, maintenance condition, control strategy, occupancy, or local requirements. Results are estimates and do not replace engineering, code review, professional installation, or manufacturer instructions.
Corrections
We want specific corrections. Include the page, the questionable statement or result, the equipment model when relevant, and a source or photo that helps verify the issue.