LeeChuanjing provides calculators for planning and educational purposes only. The results are estimates based on simplified formulas and standard assumptions. They are not engineered quantities, quotes, or professional advice.
Not professional advice
- Structural, electrical, and plumbing work must be designed and verified by licensed professionals and conform to local building codes.
- HVAC sizing ignores insulation, windows, duct losses and climate细节 that a load calculation (e.g., Manual J) would capture.
- Cost estimates use approximate regional indexes and planning rates; actual prices vary by supplier, season, and site condition.
No warranty
The tools are provided "as is" without warranty of any kind. LeeChuanjing is not liable for any decision, purchase, or outcome based on these estimates. Always obtain multiple local quotes and, where required, permits and inspections.
Materials and safety
Quantities may differ from real-world needs due to waste, breakage, substrate shape, and human error. Verify critical numbers on site before ordering materials or starting work.