An editable planner for modelling water demand, rainwater collection and storage without confusing water quantity with drinking-water safety.
Who it’s for
People exploring off-grid or resilient water systems who need to quantify demand, collection assumptions and dry-period storage.
What it helps you do
- Break daily demand down by use
- Separate potable and non-potable planning
- Estimate rainwater collection
- Model usable storage and autonomy
- Expose dry-period assumptions before choosing storage
What you get
- XLSX: Demand Planner
- Rainwater Collection Estimate
- Storage & Autonomy
- START HERE PDF
- README / personal-use licence
Format and delivery
Digital download. Keep the original files as a clean master and work from copies of editable files.
Important
Educational planning resource only. It does not replace appropriately qualified professional advice where legal, planning, financial, electrical, water-quality, structural or other specialist decisions require it. Product-specific guidance and disclaimers remain part of the download.
FAQ
Does this tell me rainwater is safe to drink?
No. Quantity does not establish potability; quality, treatment, testing and applicable rules are separate.
How is collection estimated?
Rainfall mm × collection area m² × your runoff factor.
Does annual rainfall determine tank size?
No. Timing, dry periods, demand, usable volume and backup supply matter.