≈ 93 m² of horizontal roof plan area draining to collection
Downpipe configuration helps select the right pre-filter model.
Is there a pipe carrying water from roof to ground?
How many downpipes?
Potable use requires Post-Filtration & UV/Carbon treatment for compliance.
What Are You Trying to Achieve?
Pick the option that best matches your requirement:
Do you want this system to meet 100% of your water needs?
Do you already have a rainwater storage tank?
Do you want filtration/treatment after the tank?
Demand vs. Supply Match
20%
of yearly demand is matched by rooftop supply.
Shortfall: 2.5 lakh L/yr to be met from other sources.
Limited offset
Annual harvest potential
61,540L / yr
Annual demand
3,12,075L / yr
Rainiest month
13days rain
Monthly Supply vs. Demand
Recommended Tank & Storage Sizing
Pre-filtration cost
₹ 10,266/-
Recommended Post-Filtration Technology
Sized from your daily demand (÷ ~4hr operating window), not roof area.
Preliminary technology estimate: ₹ 65,266/- – ₹ 85,266/-
Proven Installations by Ridge Water Harvesting
Snowking Retreat • 12,000L/4hr Yield
Chalets Resort • 80% Tanker Cut System
150+ Projects Executed
UNESCO Recognized
2-Hour Callback Promise
Summary Report
Ridge Water Harvesting Assessment
Rainwater Technology & Engineering Advisor
150+ Completed Projects • UNESCO Award Recognized • Contact: +91 98820 88049 • fao.ridge@gmail.com
Site & Demand Details
| Building Type | Residence |
| Location | Delhi, Delhi |
| Catchment Area | 1,000 sq ft |
| Occupants Count | 6 |
| Daily Demand | 900 L |
| Annual Demand | 3.12 lakh L |
Harvest Potential & Supply
| Annual Rainfall Basis | 780 mm |
| Annual Harvest Potential | 61,540 L |
| Demand-Supply Match | 20% |
| Recommended Storage Tank | 25,000 L |
| Pre-filtration Estimate | ₹ 10,266/- |
| Estimated Payback | 2.4 Years |
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