Water efficiency design for homes, businesses and estates — from first estimate to fully costed, CSRD-ready system.
Across Gibraltar and southern Europe, water is a rising operating cost and a growing reporting obligation. Asile designs in-house rainwater harvesting and water-reuse systems that cut mains consumption, build supply resilience, and generate verifiable water credits for sustainability reporting.
Start with the numbers. Use the calculator below to see your potential annual harvest and savings in under two minutes, then book a feasibility study to turn the estimate into an engineered design.
Most of the water you pay for never needs to be potable.
Vehicle washing, irrigation, yard and workshop cleaning, toilet flushing, cooling and industrial processes all run perfectly well on captured rainwater. For many sites this is the majority of demand — which means the majority of the bill can be substituted without touching a single drinking-water tap.
Every cubic metre of mains water you displace does three things at once: it lowers cost, it reduces exposure to future tariff rises in a desalination-dependent supply, and it produces an auditable unit of water stewardship you can report against.
Lower cost
Substitute the majority of non-potable demand and cut your mains water bill directly.
Supply resilience
Reduce exposure to future tariff rises in a desalination-dependent supply.
Verified credits
Every cubic metre avoided becomes an auditable unit of water stewardship for reporting.
What could you save each year?
Answer a few questions about your property — type, location, roof and hardstanding area, occupancy and storage space — and the tool estimates your annual mains-water savings and the system scale you'd need. It models two things together: rainwater harvesting from your roof, and optional greywater recycling that reuses shower and bath water year-round. Figures use local average rainfall and published water tariffs for your region, and you can request a full assessment directly from the results.
Indicative planning estimate. A full site audit produces engineered figures.
Two systems, stacked for maximum saving.
Rainwater harvesting captures what falls on your roof. Greywater recycling captures what you've already used. Together they cut far deeper than either alone.
A certified water reuse system collects water from showers and baths, treats it through multiple biological and physical stages to a recognised reuse standard, and returns it to toilets, washing machines and irrigation. No chemicals, no filter changes. Because it recycles indoor water, it works every day of the year, including the dry summer months when rainfall is scarce — cutting household demand by up to 45%.
The calculator above sizes the right system for your occupancy automatically.
Compact
For apartments and smaller homes.
Standard
For family homes and small businesses.
Commercial
Modular configuration for hotels, clubs and multi-building developments.
From rainfall to reuse, fully segregated.
Our systems run as an independent, non-potable network with no connection to the public water supply — eliminating any backflow risk and keeping you cleanly outside potable-water regulation while voluntarily adopting recognised standards (BS EN 16941-1, BS 8515, HSE ACOP L8).
01
Collection
Roof and hardstanding capture, first-flush diversion, pre-filtration and modular storage sized to your site.
02
Treatment
Multi-stage filtration, UV disinfection where aerosol risk requires it, pressure-controlled distribution and clearly labelled pipework.
03
Application
Point-of-use supply for cleaning, irrigation, testing and industrial processes — with metering at every stage for reporting.
Savings you can put in your sustainability report.
Every cubic metre of mains water avoided is measured, logged and verified, then converted into a water credit with a clear chain of custody. The result is audit-ready data that supports CSRD disclosure, strengthens ESG metrics with evidence rather than aspiration, and stands up to scrutiny from investors, regulators and rating agencies.
For groups operating multiple sites, surplus water and credits can be tracked and redistributed across the portfolio — turning isolated installations into a coordinated water-management network.
Designed around your property type.
Homes & villas
Reduce reliance on mains supply for irrigation, cleaning and outdoor use, with storage sized to carry winter rain into the dry season.
Businesses & industrial sites
Substitute high-volume non-potable demand — washing, cooling, process water — and report the savings against supply-chain and OEM sustainability expectations.
Estates & management companies
Coordinate collection, storage and redistribution across multiple buildings or sites, with consolidated reporting for the whole portfolio.
A clear path from estimate to operation.
Estimate
Use the calculator above for an indicative figure.
Feasibility study
We run a site audit — catchment survey, demand profiling, storage sizing and rainfall modelling — and produce a costed system specification.
Design & install
Modular, phased installation prioritising your highest-use operations first, with live monitoring from day one.
Report
A water-credit methodology aligned to CSRD, with measurement, verification and disclosure-ready records.
Start with an estimate. Finish with a system.
The calculator gives you a number in two minutes, then lets you request a full assessment without leaving the page — your details and your estimate come straight to us. A feasibility study turns that number into an engineered, costed design with verified savings.