Methodology and data sources
Last updated: 2026-07-14
In plain terms
We want to be transparent about where our data comes from, how often it refreshes and what its limits are. Availability is always indicative: confirm with the retailer before travelling.
What we monitor
We track availability of the Midea PortaSplit (12,000 BTU / 3.5 kW) and the PortaSplit Cool variant (8,000 BTU / 2.5 kW) across selected Spanish retailers.
We identify each product by its model and EAN barcode, not by title similarity, to avoid alerting on the wrong product.
Sources
Amazon is not used as a stock data source: its terms prohibit availability alerting. Any Amazon link is affiliate-only.
- Public product pages with structured data (schema.org) from specialist shops that permit reading: GroupSumi, Ventigo and TuClimatizaciónOnline.
- Affiliate product feeds (Awin, Tradedoubler) for large retailers, as access is approved.
Refresh interval and confirmation
We poll sources in near-real-time with a conservative per-retailer interval (typically every few minutes). Affiliate feeds refresh less often (hours to daily), so they serve as a baseline rather than for "instant restock".
Before creating a restock event we require two consecutive positive readings, except for sources marked authoritative. This keeps false alerts below 2%.
Subscriber advantage
Paid alerts use confirmed data immediately. The free public page receives the same event 20 minutes later. We do not manufacture scarcity or countdowns.
Limitations
Third-party data can change within seconds and may contain errors. A retailer outage never turns its state into "out of stock": we show the data as unavailable or stale, with its age.
Availability is indicative. Always confirm stock and price with the retailer before travelling or buying.