Sourcing: philips.com.sg confirms this model is currently sold ("Add to basket" present, no "no longer available" notice, checked via raw HTML fetch 2026-08-06), but the page renders its price client-side — no price figure is present in the page's static HTML/source. Purchase price is therefore sourced from an authorised SG retailer (Best Denki) instead, per this project's rule for brand sites lacking a displayed figure. Cross-checked against Gain City, Challenger, and Courts, which also show SGD 78.00 as the regular/standard price (with active promotional prices of SGD 55–59 at several of them, not recorded here per the standard-price rule). Filter (AWP315/97): official capacity is published as 1,200 L with a "timer-based reminder system," but no month-equivalent replacement interval is published on philips.com.sg or the retailer pages checked — recorded replace_interval_months: null rather than estimating one from the capacity figure. Filter price (SGD 49.90) sourced from Challenger (regular price; SGD 45.00 promotional price also shown there, not recorded). installation_fee_sgd recorded as 0: this is a self-installed tap-mounted filter with "Quick Fit" adapters (no professional installation offered or required). installation: physical dimensions not published on the philips.com.sg product page for this specific SKU (AWP3754/97) — recorded null rather than reusing the dimensions of a visually similar sibling product (WP3811 series, 60×137×105mm), since these are different filter designs (X-Guard vs Micro Pure) and Philips does not state they share a housing. Outputs: on-tap filter — filters mains/ambient tap water only; no hot/cold function. Certifications: page displays an unrelated "VAT relief eligible" note (a UK/EU tax artifact with no bearing on Singapore, likely template leakage) — not a certification and not recorded as one.