# HVAC Filter Delivery: AI Shortlist Index, October 2026

> The October 2026 record of HVAC Filter Delivery in the AI Shortlist Index: every vendor as measured, with the editorial read. This page does not change.

Canonical: https://webpossible.com/ai-shortlist-index/hvac-filter-delivery/2026-10/
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Format: Markdown version for AI agents. The canonical HTML page is at the source URL above.
Last verified: 2026-09-03

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AI Shortlist Index · October 2026 snapshot · Prompt Set v1.0

# HVAC Filter Delivery: AI Shortlist Index, October 2026

The hvac filter delivery ranking as the October 2026 edition measured it: 50 runs across 25 prompts. The [live category page](/ai-shortlist-index/hvac-filter-delivery/) carries the current edition; this one does not change.

## Editorial read

Fifty runs, one per prompt on each engine: ChatGPT from its app on 27 October 2026, Claude through the Anthropic API on 31 October. FilterTime was named in 95% of runs on both engines, Second Nature in 82% and Filterbuy in 54%. filtertime.com was the most-cited domain, with 42 citations. One run per prompt per engine; read it as a first reading.

## Ranking

HVAC Filter Delivery, October 2026 snapshot. 50 runs from 2 engines. Mention rate = share of runs that named the vendor. Green means named.
| # | Vendor | Mention rate | Engines | Consistency | Move | Trend |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | [FilterTime](/ai-shortlist-index/hvac-filter-delivery/filtertime/) | 95% | 2/2 | – | ▲ 1 | – |
| 2 | [Second Nature](/ai-shortlist-index/hvac-filter-delivery/second-nature/) | 82% | 2/2 | – | ▼ 1 | – |
| 3 | [Filterbuy](/ai-shortlist-index/hvac-filter-delivery/filterbuy/) | 54% | 2/2 | – | – | – |
| 4 | [Homestock USA](/ai-shortlist-index/hvac-filter-delivery/homestock-usa/) | 38% | 2/2 | – | – | – |
| 5 | [Beagle](/ai-shortlist-index/hvac-filter-delivery/beagle/) | 35% | 2/2 | – | – | – |
| 6 | [Filters Direct USA](/ai-shortlist-index/hvac-filter-delivery/filters-direct-usa/) | 20% | 2/2 | – | ▼ 1 | – |
| 7 | [Latchel](/ai-shortlist-index/hvac-filter-delivery/latchel/) | 10% | 1/2 | – | ▼ 3 | – |
| 8 | [Filter-Smart](/ai-shortlist-index/hvac-filter-delivery/filter-smart/) | 8% | 1/2 | – | – | – |
| 9 | [Caliper Air](/ai-shortlist-index/hvac-filter-delivery/caliper-air/) | 8% | 1/2 | – | – | – |
| 10 | [Piñata](/ai-shortlist-index/hvac-filter-delivery/pinata/) | 4% | 1/2 | – | – | – |
| 11 | [Paylode](/ai-shortlist-index/hvac-filter-delivery/paylode/) | 2% | 1/2 | – | – | – |

## Engines

Engines in this edition. Mention rates are averaged over the engines shown.
| Engine | Status | Model | Runs | Note |
| --- | --- | --- | --- | --- |
| ChatGPT | ran | gpt-6-thinking | 25 |  |
| Claude | ran | claude-haiku-5-5 | 25 |  |

Part of [the October 2026 edition](/ai-shortlist-index/2026-10/) of [the AI Shortlist Index](/ai-shortlist-index/). All editions: [archive](/ai-shortlist-index/archive/).

Last verified 2026-09-03