Domain Arrivals
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Featured in Domain Arrivals · 2026-08-19

DuctDuck, the Offline HVAC Design Chain

ductduck.com ↗ · Useful Tools · score 84.0
○Open: public page gives enough substance to understand the site $Paid: pricing, booking, ecommerce, subscription, or paid access is visible ADAds: visible ad load or ad-supported content ✦Pretty: notable design, copy, craft, or presentation ◆Pro: polished, finished-feeling, serious, or operationally mature ◇Niche: specific audience, workflow, or unusually focused use case ◉Human: personal, local, community, civic, handmade, or real-person signal !Suspicious: scammy, spammy, trust theater, finance fog, or credibility concern

A phone-friendly calculator for residential HVAC loads, tonnage, CFM, duct sizing, friction rates, and registers.

Why it surfaced

DuctDuck connects the Manual J-through-T workflow in one continuous chain, including room-level loads, multi-unit systems, trunk reductions, and register sizing. It is unusually candid about its limits: the tool says it is not ACCA-approved software, but is designed for field estimates, ordering, and sanity-checking without a signal.

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The Song Resumes After the Story

August 19’s newborn domains include a Hawaiʻi road-trip radio that resumes each song after a GPS-triggered story, an offline Chattanooga recovery map, a 100 KiB operating system running Doom, and an archive of 169,588 Discord roleplay messages.

This is one of 1,000 discoveries in the 2026-08-19 Domain Arrivals issue.

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An interactive income visualization that places your earnings among people worldwide, then replays their relative weight across 147 countries.

 Atlas Radio — The Road Becomes the Dial echosatlas.com

An offline iPhone station for Hawaiʻi road trips that blends original music with GPS-triggered stories about places along the route.

 Wildfire Live Map, Watching the Planet Burn wildfirelivemap.com

A worldwide wildfire map that combines satellite heat detections, burned-area outlines, historical playback, and regional hotspot counts.