Nicheloom visits: 58,069 all-time · 7,637 in the last 7 days

The opportunity tracker for new startups.

Today: 1,953 launches · Niche of the day: specialized calculation tools · See what launched today →

A subtly obvious e-paper room air monitor

Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.

Want to reach these readers? Sponsor an issue.

In the cold season we tend to keep the windows closed. The air gets "stale": humidity often rises above 60 %, which can harm our wellbeing and promote mould. At the same time the CO₂ level in the air increases, which impacts our ability to concentrate.So I built a room air monitor that stays unobtrusive as long as everything is in the green zone, but becomes deliberately noticeable once thresholds are exceeded. For my personal love of statistics I also visualise the measurements in a clear dashboard.

HN · launched Nov 18, 2025 · 65 upvotes (top 14%) · 0 views

Niche: smart home and iot devices · 59 launches, 2 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Hardware & robotics
  • B2C
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 59 launches in smart home and iot devices →

Could you build this?

No This is a physical DIY/commercial hardware build involving microcontrollers, physical environmental sensors (CO2/humidity), and an e-paper display.

What it would actually take: Creating this air monitor requires selecting and integrating physical hardware: an MCU (e.g., ESP32 or nRF52), precision environmental sensors (NDIR CO2 sensor like Sensirion SCD40, temperature/humidity sensor), and an e-paper display module. It requires embedded C/C++ firmware development, power management for battery life or low-power USB operation, PCB design, and CAD 3D modeling for the enclosure.

Discussion

20 comments analyzed.

Competitors mentioned: Aranet4, Awair Element, Heat recovery ventilator, ESP32 with BME280/Dallas and MHZ19

Concerns raised: SCD30 self-calibration assumes unrealistic 400 ppm baseline, atmospheric CO2 now higher, Self-calibration can lock onto wrong values if triggered during non-ventilated periods, Calibration lost when power cycled, drifts over time, Hard to expose sensor to atmospheric levels weekly in sealed buildings, Accuracy slightly lower than Aranet4 based on specs

Feature requests: 3D-printable stand design, Remote phone access when away from home, Automatic window opener integration with CO2 readings, Less distracting display refresh (segmented LCD instead of e-ink)

Competitors

Other products that read as similar to this one : 114 launches clear the similarity bar, closest 8 shown.

Attention rank: #15 of 115 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Looks like the first mover among its competitors.

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.