Airthium (YC S17)

Every product you own was made with heat. We’re making that heat electric

  • Raising on Wefunder
  • SAFE
  • Hardware · United States

The raise in figures

Raised

US$479,081

Investors
396
Valuation cap
US$25M
Time left
17 days

Last updated

↳ Wefunder · checked 1 min ago

About this raise

Airthium (YC S17) is raising money on Wefunder. Based in the United States, Airthium (YC S17) sits in Wefunder’s Hardware category. Investors are offered a SAFE (simple agreement for future equity) under Regulation Crowdfunding (Reg CF).

The cap on the valuation at which it converts is $25M. 396 investors have put in $479,081 so far.

It runs from to , a run of 164 days.

For comparison, the 14 other raises in Wefunder’s Hardware category over the past 12 months drew a median of 136 investors. With 396 investors so far, Airthium (YC S17) has more investors than the median raise.

Reg CF lets a US company raise from the general public, not only accredited investors, through an SEC-registered funding portal or broker-dealer.

Live

Closes in 17 days

Day 148/164

Launched Wed 10 Jun10 Jun Day 148 of 164 Closes Sat 21 Nov21 Nov

  • Next alerts: 7 days (Sat 14 Nov), 72 hours (Wed 18 Nov) and 24 hours (Fri 20 Nov) before close

Funding history

554 readings

Airthium (YC S17): amount raised over time The amount raised rose from US$467,391 on 11 October 2026 to US$479,081 on 4 November 2026, over 554 readings.
Airthium (YC S17): amount raised per day, last 14 days 21 Oct US$1,300; 22 Oct US$2,000; 23 Oct US$0; 24 Oct US$250; 25 Oct US$0; 26 Oct US$540; 27 Oct US$0; 28 Oct US$0; 29 Oct US$0; 30 Oct US$1,000; 31 Oct -US$1,000; 1 Nov US$2,250; 2 Nov US$0; Last 24 hours US$1,000. 21 Oct: US$1,30022 Oct: US$2,00023 Oct: US$024 Oct: US$25025 Oct: US$026 Oct: US$54027 Oct: US$028 Oct: US$029 Oct: US$030 Oct: US$1,00031 Oct: -US$1,0001 Nov: US$2,2502 Nov: US$0Last 24 hours: US$1,000
Raised US$3,250 in the last 7 days; the amount changed too seldom to measure a usual daily pace.

About Airthium (YC S17)

Summarised by Raise Sonar from Airthium (YC S17)’s Wefunder pitch

Airthium builds high-temperature heat pumps that turn electricity into industrial heat, with a system that fits inside a shipping container and connects to a factory's existing gas boiler. It is designed to run hybrid, using electricity when cheap and the gas boiler when gas is cheaper. The company plans to sell heat on a Heat-as-a-Service model, with the factory paying for heat delivered. This round funds the build-out of a pilot-ready containerized unit, IP expansion and key hires, ahead of a planned paid pilot with a French chemical manufacturer.

Read the full pitch on Wefunder (opens in a new tab)

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Questions about Airthium (YC S17)’s raise

When does Airthium (YC S17)’s crowdfunding raise close?

Airthium (YC S17)’s raise on Wefunder closes on Saturday 21 November 2026 at 04:59 GMT.

What regulation is Airthium (YC S17)’s raise under?

Airthium (YC S17)’s raise is under Regulation Crowdfunding (Reg CF). Reg CF is the SEC’s exemption that lets a US company raise from the general public, not only accredited investors, through an SEC-registered funding portal or broker-dealer.

How much has Airthium (YC S17) raised so far?

As of 4 November 2026, Airthium (YC S17) has raised $479,081 from 396 investors on Wefunder.

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