NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN
AUSTRALIA, CANADA, THE HONG KONG SPECIAL ADMINISTRATIVE REGION OF THE PEOPLE'S
REPUBLIC OF CHINA, SOUTH AFRICA, NEW ZEALAND, JAPAN OR THE UNITED STATES, OR ANY
OTHER JURISDICTION IN WHICH SUCH RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE
UNLAWFUL.

Reference is made to the stock exchange announcement published by Airthings ASA
(the "Company") on 15 December 2025 regarding the commencement of the
subscription period (the "Subscription Period") in the subsequent offering (the
"Subsequent Offering") consisting of 250,000,000 new shares in the Company (the
"Offer Shares") at a subscription price of NOK 0.10 per Offer Share. 

The Subscription Period expired today, 22 December 2025, at 16:30 hours (CET).
The Company has been informed by the Manager (as defined below) that at the end
of the Subscription Period, and based on a preliminary count, valid
subscriptions had been received for a total of 38,070,847 Offer Shares. Any
remaining Offer Shares will be allocated to the underwriters of the Subsequent
Offering. 

The final result of the Subsequent Offering is expected to be announced by the
Company on or about 23 December 2025. Investors that are allocated Offer Shares
can access information on the number of Offer Shares allocated through VPS on or
about 23 December 2025. Further announcements in respect of the Subsequent
Offering and the Offer Shares will be made in due course.

The due date for payment of the Offer Shares is on 5 January 2026. Subject to
due payment of the Offer Shares by the subscribers, the share capital increase
relating to the Subsequent Offering is expected to be registered with the
Norwegian Register of Business Enterprises (the "NRBE") on or about 12 January
2026 and the Offer Shares will thereafter be delivered to the VPS accounts of
the allocated subscribers on or about 13 January 2026. First day of trading of
the Offer Shares on Euronext Oslo Børs is expected on or about 13 January 2026,
after the share capital increase relating to the Subsequent Offering is
registered with the NRBE. A separate announcement will be made when the share
capital increase has been registered. 

DNB Carnegie, a part of DNB Bank ASA (the "Manager") is acting as manager in
connection with the Subsequent Offering. Advokatfirmaet Schjødt AS is acting as
legal advisor to the Company.

This information is subject to a duty of disclosure pursuant to Section 5-12 of
the Norwegian Securities Trading Act. 

About Airthings 

Airthings is a leading global technology company specializing in award-winning
radon detectors and indoor air quality (IAQ) monitors for homes, workplaces, and
schools. With a mission to empower people worldwide to understand and improve
the air they breathe, Airthings offers accessible, accurate, and user-friendly
solutions designed to enhance health and well-being through simple and
affordable technology. Airthings has sold over 1 million devices worldwide. The
company and its products have received the TIME Best Inventions Award and CES
Innovation Award Honor. Headquartered in Oslo, Norway, with additional offices
in the United States, Airthings continues to innovate and educate on the
importance of continuous indoor air quality monitoring. For more information on
Airthings' comprehensive range of IAQ solutions and the benefits of healthy
indoor air, please visit airthings.com.

Important notices: 

This announcement is not and does not form a part of any offer to sell, or a
solicitation of an offer to purchase, any securities of the Company. The
distribution of this announcement and other information may be restricted by law
in certain jurisdictions. Copies of this announcement are not being made and may
not be distributed or sent into any jurisdiction in which such distribution
would be unlawful or would require registration or other measures. Persons into
whose possession this announcement or such other information should come are
required to inform themselves about and to observe any such restrictions. 

The securities referred to in this announcement have not been and will not be
registered under the U.S. Securities Act of 1933, as amended (the "Securities
Act"), and accordingly may not be offered or sold in the United States absent
registration or an applicable exemption from the registration requirements of
the Securities Act and in accordance with applicable U.S. state securities laws.
The Company does not intend to register any part of the offering or their
securities in the United States or to conduct a public offering of securities in
the United States. Any sale in the United States of the securities mentioned in
this announcement will be made solely to "qualified institutional buyers" as
defined in Rule 144A under the Securities Act. 

In any EEA Member State, this communication is only addressed to and is only
directed at qualified investors in that Member State within the meaning of the
Prospectus Regulation, i.e., only to investors who can receive the offer without
an approved prospectus in such EEA Member State. The expression "Prospectus
Regulation" means Regulation 2017/1129 as amended together with any applicable
implementing measures in any Member State. 

This communication is only being distributed to and is only directed at persons
in the United Kingdom that are (i) investment professionals falling within
Article 19(5) of the Financial Services and Markets Act 2000 (Financial
Promotion) Order 2005, as amended (the "Order") or (ii) high net worth entities,
and other persons to whom this announcement may lawfully be communicated,
falling within Article 49(2)(a) to (d) of the Order (all such persons together
being referred to as "relevant persons"). This communication must not be acted
on or relied on by persons who are not relevant persons. Any investment or
investment activity to which this communication relates is available only for
relevant persons and will be engaged in only with relevant persons. Persons
distributing this communication must satisfy themselves that it is lawful to do
so.

Matters discussed in this announcement may constitute forward-looking
statements. Forward-looking statements are statements that are not historical
facts and may be identified by words such as "believe", "expect", "anticipate",
"strategy", "intends", "estimate", "will", "may", "continue", "should" and
similar expressions. The forward-looking statements in this release are based
upon various assumptions, many of which are based, in turn, upon further
assumptions. Although the Company believes that these assumptions were
reasonable when made, these assumptions are inherently subject to significant
known and unknown risks, uncertainties, contingencies and other important
factors which are difficult or impossible to predict and are beyond its control.

Actual events may differ significantly from any anticipated development due to a
number of factors, including without limitation, changes in investment levels
and need for the Company's services, changes in the general economic, political
and market conditions in the markets in which the Company operate, the Company's
ability to attract, retain and motivate qualified personnel, changes in the
Company's ability to engage in commercially acceptable acquisitions and
strategic investments, and changes in laws and regulation and the potential
impact of legal proceedings and actions. Such risks, uncertainties,
contingencies and other important factors could cause actual events to differ
materially from the expectations expressed or implied in this release by such
forward-looking statements. The Company does not provide any guarantees that the
assumptions underlying the forward-looking statements in this announcement are
free from errors nor does it accept any responsibility for the future accuracy
of the opinions expressed in this announcement or any obligation to update or
revise the statements in this announcement to reflect subsequent events. You
should not place undue reliance on the forward-looking statements in this
announcement. The information, opinions and forward-looking statements contained
in this announcement speak only as at its date, and are subject to change
without notice. The Company does not undertake any obligation to review, update,
confirm, or to release publicly any revisions to any forward-looking statements
to reflect events that occur or circumstances that arise in relation to the
content of this announcement. 

Neither the Manager nor any of its affiliates makes any representation as to the
accuracy or completeness of this announcement and none of them accepts any
responsibility for the contents of this announcement or any matters referred to
herein. This announcement is for information purposes only and is not to be
relied upon in substitution for the exercise of independent judgment. It is not
intended as investment advice and under no circumstances is it to be used or
considered as an offer to sell, or a solicitation of an offer to buy any
securities or a recommendation to buy or sell any securities in the Company. 

Neither the Manager nor any of its respective affiliates accepts any liability
arising from the use of this announcement.