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Nitrogen Generators for Hot water boilers

As the leading provider of nitrogen solutions for central heating plants, FLAIRMO offers specialised N2 generation systems designed for the unique demands of high-capacity electric / hot water boilers – protecting your assets from corrosion and ensuring the highest safety standards for the most prominent boiler brands in the Nordics.

Recommended Products

N2 Generators Built for Hot Water Boilers

Hot water boilers or electrode boilers (the boiler goes by many names) require a precise nitrogen supply for H2 sweeping and operational safety. The models below are our most frequent installations for boiler systems across the Nordics, though our complete nitrogen generator range covers any plant capacity or layout. Designed and manufactured in Denmark, these systems feature CMS adsorption towers built for 10+ years and maintenance intervals that ensure your heat production remains uninterrupted.

N2G-40C
Compact plug-and-play unit with integrated air supply. A popular N2-unit used for many Nordic boilers.
Flow40 Nl/min
PurityUp to 99.9995%
Air supplyInternal compressor
View specifications →
N2G-40CS
Compact plug-and-play N2 unit in a sound-insulated cabinet. A premium choice for boiler plants.
Flow40 Nl/min
PurityUp to 99.9995%
Air supplyInternal compressor
View specifications →
N2G-80
High-capacity N2 unit for large-scale boilers or integrated dual-supply systems.
Flow80 Nl/min
PurityUp to 99.9995%
Air supplyExternal compressor
View specifications →
N2G-160
Top-tier high-capacity N2 solution for large plants requiring robust, central supply.
Flow160 Nl/min
PurityUp to 99.9995%
Air supplyExternal compressor
View specifications →

If your boiler setup demands a different nitrogen output to ensure peak operational uptime, view our comprehensive selection of scalable N2 solutions for all boiler sizes below.

Nitrogen Generators for Electric & Hot Water Boilers – FLAIRMO
The Case for Nitrogen

Why Nitrogen Is Critical for Modern Electric Boilers

In the world of central heating and industrial steam, nitrogen is more than just a gas - it is a safety and maintenance essential. The transition to high-voltage electrode boilers and large-scale hot water systems demands a precise inert atmosphere to function safely and efficiently.

Hydrogen (H₂) Sweeping

During the electrolysis process, small amounts of hydrogen can form. Our nitrogen generators provide a continuous "sweep" flow that safely dilutes and removes H₂, eliminating the risk of explosion.

Superior Corrosion Protection

By maintaining a nitrogen blanket, you displace oxygen - the primary driver of internal corrosion. This significantly extends the lifespan of the boiler and the entire pipe network.

Precision Pressure Maintenance

Our systems ensure the boiler remains under a stable, inert pressure, preventing cavitation and air ingress during load changes - around the clock, regardless of operating conditions.

Headache-Free Operation

Whether you are a consulting engineer designing a new plant or a plant manager responsible for daily operations, FLAIRMO provides the expertise and equipment to ensure a reliable, worry-free nitrogen supply.

Nitrogen Generators for Electric & Hot Water Boilers – FLAIRMO
Centralised Supply

One Solution for Boilers and Accumulator Tanks

A major advantage of the FLAIRMO approach is our ability to create centralised N2 systems. Many plants operate both large electric boilers and massive accumulator tanks. Since both require a standard purity of 99.5%, it is highly efficient to utilise a shared nitrogen source.

We specialise in "Split-Flow" designs where a single high-capacity nitrogen generator feeds a central buffer tank - from which the supply is branched to serve your entire facility.

  • Reduced CAPEX - one generator replaces two separate installations, cutting total investment costs.
  • Simplified maintenance - a single system to service instead of two independent units at different locations.
  • Uniform gas quality - the same high-quality nitrogen supply protects your entire plant from a single verified source.
  • Future-proof - capacity can be scaled as your facility grows or additional applications are identified.
Nitrogen Generators for Electric & Hot Water Boilers – FLAIRMO
Purity & Flexibility

Scalable Purity from 99.5% to 99.9995%

While 99.5% purity is the industry standard for most electric boilers and thermal storage, some specialised processes require even higher levels of inertness.

FLAIRMO's PSA nitrogen generators are built for flexibility. We provide the 99.5% purity required by the largest Nordic boiler manufacturers as a standard, but our systems can be configured to deliver up to 99.9995% purity if your specific project demands it.

We match the gas to the application - never the other way around.

Nitrogen Purity Reference
Electric Boilers / Accumulator Tanks 99.5%
Maximum purity (FLAIRMO N2 generators) 99.9995%
All FLAIRMO generators use PSA technology with Carbon Molecular Sieve (CMS) - the same adsorption towers are rated for 10+ years of operation.
Nitrogen Generators for Electric & Hot Water Boilers – FLAIRMO
Who It's For

Designed Around the People Who Build and Run These Plants

Consulting Engineers

The Consultant's Choice: Seamless Integration

We understand that layout and integration are critical. FLAIRMO supports consultants with detailed specifications, CAD files, and advice on dimensioning. Whether you are dealing with high-pressure requirements or tight space constraints, our compact units are designed to fit into modern plant layouts with ease.

  • Detailed technical specifications & CAD files
  • High-pressure operation with boosters
  • Compact footprint for modern plant layouts
  • Expert dimensioning support from our engineers
  • Purity-to-application matching, not the other way around
Plant Managers

The Plant Manager's Choice: Total Reliability

For the plant manager, a FLAIRMO generator means the end of handling heavy gas cylinders and unpredictable delivery costs. Our generators produce nitrogen on-demand from simple compressed air, providing an independent, low-maintenance solution that lowers the overall cost of ownership.

  • No gas cylinders, no deliveries, no logistics
  • On-demand N₂ from simple compressed air
  • Low total cost of ownership
  • Minimal maintenance - annual service only
  • CMS adsorption towers rated for 10+ years
Nitrogen Generators for Electric & Hot Water Boilers – FLAIRMO
Track Record

Partner with the Leaders in Central Heating Nitrogen

Having supplied nitrogen solutions to several of the most significant energy projects in the Nordics, we have the experience to guide you through design, commissioning, and service. We don't just sell machines - we provide the technical expertise that ensures your plant runs safely from day one.

150+
Installations in Denmark
Nitrogen systems delivered to district heating plants across the country - from small community plants to large urban networks.
99.5%
Standard purity for boilers
The purity level required by the largest Nordic boiler manufacturers - delivered as standard with every FLAIRMO installation.
12bar
Max operating pressure
Our systems can handle the high-pressure requirements of modern electrode boiler installations and large-scale thermal storage systems.

Find the Right Nitrogen Solution for Your Boiler

Every boiler installation is different. Share your system requirements with us, and we will do the dimensioning work for you – recommending the right nitrogen generator based on hands-on experience from central heating plants across the Nordics.

Privacy Policy

Last updated: October 18, 2021

This Privacy Policy describes Our policies and procedures on the collection, use and disclosure of Your information when You use the Service and tells You about Your privacy rights and how the law protects You. We use Your Personal data to provide and improve the Service. By using the Service, You agree to the collection and use of information in accordance with this Privacy Policy. 

 

Interpretation and Definitions

Interpretation

The words of which the initial letter is capitalized have meanings defined under the following conditions. The following definitions shall have the same meaning regardless of whether they appear in singular or in plural.

Definitions

For the purposes of this Privacy Policy:

  • Account means a unique account created for You to access our Service or parts of our Service.

  • Company (referred to as either “the Company”, “We”, “Us” or “Our” in this Agreement) refers to Flairmo ApS, Lundeborgvej 3, 9220 Aalborg Ø.

  • Cookies are small files that are placed on Your computer, mobile device or any other device by a website, containing the details of Your browsing history on that website among its many uses.

  • Country refers to: Denmark

  • Device means any device that can access the Service such as a computer, a cellphone or a digital tablet.

  • Personal Data is any information that relates to an identified or identifiable individual.

  • Service refers to the Website.

  • Service Provider means any natural or legal person who processes the data on behalf of the Company. It refers to third-party companies or individuals employed by the Company to facilitate the Service, to provide the Service on behalf of the Company, to perform services related to the Service or to assist the Company in analyzing how the Service is used.

  • Usage Data refers to data collected automatically, either generated by the use of the Service or from the Service infrastructure itself (for example, the duration of a page visit).

  • Website refers to Flairmo, accessible from flairmo.dk

  • You means the individual accessing or using the Service, or the company, or other legal entity on behalf of which such individual is accessing or using the Service, as applicable.

 

Collecting and Using Your Personal Data

Types of Data Collected

Personal Data

While using Our Service, We may ask You to provide Us with certain personally identifiable information that can be used to contact or identify You. Personally identifiable information may include, but is not limited to:

  • Email address

  • First name and last name

  • Phone number

  • Address, State, Province, ZIP/Postal code, City

  • Usage Data

Usage Data

Usage Data is collected automatically when using the Service.

Usage Data may include information such as Your Device’s Internet Protocol address (e.g. IP address), browser type, browser version, the pages of our Service that You visit, the time and date of Your visit, the time spent on those pages, unique device identifiers and other diagnostic data.

When You access the Service by or through a mobile device, We may collect certain information automatically, including, but not limited to, the type of mobile device You use, Your mobile device unique ID, the IP address of Your mobile device, Your mobile operating system, the type of mobile Internet browser You use, unique device identifiers and other diagnostic data.

We may also collect information that Your browser sends whenever You visit our Service or when You access the Service by or through a mobile device.

Tracking Technologies and Cookies

We use Cookies and similar tracking technologies to track the activity on Our Service and store certain information. Tracking technologies used are beacons, tags, and scripts to collect and track information and to improve and analyze Our Service. The technologies We use may include:

  • Cookies or Browser Cookies. A cookie is a small file placed on Your Device. You can instruct Your browser to refuse all Cookies or to indicate when a Cookie is being sent. However, if You do not accept Cookies, You may not be able to use some parts of our Service. Unless you have adjusted Your browser setting so that it will refuse Cookies, our Service may use Cookies.
  • Flash Cookies. Certain features of our Service may use local stored objects (or Flash Cookies) to collect and store information about Your preferences or Your activity on our Service. Flash Cookies are not managed by the same browser settings as those used for Browser Cookies. For more information on how You can delete Flash Cookies, please read “Where can I change the settings for disabling, or deleting local shared objects?” available at Link
  • Web Beacons. Certain sections of our Service and our emails may contain small electronic files known as web beacons (also referred to as clear gifs, pixel tags, and single-pixel gifs) that permit the Company, for example, to count users who have visited those pages or opened an email and for other related website statistics (for example, recording the popularity of a certain section and verifying system and server integrity).

Cookies can be “Persistent” or “Session” Cookies. Persistent Cookies remain on Your personal computer or mobile device when You go offline, while Session Cookies are deleted as soon as You close Your web browser. You can learn more about cookies here: Cookies by TermsFeed Generator.

We use both Session and Persistent Cookies for the purposes set out below:

  • Necessary / Essential Cookies

    Type: Session Cookies

    Administered by: Us

    Purpose: These Cookies are essential to provide You with services available through the Website and to enable You to use some of its features. They help to authenticate users and prevent fraudulent use of user accounts. Without these Cookies, the services that You have asked for cannot be provided, and We only use these Cookies to provide You with those services.

  • Cookies Policy / Notice Acceptance Cookies

    Type: Persistent Cookies

    Administered by: Us

    Purpose: These Cookies identify if users have accepted the use of cookies on the Website.

  • Functionality Cookies

    Type: Persistent Cookies

    Administered by: Us

    Purpose: These Cookies allow us to remember choices You make when You use the Website, such as remembering your login details or language preference. The purpose of these Cookies is to provide You with a more personal experience and to avoid You having to re-enter your preferences every time You use the Website.

For more information about the cookies we use and your choices regarding cookies, please visit our Cookies Policy or the Cookies section of our Privacy Policy.

 

Use of Your Personal Data

The Company may use Personal Data for the following purposes:

  • To provide and maintain our Service, including to monitor the usage of our Service.

  • To manage Your Account: to manage Your registration as a user of the Service. The Personal Data You provide can give You access to different functionalities of the Service that are available to You as a registered user.

  • For the performance of a contract: the development, compliance and undertaking of the purchase contract for the products, items or services You have purchased or of any other contract with Us through the Service.

  • To contact You: To contact You by email, telephone calls, SMS, or other equivalent forms of electronic communication, such as a mobile application’s push notifications regarding updates or informative communications related to the functionalities, products or contracted services, including the security updates, when necessary or reasonable for their implementation.

  • To provide You with news, special offers and general information about other goods, services and events which we offer that are similar to those that you have already purchased or enquired about unless You have opted not to receive such information.

  • To manage Your requests: To attend and manage Your requests to Us.

  • For business transfers: We may use Your information to evaluate or conduct a merger, divestiture, restructuring, reorganization, dissolution, or other sale or transfer of some or all of Our assets, whether as a going concern or as part of bankruptcy, liquidation, or similar proceeding, in which Personal Data held by Us about our Service users is among the assets transferred.

  • For other purposes: We may use Your information for other purposes, such as data analysis, identifying usage trends, determining the effectiveness of our promotional campaigns and to evaluate and improve our Service, products, services, marketing and your experience.

We may share Your personal information in the following situations:

  • With Service Providers: We may share Your personal information with Service Providers to monitor and analyze the use of our Service, to contact You.
  • For business transfers: We may share or transfer Your personal information in connection with, or during negotiations of, any merger, sale of Company assets, financing, or acquisition of all or a portion of Our business to another company.
  • With Affiliates: We may share Your information with Our affiliates, in which case we will require those affiliates to honor this Privacy Policy. Affiliates include Our parent company and any other subsidiaries, joint venture partners or other companies that We control or that are under common control with Us.
  • With business partners: We may share Your information with Our business partners to offer You certain products, services or promotions.
  • With other users: when You share personal information or otherwise interact in the public areas with other users, such information may be viewed by all users and may be publicly distributed outside.
  • With Your consent: We may disclose Your personal information for any other purpose with Your consent.

Retention of Your Personal Data

The Company will retain Your Personal Data only for as long as is necessary for the purposes set out in this Privacy Policy. We will retain and use Your Personal Data to the extent necessary to comply with our legal obligations (for example, if we are required to retain your data to comply with applicable laws), resolve disputes, and enforce our legal agreements and policies.

The Company will also retain Usage Data for internal analysis purposes. Usage Data is generally retained for a shorter period of time, except when this data is used to strengthen the security or to improve the functionality of Our Service, or We are legally obligated to retain this data for longer time periods.

Transfer of Your Personal Data

Your information, including Personal Data, is processed at the Company’s operating offices and in any other places where the parties involved in the processing are located. It means that this information may be transferred to — and maintained on — computers located outside of Your state, province, country or other governmental jurisdiction where the data protection laws may differ than those from Your jurisdiction.

Your consent to this Privacy Policy followed by Your submission of such information represents Your agreement to that transfer.

The Company will take all steps reasonably necessary to ensure that Your data is treated securely and in accordance with this Privacy Policy and no transfer of Your Personal Data will take place to an organization or a country unless there are adequate controls in place including the security of Your data and other personal information.

Disclosure of Your Personal Data

Business Transactions

If the Company is involved in a merger, acquisition or asset sale, Your Personal Data may be transferred. We will provide notice before Your Personal Data is transferred and becomes subject to a different Privacy Policy.

Law enforcement

Under certain circumstances, the Company may be required to disclose Your Personal Data if required to do so by law or in response to valid requests by public authorities (e.g. a court or a government agency).

 

Other legal requirements

The Company may disclose Your Personal Data in the good faith belief that such action is necessary to:

  • Comply with a legal obligation
  • Protect and defend the rights or property of the Company
  • Prevent or investigate possible wrongdoing in connection with the Service
  • Protect the personal safety of Users of the Service or the public
  • Protect against legal liability

Security of Your Personal Data

The security of Your Personal Data is important to Us, but remember that no method of transmission over the Internet, or method of electronic storage is 100% secure. While We strive to use commercially acceptable means to protect Your Personal Data, We cannot guarantee its absolute security.

 

Children’s Privacy

Our Service does not address anyone under the age of 13. We do not knowingly collect personally identifiable information from anyone under the age of 13. If You are a parent or guardian and You are aware that Your child has provided Us with Personal Data, please contact Us. If We become aware that We have collected Personal Data from anyone under the age of 13 without verification of parental consent, We take steps to remove that information from Our servers.

If We need to rely on consent as a legal basis for processing Your information and Your country requires consent from a parent, We may require Your parent’s consent before We collect and use that information.

 

Links to Other Websites

Our Service may contain links to other websites that are not operated by Us. If You click on a third party link, You will be directed to that third party’s site. We strongly advise You to review the Privacy Policy of every site You visit.

We have no control over and assume no responsibility for the content, privacy policies or practices of any third party sites or services.

 

Changes to this Privacy Policy

We may update Our Privacy Policy from time to time. We will notify You of any changes by posting the new Privacy Policy on this page.

We will let You know via email and/or a prominent notice on Our Service, prior to the change becoming effective and update the “Last updated” date at the top of this Privacy Policy.

You are advised to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page.

 

Contact Us

If you have any questions about this Privacy Policy, You can contact us:

  • By email: info@flairmo.dk

  • By phone number: +45 53 71 72 20

Conditions of Sale and Delivery

Last updated: October 18, 2021

1. Preamble

1.1. Buyer’s acceptance of the offer from FLAIRMO ApS shall also mean acceptance of the General Conditions of Sale and Delivery set out below, which shall apply to the extent they are not deviating from any agreement in writing between the parties.

2. Product information

2.1. Information relating to technical specifications and prices indicated in manuals, leaflets, circulars, advertisements etc. are indicated as guidelines.
2.2. FLAIRMO ApS reserves the copyright and property of drawings, technical information, etc. submitted in connection with offers/contracts,
and of patents, trademarks, name of products, referring to the products sold FLAIRMO ApS.
2.3. FLAIRMO ApS reserves the right to modify the construction and technical specifications without notice.

 

3. Inspection, tests and approvals

3.1. In case inspection, and/or tests are required, these will be carried out at the plant in Aalborg, and the costs for such inspection shall be borne by the buyer.
3.2. In case approvals – other than those already carried out by FLAIRMO ApS – are required, the buyer shall give all necessary information and assistance, and he shall bear the corresponding costs.

 

4. Time and terms of delivery, passing of risks

4.1. The time indicated for delivery is the date at which the product are shipped from the plant in Aalborg. In case of delay, due to reasons other than those mentioned under Article 8 “Reliefs”, FLAIRMO ApS shall forthwith inform the buyer, and state the new date of dispatch, without this giving the buyer right to compensation or to cancel the contract.
4.2. In case the buyer anticipates that he will be unable to accept the delivery of the products, he shall forthwith inform FLAIRMO ApS, stating a new date for the delivery. In case the buyer fails to accept the delivery for reasons other than those mentioned under Article 8 “Reliefs”, FLAIRMO ApS shall be entitled to compensation for the loss suffered by reason of the buyer’s default.
4.3. Terms of delivery are Ex-works (EXW)
4.4. The risk shall pass in accordance with the International Rules for Interpretation of Trade Terms (INCOTERMS) in force at the date of formation of the contract. In case of EXW delivery, the risk will pass not later than when the products are handed over to the first carrier.

 

5. Payment, adjustment of purchase price

5.1. The payment shall be made according to the terms agreed between the parties. Where it is agreed that any part of the purchase shall fall due for payment only after the delivery, the buyer shall take out the usual transport insurance in respect of the products sold, for full value, and maintain such policy in force until payment has been made in full.
5.2. The goods shall remain the property of FLAIRMO ApS until payment has been made in full. In the case of delayed payment by the buyer, FLAIRMO ApS is entitled to charge interest for default, at a rate of 9 percentage points above official rate of discount of the Denmark’s National Bank.
5.3. In the event that after entering the contract, or after issuing the price list, custom export/import duties or other additional charges or costs directly caused by Government measures taken in Denmark or abroad, are imposed on raw materials, machinery components, etc. required for the performance of the contract – or in case collective bargaining results in increases in wages for instance, the buyer shall be liable to pay such increase over and above the price agreed.
5.4. Where the purchase price is agreed in a currency other than EURO, FLAIRMO ApS shall be entitled to adjustment of the purchase price in the event of any alteration to the rate of exchange of the agreed currency relative to EURO.

 

6. Product liability, consequential loss

6.1. FLAIRMO ApS shall not be liable for any damage to property caused by the products after they have been delivered and whilst they are in the possession of the buyer. Nor shall FLAIRMO ApS be liable for any damage to products manufactured by the buyer, or to products of which the FLAIRMO products form a part.
6.2. If FLAIRMO ApS incurs liability towards any third party for such damage to property as described under 6.1. the buyer shall indemnify, defend and hold FLAIRMO ApS harmless.

6.3. FLAIRMO ApS and the buyer shall be mutually obliged to let themselves be summoned to the Court of Aalborg, Denmark examining claims for such damages.
6.4. The limitation of FLAIRMO ApS’s liability in 6.1. above shall not apply where FLAIRMO ApS has been guilty of gross negligence.
6.5. Save as elsewhere stated in these conditions, there shall be no liability for either party towards the other party for loss of production, loss of profit, loss of use, loss of contracts or for any consequential, economic or indirect loss whatsoever.

 

7. Guarantee

7.1. Provided that the operational instructions have been carried out, and unless otherwise agreed, the duration of the guarantee is the period stipulated for each type of products, calculated from the date of shipment from the plant in Denmark. The guarantee applies to any faulty material or workmanship in new material.
7.2. Any guarantee claim will only be accepted if the claim is given in writing according to the procedure set up by the Quality Control Department of FLAIRMO ApS.
7.3. Normal wear and tear or deterioration shall not be termed as “defect”.
7.4. Modifications carried out by the buyer, without prior agreement in writing from FLAIRMO ApS, damages caused by violence, misuse, lack of repair and maintenance, incorrect repairs or use of unoriginal spare parts/oil, are not covered by the guarantee.
7.5. Costs of transportation of parts/equipment, travelling expenses/wages of the buyer´s technicians, are not covered by the guarantee.
7.6. On receipt of the claim, FLAIRMO ApS shall forthwith send replacement or repaired parts/equipments.
7.7. In case the replacement parts/equipment are shipped prior to the returning of the defective parts/equipment to FLAIRMO ApS, these will be invoiced – and credited in case the claim is accepted under the guarantee.
7.8. In case the defective parts/equipment are returned to FLAIRMO ApS prior to the replacement/repair, these parts/equipment shall be repaired or replaced, and returned to the buyer, free of charge (except 7.5. above) in case the claim is accepted under the guarantee.

 

8. Reliefs, force majeure

8.1. Industrial disputes, fire, mobilisation, requisition, embargo, currency restrictions, insurrection, strike, lock-out, shortage of transport, general shortage of materials, restrictions in the use of power or other circumstances which are beyond the control of the parties, shall be considered as cases of relief, in case they intervene after the formation of the contract, and impede its performance.
8.2. The party wishing to claim relief by reason of any of the mentioned circumstances, shall notify the other party in writing without delay, on the intervention and on the cessation thereof. The right of suspension of the contract shall only apply in case the effect of above reliefs could not have been foreseen at the time of the formation of the contract.
8.3. If Force Majeure prevents the buyer from fulfilling his obligations, he shall compensate FLAIRMO ApS for expenses incurred in securing and protecting the products.
8.4. In case the performance of the contract is suspended more than six months due to the conditions named under 8.1. above, either party shall be entitled to terminate the contract by notice in writing to the other party.

 

9. Legal provisions, applicable law

9.1. The Danish Law shall govern any question that might arise in connection with the business between FLAIRMO ApS and the buyer.
9.2. Danish Law shall determine any conflict. The court in Aalborg, Denmark shall settle any dispute.

Contact Us

If you have any questions about Terms & Conditions, You can contact us:

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