NIAG

What NIAG does

NIAG (Nederlandse Installatie AdviesGroep) is an independent Dutch installation engineering advisory firm headquartered in Dronten, Netherlands, providing expert advice on building ventilation, heating, and energy supply systems. Founded in 1998 and founder-owned by Director Arthur van Wijk, the firm operates with a team of approximately nine members and serves municipalities, healthcare institutions, cultural and heritage organizations, and commercial enterprises throughout the Netherlands. NIAG's service portfolio consists of six integrated modules — Advies (Advice), Ontwerp (Design), Onderhoud (Maintenance), Troubleshooting, Controle (Control), and Bouwbegeleiding (Construction Guidance) — covering the full project lifecycle from initial assessment through design, implementation oversight, and multi-year maintenance planning.

The firm's technical methodology is built on independence from contractors and installers, life-cycle cost analysis calibrated for approximately 30-year installation lifespans, and building simulation models validated against historical gas and electricity consumption data. Distinctive capabilities include the Dyseco AI-driven self-learning dynamic climate control system designed for museums, borehole thermal energy storage (WKO) system design with ice-cell variants, ionization-based air purification, and integrated sustainability reporting that combines building-technical and installation-technical measures with heritage preservation considerations. NIAG's documented project outcomes include a 72% CO2 emission reduction and 46% electricity savings at Gemeentewerf Kampen, and projected 50%+ annual energy savings with sub-10-year payback at the Zuiderbad Amsterdam swimming pool.

NIAG generates revenue through project-based professional advisory fees on a direct sales motion — competitive tenders (particularly municipal), direct client engagements, and organic referrals driven by its self-described position as the leading independent installation advisory bureau in the Netherlands. The firm operates without external funding and is not backed by venture capital or private equity. Notable clients include Gemeente Kampen, Gemeente Amsterdam (Zuiderbad), Gemeente Oldebroek, Centraal Museum Utrecht, NEMO Science Museum, Theater ZIMIHC, Zorggroep Noorderboog, Zorgcentrum Talma Urk, Dopper, and Pride Mobility Products. Strategic partnerships include a 2024 consortium with NIBE (Utrecht) and OOM Advies (Den Haag) on the Rijksdienst voor het Cultureel Erfgoed (RCE)-commissioned Verduurzaming Monumenten program covering 14 monumental buildings nationally.

Name

NIAG

Legal name

NIAG (Nederlandse Installatie AdviesGroep)

Website

https://niag.nl

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1–10 employees

Short description

NIAG is an independent Dutch installation engineering advisory firm providing expert advice on building ventilation, heating, and energy systems to municipalities, healthcare institutions, cultural venues, and commercial clients throughout the Netherlands.

Ownership category

akta.pro rank

Product category

Building Engineering / HVAC Advisory Services

NAICS

Environmental Consulting Services (54162)

akta.pro industry

PRIMARYEUAMANAB

Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Policy & Regulatory Consulting for Renewables

Keywords

• Building installation advisory
• HVAC consulting services
• Sustainable building climate
• Energy retrofit consulting
• Heritage building engineering

Headquarters

HQ city

Dronten

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Installatieadvies en consultancy: NIAG generates revenue through professional advisory fees for installation advice, design, construction supervision, troubleshooting, and maintenance planning services. Revenue is project-based and scale varies by project scope, complexity, and client type (municipalities, healthcare institutions, cultural institutions).

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

NIAG is an independent Dutch installation engineering advisory firm that provides professional advice, design, maintenance planning, troubleshooting, control, and construction supervision services for building climate systems. The firm specializes in sustainable ventilation, heating, and energy solutions for buildings — including heritage monuments — and operates fully independently from contractors and installers to ensure unbiased recommendations that minimize total cost of ownership and CO2 emissions.

Product overview

NIAG is a Dutch installation advice bureau offering a comprehensive suite of consulting services for building climate systems. The portfolio consists of six integrated service modules: Advies (Advice) for initial consultation and needs assessment, Ontwerp (Design) for creating detailed installation plans, Onderhoud (Maintenance) for long-term maintenance planning, Troubleshooting for diagnosing problems, Controle (Control) for quality verification, and Bouwbegeleiding (Construction Guidance) for overseeing implementation. These services are designed to work together as a complete project lifecycle offering, from initial advice through design, implementation, and ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Advies (Installation Advice) Professional installation advisory service for sustainable indoor climate, beginning with client needs assessment and producing customized climate control system recommendations based on building lifespan and desired energy savings. For building owners, municipalities, healthcare institutions, and cultural organizations.
• Ontwerp (Installation Design)
• Onderhoud (Multi-year Maintenance Plan)
• Troubleshooting (Installation Assessment)
• Controle (Installation Control & Verification)
• Bouwbegeleiding (Construction Guidance)

Quantifiable outcome

• 72% CO2 emission reduction and 46% electricity savings (26,500 kWh) at Gemeentewerf Kampen
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature6 records

Partnerships

Three partnerships are on record, tiered core and minor.

• NIBE (Utrecht)coreStrategic or Co-development PartnerNIAG is a partner in the 'Verduurzaming Monumenten in Maatschappelijk Vastgoed' (Sustainability of Monuments in Social Real Estate) program, jointly with NIBE from Utrecht, OOM Advies from The Hague, and commissioned by the Rijksdienst voor het Cultureel Erfgoed (RCE). The program provides sustainability advice to 14 monumental buildings across the Netherlands, integrating heritage, sustainability, building technology, and installation engineering expertise.
• OOM Advies (Den Haag)coreStrategic or Co-development PartnerNIAG collaborates with OOM Advies as a co-partner in the RCE-commissioned monument sustainability program, contributing multidisciplinary expertise in heritage-compatible installation techniques alongside OOM Advies's sustainability consulting capabilities.
• Hylkema Erfgoed (Utrecht)minorImplementation/ SI/ Consulting PartnerFor the Centraal Museum Utrecht energy scan, NIAG partnered with Hylkema Erfgoed from Utrecht for the building-technical analysis, particularly addressing heritage aspects. The collaboration produced an integrated sustainability report covering both building technology and installation technology, with heritage preservation as an integral consideration.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Arcadis: Global design, engineering, and sustainability consultancy with a major Dutch presence and significant buildings/sustainability capabilities. Competes with NIAG on large public-sector sustainability mandates but is far broader in scope.
• Sweco: Nordic-headquartered European engineering consultancy with strong Dutch operations in sustainable buildings and energy. Overlaps with NIAG in installation and energy advisory, but operates across many more segments and geographies.
• Witteveen+Bos: Dutch engineering firm with sustainability and buildings expertise, frequently competing on Dutch public-sector tenders. Comparable advisory capabilities but a much wider sectoral and geographic footprint than NIAG.
• Royal HaskoningDHV: Large global engineering consultancy with a Dutch heritage and substantial sustainability and buildings practice. Overlaps with NIAG in building energy and sustainability advisory but serves a much broader portfolio across many sectors.

Others

• Merosch: Dutch environmental and sustainability advisory firm working with municipalities and developers on energy transition projects. Adjacent to NIAG in environmental advisory but broader and less specialized in HVAC/installation design.
• ABT (Adviesbureau voor Bouwtechniek): Dutch engineering consultancy with strong building-services and sustainability capabilities. Adjacent to NIAG in serving Dutch building projects, but more focused on structural and general building engineering than installation advisory.

Direct peers

• Deerns Nederland: Dutch building services engineering consultancy specializing in HVAC, sustainability, and energy performance. Directly comparable in offering independent installation engineering advice to building owners and public-sector clients.
• Nieman Raadgevend Ingenieurs: Leading Dutch building installation and sustainability consultancy. Nieman directly competes with NIAG in independent installation advisory for government, healthcare, and cultural-sector clients across the Netherlands.
• DWA Installatie- en Energieadvies: Dutch installation and energy advisory firm focused on sustainable building installations. Overlaps with NIAG on energy surveys, sustainability studies, and installation design for Dutch municipalities and developers.
• DGMR / ADV Group: Dutch engineering consultancy with strong installation and building acoustics expertise. Comparable in offering independent technical advice on building climate systems and energy efficiency to Dutch public and private clients.

Market position

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/niag

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NIAG