Finding a certified heat pump installer in the Netherlands

Finding a certified heat pump installer in the Netherlands

You have done your research. You know which type of heat pump suits your home, you have checked the costs, and you understand the ISDE subsidy. Now comes the decision that will determine whether your heat pump investment succeeds or becomes a headache: choosing the installer.

In the Netherlands, hundreds of companies call themselves heat pump installers. Some have a decade of experience, proper certifications, and a track record of satisfied customers. Others are central heating mechanics who attended a two-day training course and decided to branch out. From the outside, telling them apart is not easy.

This guide gives you the tools to separate the professionals from the amateurs.

Essential certifications: what your installer must have

Certifications in the Netherlands are not decorative. They represent legal requirements and quality standards that directly affect your installation quality, warranty, and subsidy eligibility.

F-gas certification (legally required)

Any installer working with refrigerants -- which covers virtually all heat pumps -- must hold an F-gas certificate (F-gassen certificaat). This is European law (EU Regulation 517/2014), not a recommendation. Without it, an installer may not legally install a refrigerant-containing heat pump.

The certificate proves competency in:

• Safe handling of refrigerants (R32, R290, R410A)
• Leak testing procedures
• Correct charging and recovery of refrigerant
• Environmental regulations for fluorinated greenhouse gases

Always ask for the F-gas certificate number. A trustworthy installer will produce it without hesitation.

STEK certification

STEK (Stichting Emissiepreventie Koudetechniek) is the Dutch supervisory body for refrigeration installations. A STEK-certified company undergoes regular audits on environmental compliance. It goes beyond basic F-gas certification and serves as an extra quality assurance.

InstallQ recognition

InstallQ is the quality mark for installation companies in the Netherlands. An InstallQ-recognised company meets standards for professional competence, business operations, and complaint handling. It is not legally required, but many heat pump manufacturers demand it for their extended warranty.

Daikin, for example, only provides the full 7-year warranty if installation is performed by an InstallQ-recognised company. Mitsubishi and Vaillant have similar policies. Choose a non-recognised installer and your warranty might be limited to 2 years instead of 5-7. That risk is not worth the few hundred euros you might save.

BRL 6000-21 (heat pump specific)

BRL 6000-21 is the assessment guideline specifically for the design, installation, and maintenance of heat pump systems. Installers certified under this standard have demonstrated they can not only mount the equipment but also correctly size and commission the entire system.

This is perhaps the most valuable certification to ask about. A heat pump that is technically perfect but incorrectly sized runs with a poor SCOP and costs you hundreds of euros per year in unnecessary electricity.

Red flags: when to walk away

Not every installer with a slick website delivers quality work. Watch for these warning signs.

Cannot show certifications. If an installer is vague about credentials or cannot produce certificates, move on. Full stop.

Quote without a home visit. A serious installer always visits your property first. The heat pump capacity, distribution system compatibility, outdoor unit placement, electrical panel status -- none of this can be assessed over the phone.

Suspiciously low price. If a quote is 30-40% below competitors, something is off. Either the heat pump is an obscure brand with no track record, or corners are being cut on installation quality, or additional costs will appear later.

Pressure to decide quickly. "This offer is only valid this week." "We have two slots left in our schedule." Recognise these tactics? Reputable installers are busy, but they do not use high-pressure sales techniques.

No experience with your home type. An installer who primarily does new construction may not be suitable for a 1930s home with old radiators. Ask specifically about experience with comparable situations.

Poor or no reviews. No Google reviews, no mentions on quality platforms, no references. That is suspicious. Every serious business has online reviews by now.

Ten questions to ask before accepting a quote

Not to be difficult, but to protect yourself and your investment.

1. What certifications does your company hold? (F-gas, STEK, InstallQ, BRL 6000-21)
2. How do you determine the required capacity for my home? A good answer references a heat loss calculation, not a rule of thumb.
3. Which brands do you install, and why? Companies that work with multiple brands can give more objective advice than one that exclusively sells Daikin or only Bosch.
4. What is included in the quote, and what is not? Wall penetration, electrical panel upgrade, hot water tank, old boiler removal -- these are items that sometimes "accidentally" get left out.
5. How long does the installation take? A hybrid heat pump is typically 1 day. An all-electric system with hot water tank takes 1.5-2 days. A ground source system with drilling takes 3-5 days.
6. Do you offer a warranty on the installation, separate from the manufacturer warranty? Minimum 2 years installation warranty is standard; 5 years is better.
7. Do you help with the ISDE subsidy application? An increasing number of installers handle this as standard. It saves you time and prevents errors. Full details in our subsidy guide.
8. What is the current waiting time? During peak season (September-December), wait times can reach 8-12 weeks.
9. Do you offer a maintenance contract? What does it cost and what does it include? A maintenance contract of 100-150 euros per year saves on long-term repair costs and keeps your warranty valid.
10. Can I see references or project photos from similar installations? An installer who takes pride in their work is happy to show it.

How to compare quotes properly

You have requested three quotes. Good. But not all quotes are created equal.

Compare on the same basis. Ensure all quotes cover the same heat pump type with comparable capacity. Comparing a 6 kW Daikin quote against a 10 kW Bosch quote is apples to oranges.

Look at the breakdown. A proper quote itemises: equipment cost, installation labour, materials (piping, brackets, hot water tank), VAT, and any additional costs. A quote that shows only a lump sum without specification is a red flag.

Look beyond the price. The cheapest quote is rarely the best. Check what warranty is offered, whether system commissioning is included (crucial for a good SCOP), and whether aftercare is part of the package.

Ask about commissioning. After installation, the system needs to be commissioned: setting the heating curves, optimising water temperature, programming the controls. This takes 2-4 extra hours and largely determines how efficiently your heat pump runs. Some installers include this as standard, others do not.

Our advice: do not automatically choose the cheapest installer. Choose the one who communicates clearly, answers your questions seriously, and is transparent about costs. That relationship will last years through maintenance and any issues that arise.

When is the best time to contact an installer?

Timing matters. The heat pump industry has a clear seasonal pattern.

Spring (March-June): Best time. Installers are less busy, wait times are shorter, and some offer spring promotions. Your heat pump is installed before the heating season begins.

Summer (July-August): Relatively quiet. Good for planning and comparing quotes, though some installers take summer holidays.

Autumn (September-November): Peak season. Everyone wants a heat pump before winter. Wait times increase, prices edge up.

Winter (December-February): Too late for this heating season, but a good time to request quotes for spring installation.

The ideal approach: request quotes in January-February, compare in March, install in April-May.

Our database: 623 installers across the Netherlands

On warmtepompkiezen.nl, we have compiled a directory of 623 heat pump installers across all 12 Dutch provinces and 311 municipalities. For each installer you can find:

• Location and service area
• Google rating
• Specialisations (hybrid, all-electric, ground source)
• Brands they work with
• Opening hours

Start browsing by province:

• Noord-Holland (85+ installers)
• Zuid-Holland (90+ installers)
• Noord-Brabant (75+ installers)
• Gelderland (65+ installers)
• Utrecht (50+ installers)

Or go directly to your gemeente for installers in your immediate area.

Key takeaways

• A certified installer has at minimum F-gas certification (legally required) and preferably InstallQ recognition and BRL 6000-21.
• Always ask for certificate numbers -- do not accept vague answers.
• Compare at least three quotes on the same basis: same type, same capacity, full breakdown.
• Do not choose the cheapest by default. Choose the installer with the best combination of price, quality, and communication.
• Schedule your installation in spring for the shortest wait and best pricing.

Frequently asked questions

How do I check if an installer has F-gas certification?

Ask the installer for their F-gas certificate number. You can verify this through the STEK register at sfrregistratie.nl. Every certified company is listed there.

Is InstallQ recognition mandatory for heat pump installation?

No, it is not legally required. However, many manufacturers (Daikin, Mitsubishi, Vaillant) require it for their extended warranty. Without InstallQ, your warranty may be limited to 2 years instead of 5-7.

How many quotes should I request?

At least three. The price difference between installers for the same heat pump can be up to 2,000 euros. More than four quotes usually does not provide much additional insight -- three is the sweet spot.

Can the installer also remove my old gas boiler?

Yes, most heat pump installers also handle boiler removal. Some charge extra for this (150-300 euros), while others include it in the total price. Ask specifically when requesting your quote.

How long does a heat pump installation take?

A hybrid heat pump: 1 day. An air-to-water heat pump: 1.5-2 days. A ground source heat pump: 3-5 days including drilling. Complex situations (heating system modifications, new piping) take longer.

What if I am not satisfied with the installation?

Discuss complaints with the installer first. If you cannot resolve the issue, InstallQ-recognised companies are subject to a disputes committee (geschillencommissie) where you can file a formal complaint. For non-recognised companies, you would need mediation or legal proceedings.

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• Heat pump subsidy 2026: ISDE application guide
• Best heat pump 2026: comparison by type and brand