Does ISDE fit your heat pump?
Does ISDE fit your heat pump?
ISDE is the Investment Subsidy for Sustainable Energy and Energy Saving (Dutch), the national fund for heat pumps among other measures.
A few light questions. We see whether it fits your situation and look up a notification code if you have one. RVO decides.
- Done in 2 minutes
- The result in plain language
- Free and no obligation
ISDE check
ISDE is the Investment Subsidy for Sustainable Energy and Energy Saving (Dutch), the national fund for heat pumps among other measures.
When ISDE fits
The conditions the desk looks at, in brief.
- Your own home
- Air-to-water
- Install first
- Code or papers
This is a first indication, not an award. List of August 2026. RVO decides.
List of August 2026
Find the notification code
Type or scroll to your brand, then the type. This month's code sits underneath. If it is not on there, that is not a refusal.
This is a first indication, not an award. List of August 2026. RVO decides.
When ISDE fits
The conditions the desk looks at, in brief.
Your own home
You own the home and you live in it. Renting has a different desk.
Air-to-water
Hybrid or all-electric. An air conditioner that blows warm air is out.
Install first
A building-installation firm fits it. Then you apply, within 24 months.
Code or papers
If the type is on the list, you enter the code. If not, send documents.
Who can apply is on ISDE for homeowners. How to fill it in is in our guide heat pump subsidy.
After the check: apply
Apply after installation, within 24 months. A decision usually follows within 8 weeks.
Confirm the conditions
Owner-occupied home, new air-to-water unit, home built before 2019 (or permit before 1 July 2018).
Find the notification code
Use the notification-code lookup or the official list. If your type is missing, keep the product documents.
Buy and have it installed
Have the unit installed. Keep the invoice and proof of payment.
Apply in eLoket
Sign in with DigiD. In Mijn RVO start a new application within 24 months of installation.
Wait for the decision
Usually within 8 weeks. Keep the reference number from the confirmation email.
What SolarFast does for you
We do not file the ISDE for you. The notification code is in the check and on page 5 of the quote. You apply in eLoket. How that works is in our heat pump subsidy guide.
Questions about the check
ISDE is the Investment Subsidy for Sustainable Energy and Energy Saving. Homeowners can use it for air-to-water heat pumps among other measures. This check gives a first indication.
No. If it is not on the list you may still apply with product documents. The desk then checks whether the unit meets the rules.
No. You fill in eLoket (Dutch) with DigiD. The notification code is on page 5 of the quote, or you search the type in this check.
No. Air-to-air falls outside ISDE. For an air-to-water heat pump, hybrid or all-electric, it can apply.
Then you quickly learn the homeowner desk is not for you. The landlord may have another route.
We use this month's list. The month sits on the notification-code lookup. RVO decides, not this check.
Each type has its own notification code. In the notification-code lookup you pick brand and type. In the quote the code is on page 5, in the subsidy information sheet.
Ready for the next step?
No heat pump yet? Request a no-obligation quote or book an advice call. If it is already in, you apply for ISDE yourself after installation.
