Advice for a flat built before 1975
Insulate first, then hybrid
Your home still loses a lot of heat. Have the cavity walls and floor insulated first (often €1,500 – 3,000). After that a hybrid heat pump provides most of the heat. Your boiler only helps out when it freezes. In a flat the owners' association (VvE) has a say too, as does the spot for the outdoor unit.
- Output
- 4 kW
- Flow temperature
- 55 – 65 °C
- Price incl. installation and VAT
- € 6.250
- ISDE subsidy, approx.
- − € 1.925
- You pay net
- € 4.325
Gas use per year
You save about €450 a year on your energy bill.
Advice for a flat from 1975 – 1991
Hybrid heat pump
The heat pump heats your home for most of the year. Your boiler stays for the coldest days and for hot water. In a flat the owners' association (VvE) has a say too, as does the spot for the outdoor unit.
- Output
- 4 kW
- Flow temperature
- 45 – 55 °C
- Price incl. installation and VAT
- € 6.250
- ISDE subsidy, approx.
- − € 1.925
- You pay net
- € 4.325
Gas use per year
You save about €380 a year on your energy bill.
Advice for a flat from 1992 – 2014
All-electric heat pump
Often you can come off gas completely, sometimes with a few larger radiators. At the survey we work it out room by room. In a flat the owners' association (VvE) has a say too, as does the spot for the outdoor unit.
- Output
- 5 kW
- Flow temperature
- 40 – 45 °C
- Price incl. installation and VAT
- € 11.400
- ISDE subsidy, approx.
- − € 2.150
- You pay net
- € 9.250
Gas use per year
You save about €750 a year on your energy bill.
Advice for a flat built after 2015
All-electric heat pump
Well insulated and often underfloor heating already: a heat pump with a cylinder replaces your boiler completely. In a flat the owners' association (VvE) has a say too, as does the spot for the outdoor unit.
- Output
- 4 kW
- Flow temperature
- 30 – 35 °C
- Price incl. installation and VAT
- € 10.900
- ISDE subsidy, approx.
- − € 1.925
- You pay net
- € 8.975
Gas use per year
You save about €600 a year on your energy bill.
Advice for a terraced house built before 1975
Insulate first, then hybrid
Your home still loses a lot of heat. Have the cavity walls and floor insulated first (often €1,500 – 3,000). After that a hybrid heat pump provides most of the heat. Your boiler only helps out when it freezes.
- Output
- 4 kW
- Flow temperature
- 55 – 65 °C
- Price incl. installation and VAT
- € 6.250
- ISDE subsidy, approx.
- − € 1.925
- You pay net
- € 4.325
Gas use per year
You save about €590 a year on your energy bill.
Advice for a terraced house from 1975 – 1991
Hybrid heat pump
The heat pump heats your home for most of the year. Your boiler stays for the coldest days and for hot water.
- Output
- 4 kW
- Flow temperature
- 45 – 55 °C
- Price incl. installation and VAT
- € 6.250
- ISDE subsidy, approx.
- − € 1.925
- You pay net
- € 4.325
Gas use per year
You save about €520 a year on your energy bill.
Advice for a terraced house from 1992 – 2014
All-electric heat pump
Often you can come off gas completely, sometimes with a few larger radiators. At the survey we work it out room by room.
- Output
- 6 kW
- Flow temperature
- 40 – 45 °C
- Price incl. installation and VAT
- € 11.900
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 9.525
Gas use per year
You save about €900 a year on your energy bill.
Advice for a terraced house built after 2015
All-electric heat pump
Well insulated and often underfloor heating already: a heat pump with a cylinder replaces your boiler completely.
- Output
- 5 kW
- Flow temperature
- 30 – 35 °C
- Price incl. installation and VAT
- € 11.400
- ISDE subsidy, approx.
- − € 2.150
- You pay net
- € 9.250
Gas use per year
You save about €720 a year on your energy bill.
Advice for an end-of-terrace built before 1975
Insulate first, then hybrid
Your home still loses a lot of heat. Have the cavity walls and floor insulated first (often €1,500 – 3,000). After that a hybrid heat pump provides most of the heat. Your boiler only helps out when it freezes.
- Output
- 5 kW
- Flow temperature
- 55 – 65 °C
- Price incl. installation and VAT
- € 6.650
- ISDE subsidy, approx.
- − € 2.150
- You pay net
- € 4.500
Gas use per year
You save about €690 a year on your energy bill.
Advice for an end-of-terrace from 1975 – 1991
Hybrid heat pump
The heat pump heats your home for most of the year. Your boiler stays for the coldest days and for hot water.
- Output
- 5 kW
- Flow temperature
- 45 – 55 °C
- Price incl. installation and VAT
- € 6.650
- ISDE subsidy, approx.
- − € 2.150
- You pay net
- € 4.500
Gas use per year
You save about €590 a year on your energy bill.
Advice for an end-of-terrace from 1992 – 2014
All-electric heat pump
Often you can come off gas completely, sometimes with a few larger radiators. At the survey we work it out room by room.
- Output
- 8 kW
- Flow temperature
- 40 – 45 °C
- Price incl. installation and VAT
- € 13.400
- ISDE subsidy, approx.
- − € 2.825
- You pay net
- € 10.575
Gas use per year
You save about €990 a year on your energy bill.
Advice for an end-of-terrace built after 2015
All-electric heat pump
Well insulated and often underfloor heating already: a heat pump with a cylinder replaces your boiler completely.
- Output
- 6 kW
- Flow temperature
- 30 – 35 °C
- Price incl. installation and VAT
- € 11.900
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 9.525
Gas use per year
You save about €780 a year on your energy bill.
Advice for a semi-detached built before 1975
Insulate first, then hybrid
Your home still loses a lot of heat. Have the cavity walls and floor insulated first (often €1,500 – 3,000). After that a hybrid heat pump provides most of the heat. Your boiler only helps out when it freezes.
- Output
- 6 kW
- Flow temperature
- 55 – 65 °C
- Price incl. installation and VAT
- € 7.050
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 4.675
Gas use per year
You save about €790 a year on your energy bill.
Advice for a semi-detached from 1975 – 1991
Hybrid heat pump
The heat pump heats your home for most of the year. Your boiler stays for the coldest days and for hot water.
- Output
- 6 kW
- Flow temperature
- 45 – 55 °C
- Price incl. installation and VAT
- € 7.050
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 4.675
Gas use per year
You save about €690 a year on your energy bill.
Advice for a semi-detached from 1992 – 2014
All-electric heat pump
Often you can come off gas completely, sometimes with a few larger radiators. At the survey we work it out room by room.
- Output
- 10 kW
- Flow temperature
- 40 – 45 °C
- Price incl. installation and VAT
- € 14.900
- ISDE subsidy, approx.
- − € 3.275
- You pay net
- € 11.625
Gas use per year
You save about €1,110 a year on your energy bill.
Advice for a semi-detached built after 2015
All-electric heat pump
Well insulated and often underfloor heating already: a heat pump with a cylinder replaces your boiler completely.
- Output
- 8 kW
- Flow temperature
- 30 – 35 °C
- Price incl. installation and VAT
- € 13.400
- ISDE subsidy, approx.
- − € 2.825
- You pay net
- € 10.575
Gas use per year
You save about €870 a year on your energy bill.
Advice for a detached house built before 1975
Insulate first, then hybrid
Your home still loses a lot of heat. Have the cavity walls and floor insulated first (often €1,500 – 3,000). After that a hybrid heat pump provides most of the heat. Your boiler only helps out when it freezes.
- Output
- 6 kW
- Flow temperature
- 55 – 65 °C
- Price incl. installation and VAT
- € 7.050
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 4.675
Gas use per year
You save about €1,070 a year on your energy bill.
Advice for a detached house from 1975 – 1991
Hybrid heat pump
The heat pump heats your home for most of the year. Your boiler stays for the coldest days and for hot water.
- Output
- 6 kW
- Flow temperature
- 45 – 55 °C
- Price incl. installation and VAT
- € 7.050
- ISDE subsidy, approx.
- − € 2.375
- You pay net
- € 4.675
Gas use per year
You save about €930 a year on your energy bill.
Advice for a detached house from 1992 – 2014
All-electric heat pump
Often you can come off gas completely, sometimes with a few larger radiators. At the survey we work it out room by room.
- Output
- 12 kW
- Flow temperature
- 40 – 45 °C
- Price incl. installation and VAT
- € 15.900
- ISDE subsidy, approx.
- − € 3.725
- You pay net
- € 12.175
Gas use per year
You save about €1,380 a year on your energy bill.
Advice for a detached house built after 2015
All-electric heat pump
Well insulated and often underfloor heating already: a heat pump with a cylinder replaces your boiler completely.
- Output
- 10 kW
- Flow temperature
- 30 – 35 °C
- Price incl. installation and VAT
- € 14.900
- ISDE subsidy, approx.
- − € 3.275
- You pay net
- € 11.625
Gas use per year
You save about €1,050 a year on your energy bill.
An estimate based on average homes. At the survey we work it out exactly for your home.
Stefan connects a hybrid heat pump in Bergeind. Inside, the boiler is still there for the coldest days.
Breakdown line · day and night
Cold house?
Even in the middle of the night, someone picks up.
06 12345678With a service plan you pay no call-out charge.
ISDE subsidy 2026
€ 1.925
back on a 4 kW hybrid heat pump. We fill in the application with you.
How the subsidy worksOur craft, in four parts
Four specialisms, one team. We commission every installation ourselves and look after it afterwards.
All servicesHeat pump
Hybrid or all-electric, to suit your insulation.
- Hybrid from €6,250
- Subsidy sorted together
- Fitted in one to three days
Boiler
Replaced in one day, ready for what's next.
- Combi boiler from €2,295
- Old boiler taken away
- Commissioning included
Ventilation
Mechanical ventilation and MVHR, quiet and balanced.
- Unit replaced €695
- MVHR with heat recovery
- Measurement report on completion
Servicing and breakdowns
One monthly fee, we keep track of the service.
- From €12.50 a month
- Breakdown within 24 hours
- All common brands
Lower temperature. Just as warm.
An old boiler sends water at 70 °C to your radiators. A heat pump is most efficient at around 35 °C. The lower that flow temperature, the less electricity. That's why it all starts with measuring.
Maintenance
€12.50/ month
We remember the service. You don't have to.
- Yearly service
- Flue gas test and CO check
- No call-out charge for breakdowns
- Breakdown dealt with within 24 hours
From check to warm home
- 01Heat checkTwo minutes, online
- 02The survey at your homeFree, 60 to 90 minutes
- 03Advice and fixed priceWithin 3 working days
- 04InstallationOne to three working days
Fifteen engineers, all on our own payroll
In 2009 the first Stroomlijn van hit the road, with Egbert at the wheel. Now we have fifteen accredited engineers, all employed by us. We arrive at the agreed time, agree the price in advance and sweep the floor afterwards.
Meet the teamOften asked of our engineers
Is a heat pump right for my home?
Your insulation and radiators decide most of it. The heat check gives you a first idea. At the free survey we work it out room by room. If your home isn't ready yet, the advice will simply say so.
Hybrid or all-electric: what's the difference?
A hybrid heat pump works together with your boiler. The boiler helps out when it freezes and provides hot water. All-electric replaces the boiler completely, with a cylinder for hot water.
How much ISDE subsidy will I get?
For a heat pump in 2026 you get a fixed amount plus an amount per kW. For a 4 kW hybrid that's about €1,925. We work out the exact amount in your quote.
Can I still buy a new gas boiler?
Yes, you can. We do look with you at whether a hybrid heat pump would be smarter in the long run. Every boiler we fit is ready for one.
How quickly does an engineer come out for a breakdown?
With a service plan we deal with your breakdown within 24 hours, often the same day in winter. The breakdown line is open day and night.
We install and service
- Remeha
- Vaillant
- Intergas
- Daikin
- NIBE
- Itho Daalderop
First the measurements, then the price
An adviser visits for free and measures up your home. Three working days later you get one price, with the subsidy already deducted.