Sustainability
The heating season is starting, gas prices are back in the news and perhaps your boiler is due for replacement. Then the inevitable question comes up: simply a new condensing boiler, or a hybrid heat pump alongside it this time? We install both, and we see in practice who a hybrid really pays off for — and who it doesn't (yet). An honest overview.
What exactly is a hybrid heat pump?
A hybrid heat pump is a combination of an electric air-to-water heat pump and your gas boiler. The heat pump extracts heat from the outside air and uses it to heat the central heating water — very efficiently, as long as it isn't too cold outside. When it gets freezing cold, or when you want to shower, the boiler steps in. A smart controller chooses the cheapest heat source at any given moment.
The result: in an average year the heat pump does around 60 to 80 percent of the heating, and your gas consumption drops by roughly half to two-thirds. You keep the certainty of the boiler for the coldest weeks and for hot water, without having to renovate the whole house.
Who is a hybrid suitable for?
A hybrid is the "intermediate step" that is most achievable for the majority of existing homes. You need roughly three things:
- Reasonable insulation. Energy label A to D, or at least double glazing and an insulated roof. The better insulated, the larger the heat pump's share.
- Radiators that can run at a lower temperature. A heat pump works most efficiently at a flow temperature of around 50 degrees. If your radiators are generously sized for that (or you have underfloor heating), you're fine. If not, enlarging one radiator is often enough.
- Space for the outdoor unit. A balcony, flat roof, garden or facade. In Amsterdam there's often something to consider here: with a homeowners' association (VvE) you need permission, and in protected cityscapes there are rules on placement. We help you think it through — there's often more possible than people expect.
Condensing boiler, hybrid or fully electric?
| Option | Gas consumption | Purchase (indication) | Suitable for | Subsidy |
|---|---|---|---|---|
| New condensing boiler | Remains, slightly lower | Lowest | Any home; poorly insulated homes | None |
| Hybrid heat pump + boiler | −50 to −70% | Medium | Existing homes with reasonable insulation | ISDE |
| Fully electric heat pump | Zero (gas-free) | Highest, often with modifications | Well-insulated homes, new builds, underfloor heating | ISDE |
For many Amsterdam homes from the 1930s to the 1990s, the hybrid is the most realistic step: a big saving, no major renovation and the boiler as a safety net. Fully gas-free is great, but usually first requires better insulation and larger emitters — otherwise the electricity bill ends up higher than the gas bill ever was.
Costs, subsidy and payback time
For a hybrid heat pump including installation, allow roughly a few thousand euros, depending on the capacity and whether your boiler can stay. The ISDE subsidy comes off that — a substantial amount you apply for from RVO after installation (we supply the required documents). Check the current conditions and amounts on rvo.nl; they are adjusted annually.
The payback time depends on your gas consumption and energy prices, but for an average household it's usually between six and ten years — and shorter if you have solar panels. After all, the heat pump runs largely during the day in the shoulder season, exactly when your panels produce power you'd otherwise export for a low compensation. Read our article on net-metering costs.
What does it mean for your current boiler?
Is your boiler younger than about eight years and well maintained? Then it can usually stay and we connect the heat pump to it. If the boiler is older or due for replacement, we combine the heat pump with a new, compact condensing boiler — it has to run far less, so it lasts longer too. Not sure whether your boiler can carry on? See how to tell when replacing pays off, or ask us during the consultation.
Already have a split air conditioner? Then you may already be heating partly electrically in the shoulder season. A hybrid heat pump goes a step further: it heats the whole house via your existing radiators, not just the room where the AC hangs.
Key takeaways
- Hybrid = the heat pump does 60-80% of the heating, the boiler steps in when it's cold and for hot water
- Suitable with reasonable insulation, radiators that can run at ~50 degrees and space for the outdoor unit
- Gas use drops 50-70%; ISDE subsidy lowers the purchase; payback usually 6-10 years, shorter with solar panels
- A boiler younger than ~8 years can stay; otherwise combine with a new compact condensing boiler
Honest advice for your home
Whether a hybrid pays off for you depends on your insulation, your radiators and your consumption — no two Amsterdam homes are the same. Our engineers work it out for you and will also tell you if an ordinary new condensing boiler is the better choice for you. Request a free consultation.
