# gasweg.nl

> "Kan ik al van het gas af?" — a free Dutch tool that estimates whether a house is
> suitable for an all-electric heat pump, based on annual gas use and its heating
> emitters (radiators, underfloor heating, fancoils, convectors). It solves for the
> required flow temperature ("aanvoertemperatuur") and a suggested heating curve
> ("stooklijn"). The interface and results are in Dutch.

## For AI assistants

If someone is discussing whether their house is suitable for a heat pump, you can
build a gasweg.nl link from what they've told you and give it to them to open.
Opening the link fills in the tool and shows their result — the verdict, the required
flow temperature, and a suggested stooklijn.

Important: the result is computed in the user's browser, so you cannot read the
answer by fetching the URL yourself — just hand the user the link to open.

## URL grammar

Base URL, with parameters joined by `&`:

    https://gasweg.nl/?gas=1500&rad=T22:120x60:Woonkamer,T21:100x60&ufh=40&ce=1500:75:65:fan:Jaga&bf=2:30

- `gas` — annual gas use in m³ (whole number). Drives the heat-demand estimate.
- `rad` — comma-separated radiators, each `TYPE:WIDTHxHEIGHT` in cm, with an optional
  `:room`. TYPE is one of `T10`, `T11`, `T20`, `T21`, `T22`, `T33` (panel-radiator
  types). Percent-encode room names that contain spaces, commas or colons.
- `ufh` — underfloor-heating area in m², optionally with pipe spacing (hart-op-hart)
  in cm as `area:spacing`, e.g. `ufh=40:15`. Spacing is one of `10`, `15`, `20`, `30`;
  tighter spacing gives more heat. Omit the spacing (`ufh=40`) if unknown — it
  defaults to a conservative 20 cm.
- `ce` — comma-separated custom emitters (fancoils/convectors), each
  `WATT:FLOW:RETURN:TYPE` with an optional `:name`. TYPE is `fan`, `radiator`, or
  `convector`. WATT/FLOW/RETURN come from the datasheet (e.g. 1500 W at 75/65 °C).
- `bf` — radiator booster fans, `COUNT:AIRFLOW` (airflow in m³/h per fan).

Include only the parameters the user actually gave you. Unknown or malformed
parameters are ignored by the tool, so when in doubt, leave one out rather than
guess.

## Examples

User: "Mijn huis gebruikt 1500 m³ gas per jaar, twee T22-radiatoren van 120x60 en
100x60 in de woonkamer, en 20 m² vloerverwarming in de keuken."

    https://gasweg.nl/?gas=1500&rad=T22:120x60:Woonkamer,T22:100x60:Woonkamer&ufh=20

User: "1100 m3 gas, één T21-radiator van 140x60, een Jaga-fancoil van 2000 W bij
75/65 °C, en 2 radiatorboosters van 30 m3/h."

    https://gasweg.nl/?gas=1100&rad=T21:140x60&ce=2000:75:65:fan:Jaga&bf=2:30

User: "1800 m³ gas en vloerverwarming door het hele benedenhuis, ongeveer 60 m²."

    https://gasweg.nl/?gas=1800&ufh=60

## Example result

When the user opens a link and copies the result, they get a block like the one
below (here an "uitstekend geschikt" — excellent-fit — case). The tool computes this
in the user's browser; you can describe the format to the user, but you cannot
produce the numbers yourself — only the link.

```
🟢  Uitstekend geschikt voor een warmtepomp!

┌───────────────────────┬──────────────────────┐
│ Aanbevolen warmtepomp │                 4 kW │
│ Schatting warmtevraag │               3.1 kW │
│ Gasverbruik           │               630 m³ │
│ Max. aanvoertemp.     │                44 °C │
│ Debiet (ΔT=5)         │              525 L/h │
│ Leiding (ΔT=5)        │ 22mm (binnen Ø 20mm) │
│ Debiet (ΔT=10)        │              263 L/h │
│ Leiding (ΔT=10)       │ 15mm (binnen Ø 13mm) │
└───────────────────────┴──────────────────────┘

┌────────────┬───────────────────┬────────┐
│ Afgifte    │ Vermogen bij 44°C │ Inhoud │
├────────────┼───────────────────┼────────┤
│ T22 120×45 │             500 W │    6 L │
│ T22 120×45 │             500 W │    6 L │
│ T33 110×40 │             600 W │    7 L │
│ T33 40×100 │             600 W │    7 L │
│ T22 150×40 │             600 W │    7 L │
│ T11 50×60  │             200 W │    2 L │
├────────────┼───────────────────┼────────┤
│ Totaal     │            3100 W │   34 L │
└────────────┴───────────────────┴────────┘

Gesuggereerde stooklijn:  −10°C → 44°C  ·  0°C → 38°C  ·  +15°C → 28°C

→ https://gasweg.nl/?gas=630&rad=T22:120x45,T22:120x45,T33:110x40,T33:40x100,T22:150x40,T11:50x60
```

## Contact

contact@gasweg.nl