How Big Gas Hot Water Heater Do You Need?

What Size of Gas Hot Water Heater Do You Need?

Choosing the right size (measured in liters per minute, L/min) ensures your gas hot water heater meets daily needs without waste for your whole family. Based on 13+ years of field experience, here's GASTEK's quick guide:

Hot water output capacity (Liter/min) Recommendations

-**6L/min or below**：

Ideal for single-point use (e.g., kitchen sinks, laundry).

-**8L/min**：

Good for a small showerhead comfortably.

-**10L/min**：

Perfect for one standard shower (rain showerheads included).

-**12L/min**：  

Supports large showerheads for a spa-like experience.

-**14L/min**：  

Runs **1 shower + 1 faucet** simultaneously (e.g., bathroom + kitchen).

Multi-Point System simultaneously? Go Bigger Gas Hot Water Heater

Add **2-4L/min** for each additional hot water point. For example:

-2 showers + kitchen or 1 bathtub →16-20L/min

-3 bathrooms or 1 bathtub → 24L/min+

Key Considerations

⚠️️**Pipe Layout**: Long pipe runs between heater and taps may require higher capacity gas hot water heater.

⚠️️**Safety**: Ensure proper venting.

**Top Picks from GASTEK**：

- Single bathroom:**GWH-10L**(10L/min, compact wall-mount gas hot water heater)

- Family homes:**GWH-24L**(24L/min fan-forced gas hot water heater)