Tankless Water Heater Calculator

Accurate Sizing for Optimal Performance. Choosing the right Venus tankless water heater with our interactive sizing calculator based on climate, flow rate, and temperature.

Tankless • November 12, 2024

Choosing the Right VENUS Tankless Water Heater with Our Sizing Calculator

When it comes to selecting the perfect water heater, tankless models offer significant advantages. When selecting a tankless water heater, it’s important to ensure the model suits your home’s specific needs. With tankless systems offering on-demand hot water, energy savings, and a compact design, finding the right capacity is key. That’s where the Venus Tankless Water Heater Calculator comes in.

How the VENUS Tankless Water Heater Calculator Works

Our calculator is designed to take the guesswork out of selecting a tankless water heater. It simplifies the process of choosing the perfect model by taking into account essential factors and input details:

Inlet Water Temperature:

The temperature of your incoming cold water is influenced by your geographical location. For colder regions, inlet water temperature may be as low as 15°C, while in warmer areas, it can rise to 25°C. This temperature variance plays a critical role in determining the power (kW) required to heat the water to your desired level.

Shower Types and Flow Rates

Venus categorizes showers by their flow rates, which impact water consumption and heating requirements:

●Light (3–5 L/min): Ideal for low-flow showerheads or water-saving users.
●Medium (5–7 L/min): Common standard choice for most modern households.
●Comfort (8–10 L/min): Suitable for those who enjoy a fuller, richer water flow during showers.
●Luxury (10–12 L/min): Designed for high-end rain showers with multiple shower heads or heavy water usage.

Desired Hot Water Temperature

Based on personal preferences and usage, the desired output temperature can vary. Venus provides three primary options:

Warm (37°C)

Suitable for mild climates or quick, gentle washing.

Hot (40°C)

The most popular, comfortable setting for daily baths.

Steamy (42°C)

Ideal for luxurious, spa-like hot showers and winter chills.

The greater the temperature rise from your cold water inlet, the more power your Tankless Water Heater will need to maintain consistent warmth.

Technical Recommendations for Informed Decisions

In addition to capacity recommendations, our calculator goes a step further by providing crucial technical specifications that will assist you or your service technician in selecting and installing the correct model:

Rated Voltage: Ensures electrical compatibility with your home’s power line (Single Phase vs Three Phase).
Rated Pressure: Verifies that the unit handles your high-rise or pressure-pump water pressure requirements.
Wiring Size: Helps your electrician select the appropriate gauge copper cables for fire-safe operation.
Rated Current: Ensures the correct MCB/breaker sizing for optimal functioning without tripping.

Two Sizing Methods in Our Calculator

1) Based on Climate, Desired Temperature, and Shower Type:
Simplifies the selection process by tailoring recommendations based on your local climate, desired bath temperature, and shower flow rate to find the exact kW rating you need.

2) Based on Power (kW) of Your Chosen Model:
If you already have a specific model or power capacity in mind, this mode calculates the exact flow rate and shower experience you can expect across different seasons.

A High-Value Tool for Technicians & Architects

Benefits for Technicians: Provides precise flow rate curves, wire sizing, and breaker ratings so technicians can carry out quick, error-free installations with confidence.

Invaluable for Architects & Designers: When designing custom bathrooms and premium residences, architects can calculate electrical requirements upfront, ensuring sleek aesthetic integration and sufficient power allocation during construction.

Energy Efficiency & Standby Savings: Unlike bulky storage geysers that heat and reheat water throughout the day, tankless heaters activate purely on demand, cutting standby thermal losses and reducing electricity bills.

Explore Our Range of Venus Tankless Water Heaters

QUIK - QU55 (5.5 kW): Ideal for small households, kitchen sinks, or hand-washing stations. Extremely compact and space-saving.
QUIK - QU75 (7.5 kW): Mid-sized powerhouse providing continuous hot water for standard showerheads in apartments and villas.
QUIK - QU90, 123, 153, 183, 243 (9 kW to 24 kW): High-capacity multipoint three-phase units engineered for high-flow rain showers, luxury villas, and commercial hot water needs.

Try the Venus Tankless Sizing Calculator Online

Calculate the exact kW rating and ideal model for your bathrooms in just 3 easy steps.

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