Instant water heater

An instant water heater, also known as a tankless water heater, is a device designed to heat water on demand as it flows through the unit. Unlike traditional storage tanks, these systems do not store water, which helps save space and reduces energy consumption by eliminating standby heat loss. They are commonly chosen for residential and commercial applications where space is limited or where hot water is needed only at specific points of use. These heaters provide a continuous supply of hot water, ensuring that users do not run out during extended periods of use. Modern models are equipped with precise temperature controls to maintain consistent output regardless of flow rate. They are an ideal solution for those looking to improve energy efficiency and modernize their plumbing infrastructure.

Use cases of instant water heaters

Instant water heaters are versatile devices suitable for various environments:

• Small apartments or studios where space for a large water tank is unavailable.
• Remote locations such as summer houses, garages, or workshops.
• Supplementary heating for specific sinks or showers located far from the main boiler.
• Commercial settings like public restrooms or office kitchenettes.

Types of instant water heaters

These devices are generally categorized by their power source and installation type:

• Electric instant water heaters: Compact and easy to install, requiring only a standard electrical connection and water supply.
• Gas instant water heaters: Often used for higher flow rates, these require proper ventilation and a gas supply line.
• Single-point units: Designed to serve one specific fixture, such as a kitchen sink.
• Multi-point units: More powerful systems capable of supplying hot water to multiple fixtures simultaneously.

Key features to consider

When evaluating different models, consider the following technical specifications:

• Power rating (kW): Determines the heating capacity and the temperature rise of the water.
• Flow rate (liters per minute): Indicates how much hot water the unit can provide at a given time.
• Temperature control: Digital displays and thermostatic valves allow for precise adjustments.
• Safety features: Look for overheating protection, pressure relief valves, and IP ratings for moisture resistance.

How to choose an instant water heater

Selecting the right unit depends on your specific requirements:

• Assess your hot water demand: Calculate how many fixtures will be used simultaneously to determine the required flow rate.
• Check electrical or gas capacity: Ensure your home's infrastructure can support the power requirements of the chosen model.
• Consider the climate: The temperature of the incoming cold water affects the unit's performance, especially in colder regions.
• Evaluate installation requirements: Verify if the unit is suitable for your existing plumbing configuration and wall space.

Which water heaters are the most popular and affordable in 2026?

The full list of popular models at affordable prices is available on this page. In 2026, the following models show high demand and an excellent price-to-quality ratio:

• Electric Faucet TERMOMAX TX42TFD 3600W instant water heater tap for 19.99€
• Ariston VELIS TECH WIFI 50 EU Electric Water Heater, 45L, 1500W, Horizontal/Vertical for 345.49€
• Ariston VELIS TECH WIFI 80 EU Electric Water Heater, 65L, 1500W, Horizontal/Vertical for 402.49€
• Ariston VELIS TECH WIFI 100 EU Electric Water Heater, 100L, 1500W, Horizontal/Vertical Installation for 425.99€

Why is it worth buying water heaters at AiO.lv?

At the AiO.lv online store, you can place an order at a great price with delivery across Latvia — to Riga, Daugavpils, Liepaja, Jurmala, Ventspils, and other cities, as well as throughout Europe. We offer products from leading manufacturers: ARISTON, Haier, CATA, TEESA, NOVEEN, stiebel eltron, KOSPEL, TESY, REGENT, NOVA TEC, TERMOMAX. When you shop with us, you get:

• official warranty and guaranteed quality;
• convenient payment options (including installment and credit);
• fast and reliable delivery across Latvia and to any EU country.

FAQ

Where can you find a water heaters with cheap prices?

You can buy cheaper at the AiO.lv online store. We offer competitive prices and regular discounts, so you always have the chance to find a great deal.

What is the delivery time for water heaters?

If you place your order today, delivery will take between 1 and 5 business days depending on the chosen method.

How long is the warranty period for water heaters?

Our store provides an official manufacturer’s warranty ranging from 12 to 36 months, depending on the model and brand. If needed, you can always contact our customer service department or the manufacturer’s authorized service center for support.

Are water heaters purchasable with leasing?

Yes, if the selected product costs more than €50. You can learn more about installment purchase options and the terms of application on the Payment page.

Can water heaters be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and throughout Europe. All product prices are shown with VAT included. In certain cases, a 0% VAT rate may apply — for example, when purchasing from other EU countries with a valid VAT number. We issue an invoice immediately after the order is placed, support BIS electronic invoices, and automatically generate all required accounting documents. To complete a purchase for a company, simply select the company profile during checkout.