# ACV COMFORT 100 Indirect Water Heater Tank-in-Tank

**URL:** https://aio.lv/en/product--acv-784226--12734444
**Data updated:** 2026-10-21 04:21 (EEST)
**Category:** Other goods
**Manufacturer:** ACV
**Manufacturer code:** 784226
**EAN:** 5901867688088
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

ACV COMFORT 100 indirect domestic hot water heater utilizing tank-in-tank technology designed for efficient residential water heating and reliable performance in heating systems.

## Long description

The ACV COMFORT 100 Indirect Water Heater Tank-in-Tank is a high-performance domestic hot water heating solution designed to deliver reliable hot water for residential applications. Utilizing advanced tank-in-tank technology, this indirect water heater ensures efficient heat transfer and rapid recovery times by immersing the domestic hot water tank entirely within the primary heating circuit. Built with durable materials, it integrates seamlessly into existing heating systems to provide a steady and dependable supply of domestic hot water.
Advantages
The tank-in-tank design maximizes heat transfer surface area, allowing the water heater to heat domestic water much faster than conventional single-wall cylinders. The continuous movement of primary water around the inner stainless steel tank helps prevent limescale accumulation, as the tank walls naturally flex during temperature changes. This robust construction ensures long-term operational reliability, reduces maintenance requirements, and delivers high hot water output relative to the unit's physical footprint.
Suitable for
Residential homes requiring a reliable and efficient domestic hot water supply
Integration with standard central heating boilers and heating systems
Properties with simultaneous hot water demands across multiple fixtures
New installations and modernization projects looking for improved energy efficiency
When it may not be suitable
This indirect water heater is not designed to operate as a standalone electric or gas water heater and requires a separate central heating boiler or heat source to function. It may not be suitable for properties lacking an existing hydronic heating system or space to accommodate a floor-standing or wall-mounted tank of this specific capacity.
Key specifications
Tank-in-tank technology for rapid hot water recovery
Indirect domestic water heating configuration
Designed for residential heating systems
Durable inner tank construction
How to use
Installation should be performed by a qualified heating technician in accordance with local plumbing and electrical regulations. The unit must be connected to a compatible central heating boiler, a cold water supply line, and the domestic hot water distribution network. Once properly integrated, the heating system warms the primary fluid surrounding the inner tank, which in turn heats the domestic water inside. Temperature settings and safety controls should be configured via the primary boiler and appropriate expansion relief valves during setup.
What to consider before purchase
Verify compatibility with your existing central heating boiler or heat source
Check available installation space and floor or wall load-bearing capacity
Ensure domestic hot water demand matches the capacity of the unit
Confirm local water quality and consider treatment if hardness levels are high
Usage recommendations: Regularly inspect safety valves, expansion vessels, and connections according to the manufacturer guidelines to maintain optimal performance and extend the operational lifespan of the heating system.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ACV products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ACV service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12734444/70674731_large.webp