---
product_id: 222161969
title: "Fernox 62436 Central Heating Protector F1 Express - 400ML"
brand: "fernox"
price: "€ 114.59"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.hr/products/222161969-fernox-62436-central-heating-protector-f1-express-400ml
store_origin: HR
region: Croatia
---

# 30-second quick dosing Eco-friendly, non-toxic formula Corrosion & limescale protection Fernox 62436 Central Heating Protector F1 Express - 400ML

**Brand:** fernox
**Price:** € 114.59
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Protect your heat, save your wallet, and never miss a cozy moment!

## Quick Answers

- **What is this?** Fernox 62436 Central Heating Protector F1 Express - 400ML by fernox
- **How much does it cost?** € 114.59 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/222161969-fernox-62436-central-heating-protector-f1-express-400ml)

## Best For

- fernox enthusiasts

## Why This Product

- Trusted fernox brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Conscious Formula:** Non-toxic and environmentally friendly for guilt-free maintenance
- • **Effortless Application:** Add via radiator adapter or filling loop in under 2 minutes
- • **Extend Boiler Lifespan:** Keeps your heating system efficient and running longer
- • **Universal Compatibility:** Safe for all metals including aluminum—no system left behind
- • **Fast-Track Heating Protection:** Doses in just 30 seconds for instant system defense

## Overview

Fernox 62436 Central Heating Protector F1 Express is a fast-acting, eco-friendly inhibitor that prevents corrosion and limescale in domestic heating systems. Compatible with all metals including aluminum, it doses in 30 seconds via radiator or filling loop, maintaining system efficiency and extending boiler life with minimal effort.

## Description

Protector F1 is a market leading inhibitor which protects against corrosion and limescale formation in domestic central heating systems. Protector F1 is suitable for use with all metals and materials commonly used in heating systems. For long-term protection ensure concentration levels are maintained and checked annually as part of the boiler or system service. Protector F1 is compatible with all other Fernox products. One 400ml can protect an average sized system (130 litres or up to 16 single radiators) and is added via a radiator or filling loop. Fernox Protector F1 Express can be dispensed directly into a radiator air vent or system filling loop using the appropriate special adapter supplied with the product. The whole process takes less than two minutes. In a single feed indirect cylinder, e.g. ‘Primatic’ or similar, potable water chemicals must be used. We recommend untreated or sludged systems are thoroughly cleaned and flushed in accordance with BS7593 and Benchmark using Fernox Cleaner F5 Express, before treating with Fernox Protector F1 Express, as existing debris can damage the installation.

Review: Only product I use - The only product I use for water treatment in a hydronic system.
Review: Does what it says, but you need a pH meter to check it - I used this in a 13-year-old boiler and it corrected the pH in range. Easy.

## Features

- Quick and convenient – doses in 30 seconds
- Add via a radiator adapter or filling loop supplied
- Protects against corrosion and limescale
- Non-toxic, environmentally friendly formulation suitable for use with all metals and materials, including aluminium
- Maintains system efficiency and extends boiler life

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B087VK28ZB |
| Best Sellers Rank | #702,927 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,311 in Heaters & Heater Accessories |
| Brand | Fernox |
| Customer Reviews | 4.3 4.3 out of 5 stars (26) |
| Date First Available | April 29, 2020 |
| Exterior | Aluminum |
| Item Weight | 15.8 ounces |
| Item model number | 62436 |
| Manufacturer | Fernox |
| Manufacturer Part Number | 62436 |
| Model | 62436 |
| Package Dimensions | 10 x 4.06 x 2.72 inches |

## Product Details

- **Brand:** Fernox
- **Manufacturer:** Fernox
- **Model Name:** 62436
- **Number of Items:** 1

## Images

![Fernox 62436 Central Heating Protector F1 Express - 400ML - Image 1](https://m.media-amazon.com/images/I/51MGemjuNlL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Only product I use
*by P***R on December 4, 2024*

The only product I use for water treatment in a hydronic system.

### ⭐⭐⭐⭐⭐ Does what it says, but you need a pH meter to check it
*by M***Y on November 22, 2024*

I used this in a 13-year-old boiler and it corrected the pH in range. Easy.

### ⭐⭐⭐⭐⭐ works well
*by A***R on November 20, 2024*

my husband buys this every fall to get the heating unit ready for winter.

## Frequently Bought Together

- Fernox 62436 Central Heating Protector F1 Express - 400ML
- Fernox 57882 F3 System Cleaner 1 Pint
- Fernox 56599 F1 500 ml Central Heating Protector

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**Shop now:** [https://www.desertcart.hr/products/222161969-fernox-62436-central-heating-protector-f1-express-400ml](https://www.desertcart.hr/products/222161969-fernox-62436-central-heating-protector-f1-express-400ml)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-09*