---
product_id: 135260747
title: "Nu Calgon Humidi-PRO Humidifier Treatment, white, single unit (4190-02)"
brand: "nu-calgon"
price: "€ 69.13"
currency: EUR
in_stock: true
reviews_count: 8
category: "Nu Calgon"
url: https://www.desertcart.sk/products/135260747-nu-calgon-humidi-pro-humidifier-treatment-white-single-unit-4190
store_origin: SK
region: Slovakia
---

# One season scale protection 25 gal/day capacity Vertical/horizontal install Nu Calgon Humidi-PRO Humidifier Treatment, white, single unit (4190-02)

**Brand:** nu-calgon
**Price:** € 69.13
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your air pure and your humidifier flawless — don’t let scale steal your comfort!

## Quick Answers

- **What is this?** Nu Calgon Humidi-PRO Humidifier Treatment, white, single unit (4190-02) by nu-calgon
- **How much does it cost?** € 69.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/135260747-nu-calgon-humidi-pro-humidifier-treatment-white-single-unit-4190)

## Best For

- nu-calgon enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Installation:** Fits seamlessly vertical or horizontal with included compression fittings.
- • **Effortless Scale Defense:** Protect your humidifier from mineral buildup all season long.
- • **Optimized for Efficiency:** Designed for 25 gallons/day humidifiers to keep performance peak.
- • **Temperature-Smart Design:** Operates perfectly between 40°F and 80°F for reliable use.
- • **Trusted Pro-Grade Quality:** Nu-Calgon’s industry-leading formula ensures professional-grade results.

## Overview

The Nu-Calgon Humidi-PRO 4190-02 is a professional-grade in-line cartridge scale inhibitor designed for 25 gallon/day humidifiers. It prevents mineral scale buildup for one full season, ensuring optimal humidifier performance. Easy to install vertically or horizontally with included compression fittings, it operates within a 40°F to 80°F temperature range and is intended for use in whole-house or central HVAC humidifier systems.

## Description

The Nu-Calgon 4190-02 Humidi-Pro keeps humidifiers clean and scale free for one season. Installs on the water line that supplies water directly to the humidifier. Equipped with compression fittings for easy installation and seasonal change-outs. For best results, humidifier should have a daily dump of water from the sump to diminish scale forming minerals. Install a new Humidi-Pro before each heating season. Operating temperature, min./ max, 40°F - 80°F. THE NU-CALGON 4190-02 HUMIDI-PRO IS FOR PROFESSIONAL USE AND SHOULD ONLY BE USED IN ACCORDANCE WITH ALL REGULATIONS AND PROPER SERVICE PRACTICES. PLEASE SEE PRODUCT LABEL OR CONTACT NU-CALGON DIRECTLY FOR USE INSTRUCTION. IT IS RECOMMENDED TO UTILIZE THE APPROPRIETE PPE (PERSONAL PROTECTIVE EQUIPMENT) DURING APPLICATION.

Review: Important add on for those with hard water! - If does what you really need! So important to minimize the scaling in a humidifier on your HVAC system. And it is easy to install. Just remember to change it every year.
Review: Humidifier water filter - Good quality, a must have

## Features

- The genuine Nu-Calgon 4190-02 is a single In-line Cartridge of Humidi-Pro and is considered a scale inhibitor for 25 Gallon/Day humidifiers.
- Humidi-Pro is not to be used on hot water lines and has usage temperatures of 40°F to 80°F.
- The Nu-Calgon 4190-02 can be installed vertically or horizontally and includes two 1/4 inch compression fittings.
- Nu-Calgon Humidi-Pro will inhibit scale for one season.
- Nu-Calgon, the brand you trust, provides quality chemicals and specialty products for professional use only in the air conditioning, refrigeration and heating markets.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008HQ7C14 |
| Best Sellers Rank | #170,649 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #349 in Humidifier Parts & Accessories #751 in Aromatherapy Diffusers |
| Brand | Nu-Calgon |
| Brand Name | Nu-Calgon |
| Capacity | 25 gallons_per_day |
| Color | White |
| Control Method | Push Button |
| Customer Reviews | 4.3 out of 5 stars 245 Reviews |
| Filter Type | Scale Inhibitor |
| Global Trade Identification Number | 00633841881240 |
| Included Components | Single Nu-Calgon 4190-02 Humidi-Pro (1 In-line Cartridge) |
| Item Dimensions D x W x H | 2"D x 6"W x 2"H |
| Item Shape | Cylinder |
| Item Type Name | Humidi-Pro |
| Manufacturer | Nu-Calgon Wholesaler, Inc. |
| Material | Treatment cartridge (contains scale-inhibitor media) |
| Model Name | Humidi-Pro (1 In-line Cartridge) |
| Model Number | 4190-02 |
| Number of Packs | 1 |
| Operation Mode | Manual |
| Other Special Features of the Product | Easy installation vertically or horizontally, includes compression fittings, operating temperature range 40 °F–80 °F, not for hot water lines, treats up to 25 gal/day capacity systems. |
| Part Number | 4190-02 |
| Power Source | Corded Electric |
| Product Dimensions | 2"D x 6"W x 2"H |
| Room Type | Whole-house or central HVAC humidifier systems. |
| Runtime | 720 hours |
| UPC | 681001419024 633841881240 667744956163 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Nu-Calgon
- **Capacity:** 25 G/day
- **Color:** White
- **Operation Mode:** Manual

## Images

![Nu Calgon Humidi-PRO Humidifier Treatment, white, single unit (4190-02) - Image 1](https://m.media-amazon.com/images/I/513ZHa4AVGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Important add on for those with hard water!
*by D***R on March 14, 2026*

If does what you really need! So important to minimize the scaling in a humidifier on your HVAC system. And it is easy to install. Just remember to change it every year.

### ⭐⭐⭐⭐⭐ Humidifier water filter
*by A***R on July 26, 2026*

Good quality, a must have

### ⭐⭐⭐⭐ Quality Humidifier Water Filter
*by E***T on December 20, 2025*

Needed to remove hard water deposits to prevent clogging the steam canister quickly. The expense is high due to the brass fittings are sold as a kit with the filter and are not needed once the first filter install is completed. After the first install of the filter, the brass fittings are not needed since using steel braided water lines with couplings that come with the braided water lines.

## Frequently Bought Together

- Nu-Calgon 4190-02 (1 In-line Cartridge) Humidi-Pro, Single Unit
- Homewerks 7252-25-14-PTC Ice Maker Supply Line and Humidifier Installation Kit 1/4-Inch x 25ft Push to Connect Poly Tube Universal Compatibility, Brass

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-11-02*