---
product_id: 154778224
title: "testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe"
brand: "testo"
price: "$4862"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/154778224-testo-300-combustion-analyzer-hvac-kit-residential-combustion-leak-tester
store_origin: NZ
region: New Zealand
---

# HD smart display 6-year sensor life Measures CO & O2 testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe

**Brand:** testo
**Price:** $4862
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate Your Efficiency Game!

## Quick Answers

- **What is this?** testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe by testo
- **How much does it cost?** $4862 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/154778224-testo-300-combustion-analyzer-hvac-kit-residential-combustion-leak-tester)

## Best For

- testo enthusiasts

## Why This Product

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

## Key Features

- • **Complete Kit:** Comes with long-life sensors, spare combustion probes, filters, and rugged hardshell case for ultimate convenience.
- • **Future-Ready:** Optional NO sensor and easyHeat software ensure your analyzer is equipped for evolving needs.
- • **Intuitive Interface:** Large HD smart touch display provides a clear overview of all measurements at a glance.
- • **User-Friendly Design:** Start measuring instantly with a single button press and enjoy hands-free operation with strong back magnets.
- • **Precision Performance:** Accurately measures CO, O2, temperature, draft, and differential pressure for optimal heating system efficiency.

## Overview

The testo 300 I Residential and Commercial Combustion Analyzer Kit is a state-of-the-art tool designed for precise measurement of flue gas, draft, and CO levels in heating systems. With a user-friendly interface, durable sensors, and a complete set of accessories, it’s the perfect solution for professionals seeking reliability and accuracy in combustion analysis.

## Description

testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe

## Features

- Efficient: The combustion testing tool reliably measures the carbon monoxide and O2 level of furnaces and boilers, as well as temperature, draft and differential pressure
- Durable: The flue gas meter is equipped with an extremely sensitive CO and O2 sensor with up to 6 years of life expectancy and a measuring range up to 4,000 ppm
- Easy application: Start measuring from standby mode at the touch of a button. Extra strong magnets at the back of the meter enable a hands free and secure measuring operation
- Intuitive: Thanks to the large HD smart touch display with a clearly structured measurement menu, the flue gas detector offers all measurements at one glance
- Complete Set: Includes long life O2 and CO sensor, retrofittable NO Sensor, spare combustion probes and filters, rugged hardshell case and easyHeat software

## Product Details

- **Brand:** Testo
- **Style:** Standard Set
- **Power Source:** Battery Powered
- **Color:** Black
- **Item Weight:** 16 ounces
- **Alarm:** Audible
- **Operating Humidity:** 95 percent
- **Global Trade Identification Number:** 04029547021879
- **Number of Items:** 1
- **Manufacturer:** Testo

## Images

![testo 300 Combustion Analyzer HVAC Kit - Residential Combustion Leak Tester for Flue Gas, Draft, Differential Pressure, Ambient CO Levels of Heating Systems - Natural Gas Leak Tester with Spare Probe - Image 1](https://m.media-amazon.com/images/I/711suW1EWjL.jpg)

## Available Options

This product comes in different **Pattern Name, Size, Style** options.

## Frequently Bought Together

- testo 300 I Residential and Commercial Combustion Analyzer Kit with optional bluetooth printer I CO Meter for flue gas, draft, differential pressure and ambient CO levels of heating systems
- testo 510 Digital Manometer I Dual-Port Differential Pressure Meter for air Conditioning Systems and Ventilation ducts

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**Shop now:** [https://www.desertcart.nz/products/154778224-testo-300-combustion-analyzer-hvac-kit-residential-combustion-leak-tester](https://www.desertcart.nz/products/154778224-testo-300-combustion-analyzer-hvac-kit-residential-combustion-leak-tester)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-23*