---
product_id: 50897140
title: "Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU)"
brand: "rinnai"
price: "R38471"
currency: ZAR
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.za/products/50897140-rinnai-ex38ctn-space-heater-wall-furnace-direct-vent-natural-gas
store_origin: ZA
region: South Africa
---

# 38.4K BTU powerful heat output 7-stage modulating gas valve + timer Wall-mount compact design, easy install Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU)

**Brand:** rinnai
**Price:** R38471
**Availability:** ✅ In Stock

## Summary

> 🔥 Heat smarter, live warmer — your space’s new silent powerhouse!

## Quick Answers

- **What is this?** Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU) by rinnai
- **How much does it cost?** R38471 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/50897140-rinnai-ex38ctn-space-heater-wall-furnace-direct-vent-natural-gas)

## Best For

- rinnai enthusiasts

## Why This Product

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

## Key Features

- • **Silent Yet Powerful:** Quiet fan heater with negative coefficient thermistor detects temp changes within 0.5°F
- • **Energy-Smart Efficiency:** Seven-stage modulating gas valve optimizes fuel use and cuts costs
- • **Safe & Secure Operation:** Child lock and self-diagnostic auto shutdown for peace of mind
- • **Versatile & Space-Savvy:** Wall-mounted, direct vent design perfect for tiny homes, apartments, and condos
- • **Precision Climate Control:** Electronic thermostat with 60°F-80°F range for tailored comfort

## Overview

The Rinnai EX38CTN is a high-efficiency, natural gas wall furnace delivering 38,400 BTU of heat with precise electronic thermostat control. Designed for compact spaces like tiny homes and apartments, it features a seven-stage modulating gas valve, quiet fan operation, and advanced safety functions including child lock and self-diagnostics. Easy to install and energy-smart, it ensures consistent warmth with minimal noise and maximum comfort.

## Description

Rinnai's wall mounted furnace is the perfect heating solution that seeks out cold spots and begins to heat the room for maximum comfort within seconds. EX38CTN is a direct vent wall furnace with an efficient, quiet-operation heater fan; a negative coefficient thermistor that detects temperature change within half a degree; and a wall thermostat connectable. Rinnai's convectors feature fan heaters that push heat to the farthest reaches of the room, evenly warming larger spaces and maximizing cost saving. Rinnai America offers energy-efficient gas appliances that provide superior heating and hot water performance.

Review: Compact Design; Works Great - I did not want to rely on the electric heat pump on the ductless system that came with my tiny house since I live in an area where winter temps are below zero on a regular basis. I was familiar with Rinnai products since I had previously purchased a Rinnai gas water heater. This product was the perfect size and since the house is a total of 400 square feet, the specs claimed that it would heat the entire space. I installed it myself but the installation instructions that came with the product were not great. In searching the internet I found a YouTube video that clearly demonstrated how to install. I watched that a couple of times and without that video I would have been lost and would never have been able to self install. With the video the installation was very easy and straight forward. It took me less then one hour to install and get it running. My tiny house was delivered in January and the temps were in the teens and less every day. The first thing I did was to install the Rinnai wall heater. Once installed I turned it on and set it to 68 and left it for several hours. The outside temp was 10. When I came back a few hours later the interior temp throughout the entire tiny house was 68. It is now the end of February and it has been on and heating for over a month and it has been perfect. I am totally confused when I read reviews that complain about the noise. My unit is almost completely silent at all times and performs perfectly even when the outside temps dropped to 18 below zero. The heat is pretty much even throughout the house even in the bedroom which is in the back. My house has an upstairs loft and that is warm also which is not surprising since the heat naturally rises. This is the perfect heating unit for tiny houses like mine and so far (fingers crossed) I can not find anything about this product that I do not like.
Review: Great quality wall furnace. Easy to install. - I bought this furnace in Fall 2022 to replace an old wall furnace and it has performed very well throughout the cold winter, keeping the heat constant within about 2 degrees in my large bedroom. The bedroom is not heated by the main house furnace and is about 350 sq ft. It is very easy to install and use, no special wiring as it plugs into a standard wall outlet. I only needed to run some gas piping from my main line in the house to the heater. I like that it blows warm air at floor level keeping the whole room comfortable. The display is easy to see and use. I only set it to the heat I want locally on the unit and it does the rest. There are some other functions but I have not had a reason to use them. This furnace is designed and built very well as I expected from a Japanese manufacturer. I did not install a separate thermostat but that is an option. The only thing I do not like about it is the noise it makes each time the heat cycle starts. There is an igniter that clicks pretty loud followed by a short buzz when starting the heat cycle each time. I have come to ignore it and have no trouble sleeping, but my wife has complained several times about it. I'm hoping it lasts a long time for the price.

## Features

- Discontinued. Please see new model EX38DTN
- Smart Features: Energy efficient furnace includes an electronic spark ignition, a seven-stage modulating gas valve, timer settings, a variable speed inducer motor with pressure switch, and an electronic thermostat with a range of 60°F to 80°F
- Safe Settings: Electric heater features a child lock and self-diagnostic electronics that continually monitor functions, provide auto shutdown codes, and restart automatically when ignition or combustion fails
- Gas furnace: For homes, apartments, condominiums, and commercial settings; the heater is modular/mobile home approved

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0764K6931 |
| Assembly required | Yes |
| Batteries required | No |
| Best Sellers Rank | #847,699 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,464 in Heaters & Heater Accessories |
| Brand | Rinnai |
| Burner type | Radiant |
| Care instructions | Hand Wash |
| Color | Natural Gas |
| Customer Reviews | 4.6 4.6 out of 5 stars (148) |
| Department | All Ages, Unisex |
| Form Factor | Wall-Mounted |
| Fuel Type | Natural Gas |
| Global Trade Identification Number | 00766156009914 |
| Heating Coverage | around 3840 square feet |
| Included Components | Furnace |
| Indoor/Outdoor Usage | Indoor |
| Is Discontinued By Manufacturer | No |
| Item Weight | 88 pounds |
| Item model number | EX38CTN |
| Manufacturer | Rinnai |
| Max Temperature Setting | 80 Degrees Fahrenheit |
| Min Temperature Setting | 60 Degrees Fahrenheit |
| Mounting Type | Wall Mount |
| Number of Speeds | 7 |
| Number of pieces | 1 |
| Product Dimensions | 39.37"D x 16.54"W x 30.12"H |
| Recommended Uses For Product | Home |
| Room Type | Bedroom, Living Room |
| Special Feature | On Off Timer |
| Specifications | CSA, ICC-ES-PMG |
| UPC | 766156009914 |
| Voltage | 120 Volts |
| Warranty Description | 10 year manufacturer (Residential Heat Exchanger) |

## Product Details

- **Brand:** Rinnai
- **Color:** Natural Gas
- **Form Factor:** Wall-Mounted
- **Indoor/Outdoor Usage:** Indoor
- **Special Feature:** On Off Timer

## Images

![Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU) - Image 1](https://m.media-amazon.com/images/I/31+omRmRPXL.jpg)
![Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU) - Image 2](https://m.media-amazon.com/images/I/31eC3ZAZLqL.jpg)
![Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU) - Image 3](https://m.media-amazon.com/images/I/51YSYSD40YL.jpg)
![Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU) - Image 4](https://m.media-amazon.com/images/I/613TTDolMML.jpg)

## Questions & Answers

**Q: Does Rinnai make heaters that work without electricity, as when the power goes out?**
A: A person could easily purchase a deep cycle battery and use a small power inverter to use as a backup power supply for this heater. How long it would function or operate would depend on the size of the batteries and the draw of the electrical needs of the heater here. It woul dbe VERY EASY to make this backup power system with a plastic battery box and a few small tools. Hope This helps someone with similar questions, plans. All needed info woul dbe in the heaters specs sheet, APERTURE draw is what you are looking for to find the best power inverter to us...

**Q: Do you have to have electricity to operate ?**
A: You do need electricity, we really like ours, only potential problem is finding someone to service it, had older model and it lasted 17 years and never needed service.

**Q: Which extension kit works with this model?**
A: Through the wall directly behind unit!

**Q: how big of a room can these heaters heat?  High ceilings or regular?**
A: We have 2 Rannais to heat a 1125 Sq ft loft with 12 ft ceilings  . All walls are Brick with no insulation and the floors and ceiling are un- insulated concrete . These heaters are fantastic and we now have over 8 units in various buildings . If the loft was insulated we could get away with just one unit

## Customer Reviews

### ⭐⭐⭐⭐⭐ Compact Design; Works Great
*by D***G on February 27, 2021*

I did not want to rely on the electric heat pump on the ductless system that came with my tiny house since I live in an area where winter temps are below zero on a regular basis. I was familiar with Rinnai products since I had previously purchased a Rinnai gas water heater. This product was the perfect size and since the house is a total of 400 square feet, the specs claimed that it would heat the entire space. I installed it myself but the installation instructions that came with the product were not great. In searching the internet I found a YouTube video that clearly demonstrated how to install. I watched that a couple of times and without that video I would have been lost and would never have been able to self install. With the video the installation was very easy and straight forward. It took me less then one hour to install and get it running. My tiny house was delivered in January and the temps were in the teens and less every day. The first thing I did was to install the Rinnai wall heater. Once installed I turned it on and set it to 68 and left it for several hours. The outside temp was 10. When I came back a few hours later the interior temp throughout the entire tiny house was 68. It is now the end of February and it has been on and heating for over a month and it has been perfect. I am totally confused when I read reviews that complain about the noise. My unit is almost completely silent at all times and performs perfectly even when the outside temps dropped to 18 below zero. The heat is pretty much even throughout the house even in the bedroom which is in the back. My house has an upstairs loft and that is warm also which is not surprising since the heat naturally rises. This is the perfect heating unit for tiny houses like mine and so far (fingers crossed) I can not find anything about this product that I do not like.

### ⭐⭐⭐⭐⭐ Great quality wall furnace. Easy to install.
*by P***R on April 25, 2023*

I bought this furnace in Fall 2022 to replace an old wall furnace and it has performed very well throughout the cold winter, keeping the heat constant within about 2 degrees in my large bedroom. The bedroom is not heated by the main house furnace and is about 350 sq ft. It is very easy to install and use, no special wiring as it plugs into a standard wall outlet. I only needed to run some gas piping from my main line in the house to the heater. I like that it blows warm air at floor level keeping the whole room comfortable. The display is easy to see and use. I only set it to the heat I want locally on the unit and it does the rest. There are some other functions but I have not had a reason to use them. This furnace is designed and built very well as I expected from a Japanese manufacturer. I did not install a separate thermostat but that is an option. The only thing I do not like about it is the noise it makes each time the heat cycle starts. There is an igniter that clicks pretty loud followed by a short buzz when starting the heat cycle each time. I have come to ignore it and have no trouble sleeping, but my wife has complained several times about it. I'm hoping it lasts a long time for the price.

### ⭐⭐⭐⭐⭐ Top-notch Japanese engineering!
*by G***A on January 1, 2025*

Fantastic Japanese engineering design and build quality. Pretty easy to install, quiet during operation, and the multi-stage / variable gas valve + burner throttles in 6 or 7 steps between 5,500 and 11,000 BTU, which helps the unit to "home in" on the correct level of steady-state heat output to keep the space at a constant temperature. Also, the online vendor I bought from, efaucets, did a fine job with packing & shipping. The (6) individual units all arrived on a single pallet via truckfreight. I've installed 3 so far and all are working perfectly.

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- Rinnai EX38CTN Space Heater Wall Furnace, Direct Vent, Natural Gas (38.4K BTU)
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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-07*