---
product_id: 37844587
title: "US Merchant Heatilator Heatnglo Direct Vent Fireplace 27\" Thermocouple replaces Robertshaw 446-511"
brand: "fixitshop"
price: "฿1547"
currency: THB
in_stock: true
reviews_count: 10
category: "Fixitshop"
url: https://www.desertcart.co.th/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces
store_origin: TH
region: Thailand
---

# 27 kW heat output Fits Robertshaw & SIT 820 NOVA valves Safety shut off feature US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511

**Brand:** fixitshop
**Price:** ฿1547
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your fireplace’s heartbeat with precision and safety!

## Quick Answers

- **What is this?** US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511 by fixitshop
- **How much does it cost?** ฿1547 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces)

## Best For

- fixitshop enthusiasts

## Why This Product

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

## Key Features

- • **Safety-First Design:** Built-in safety shut off feature for peace of mind during every cozy evening.
- • **Universal Compatibility:** Seamlessly replaces Robertshaw 446-511 and fits SIT 820 NOVA gas valves with fine thread.
- • **DIY Friendly Installation:** Lightweight and easy to install, saving you costly maintenance fees.
- • **Reliable 27 kW Heat Output:** Power your direct vent fireplace with consistent warmth and efficiency.
- • **Durable Copper Construction:** Brushed metal finish ensures longevity and a sleek look in your living space.

## Overview

This 27" Thermocouple replacement part is designed for direct vent fireplaces, compatible with Robertshaw 446-511 and some SIT 820 NOVA gas valves. Crafted from durable copper with a brushed finish, it delivers reliable 27 kW heat output and includes a safety shut off feature. Lightweight and easy to install, it’s the perfect DIY upgrade to keep your fireplace running efficiently and safely.

## Description

Thermocouple for Direct Vent Fireplaces FITS Heatilator & Heat-n-Glo Replacement Thermocouple for Direct Vent Fireplaces Replaces ( replacement for) Robertshaw 446-511 Fits Robertshaw & some SIT 820 NOVA Gas Valves with fine thread. works on many fireplaces part numbers 34820 446-511 72956

Review: Works as described - I bought it so I didn’t have to pay a higher price from fireplace maintenance company. Works as described
Review: this part was a perfect fit. - this replacement part fits perfectly.

## Features

- Thermocouple for Direct Vent Fireplaces
- Replaces ( replacement for) Robertshaw 446-511
- Fits Robertshaw & some SIT 820 NOVA Gas Valves with fine thread.
- works on many fireplaces
- part numbers 34820 446-511 72956

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01C890C1W |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #238,926 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #145 in Fireplace Replacement Parts |
| Brand | Fixitshop |
| Burner type | gas |
| Color | Copper |
| Customer Reviews | 4.4 4.4 out of 5 stars (331) |
| Date First Available | February 26, 2016 |
| Finish | Brushed |
| Finish Type | Brushed |
| Heat Output | 27 Kilowatts |
| Installation Type | Wall Mount |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.44 ounces |
| Item model number | 446-511 |
| Manufacturer | Fixitshop Corp. |
| Material | Metal |
| Model Name | 27" Thermocouple |
| Package Dimensions | 5.35 x 3.98 x 0.51 inches |
| Part Number | 446-511 |
| Power Source | Gas Powered |
| Room Type | Living Room |
| Shape | Rectangular |
| Special Feature | Safety Shut Off |
| Special Features | Safety Shut Off |
| Specific Uses For Product | Indoor |
| Style | Classic |
| UPC | 045445923903 |
| Ventilation Type | Direct Vent |
| Warranty Type | Limited |

## Product Details

- **Brand:** Fixitshop
- **Color:** Copper
- **Finish Type:** Brushed
- **Heat Output:** 27 Kilowatts
- **Installation Type:** Wall Mount
- **Material:** Metal
- **Power Source:** Gas Powered
- **Room Type:** Living Room
- **Special Feature:** Safety Shut Off
- **Style:** Classic

## Images

![US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511 - Image 1](https://m.media-amazon.com/images/I/41Jo6Eg7ANL.jpg)

## Questions & Answers

**Q: Does this fit the heat n glo fireplace model sl-750tv-d?**
A: if your fireplace serial# is before 0021076242 ... then this will definitely fit. if your serial# is after ... then this will probably work just fine

**Q: Will this fit a vanguard model gvc50na?**
A: I have no idea, but my guess is - probably not.  Your best bet is to dig out your owner's manual or go to the Vanguard website - and look-up the part/part # thermocouple for your fireplace, and then cross-reference that to the Amazon website.  Good luck.

**Q: Will this fit empire dvvk-3-fv innsbrook direct vent lp gas fireplace insert?**
A: Without doing any research . . . I'm almost certain the answer is no.  I've found that the interchangeability of these thermocouples is almost non-existent.  Your best bet is to check your owner's manual for the part number (in the very back) and then cross-reference that part to Amazon or a similar after market supply source.

**Q: Is this a 87D thermocouple for a Cozi furnace?**
A: The answer to this question is best received from the manufacturer.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as described
*by C***O on December 14, 2025*

I bought it so I didn’t have to pay a higher price from fireplace maintenance company. Works as described

### ⭐⭐⭐⭐⭐ this part was a perfect fit.
*by D***D on July 30, 2025*

this replacement part fits perfectly.

### ⭐⭐⭐⭐⭐ Worked as it should. Perfect~
*by P***S on November 18, 2024*

Ordered and arrived very quickly. A prefect replacement for our Heat-N- Glo fire place. We hope this one lasts as long as our 12 year old original.

## Frequently Bought Together

- US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511
- Heat N Glo Thermocouple For Heat And Glo And Hearth & Home Fire Places
- Heat & Glo Thermopile Part # 2103-512 SAME DAY SHIPPING

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces](https://www.desertcart.co.th/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-25*