--- product_id: 37844587 title: "US Merchant Heatilator Heatnglo Direct Vent Fireplace 27\" Thermocouple replaces Robertshaw 446-511" brand: "fixitshop" price: "22828CFA" currency: XOF in_stock: true reviews_count: 10 category: "Fixitshop" url: https://www.desertcart.sn/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces store_origin: SN region: Senegal --- # 27 KW heat output Direct fit for Robertshaw 446-511 & SIT 820 NOVA valves Built-in safety shut off US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511 **Brand:** fixitshop **Price:** 22828CFA **Availability:** ✅ In Stock ## Summary > 🔥 Upgrade your fireplace’s heartbeat with precision and power! ## 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?** 22828CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/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:** Equipped with a reliable safety shut off mechanism to protect your home and peace of mind. - • **Compact & Lightweight:** At just 1.58 ounces and 27 inches in size, it’s easy to handle and install even in tight fireplace spaces. - • **Durable Copper Finish:** Crafted from high-quality metal with a brushed copper finish for lasting durability and a sleek look. - • **Precision Compatibility:** Seamlessly replaces Robertshaw 446-511 & fits SIT 820 NOVA valves with fine thread for hassle-free installation. - • **Robust Heat Performance:** Delivers a powerful 27 KW heat output, ensuring your direct vent fireplace stays cozy and efficient. ## Overview This Fixitshop thermocouple is a direct replacement for Robertshaw 446-511 and compatible SIT 820 NOVA gas valves, designed for direct vent fireplaces. It delivers 27 KW of heat output, features a safety shut off, and boasts a durable brushed copper finish. Lightweight and compact, it ensures a perfect fit and reliable performance, extending the life of your fireplace with professional-grade quality. ## 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: Perfect fit for Harman Shadow Light XL LP Gas Fireplace - This thermocouple was a perfect fit for my Harman LP gas fireplace. The threads matched correctly at the thermocouple and gas valve ends. I gave 3 stars for installation because it's a finnicky job that takes a some patience, there isn't a fitment problem. Besides installing the thermocouple you have do disassemble quite a bit of the fireplace to make the replacement and there's tight quarters at the gas valve end. The fireplace is 18 years old, the first thermocouple lasted 14 years, the second one lasted 4. I hope this one is equal to the original! ## 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 | |---------------|-------| | Additional Features | Safety Shut Off | | Brand | Fixitshop | | Chamber Depth | 27 inches | | Color | Copper | | Finish Type | Brushed | | Heat Output | 27 KW | | Installation Type | Wall Mount | | Item Weight | 1.58 ounces | | Material | Metal | | Power Source | Gas Powered | | Shape | Rectangular | | Size | 27" | | Style Name | Classic | | 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 ### ⭐⭐⭐⭐⭐ Perfect fit for Harman Shadow Light XL LP Gas Fireplace *by J***M on February 16, 2024* This thermocouple was a perfect fit for my Harman LP gas fireplace. The threads matched correctly at the thermocouple and gas valve ends. I gave 3 stars for installation because it's a finnicky job that takes a some patience, there isn't a fitment problem. Besides installing the thermocouple you have do disassemble quite a bit of the fireplace to make the replacement and there's tight quarters at the gas valve end. The fireplace is 18 years old, the first thermocouple lasted 14 years, the second one lasted 4. I hope this one is equal to the original! ### ⭐⭐⭐⭐⭐ Good Product *by S***E on June 14, 2026* Durable product that is easy to install. ## 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.sn/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces](https://www.desertcart.sn/products/37844587-us-merchant-heatilator-heatnglo-direct-vent-fireplace-27-thermocouple-replaces) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-09-16*