--- product_id: 3668466 title: "6AZU2 Enclosed Fan Relay, SPNO, 24V" brand: "industrial grade" price: "AR$90554" currency: ARS in_stock: true reviews_count: 8 url: https://www.desertcart.com.ar/products/3668466-6azu2-enclosed-fan-relay-spno-24v store_origin: AR region: Argentina --- # 6AZU2 Enclosed Fan Relay, SPNO, 24V **Brand:** industrial grade **Price:** AR$90554 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 6AZU2 Enclosed Fan Relay, SPNO, 24V by industrial grade - **How much does it cost?** AR$90554 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/3668466-6azu2-enclosed-fan-relay-spno-24v) ## Best For - industrial grade enthusiasts ## Why This Product - Trusted industrial grade brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description 1 Review: Nest with Aprilaire Humidifier - This relay works perfectly for the Nest thermostat and Aprilaire Whole-House Humidifier with the simple 24VAC water solenoid/valve. Nest will not provide any information on connecting the two systems, and will only direct you to a $$$ professional HVAC company. The Aprilaire representative was sympathetic and directed me to search the internet for a relay, and online HVAC or DYI forums. I added the wiring diagram that works for my system, as a picture for this relay, and included a HVAC forum link in the comment section of this review. This information probably does not suit all systems, but it relates to 90% of the systems in the Midwest. Using the wiring diagram as shown with the "H" or humidifier power tap on my Carrier furnace only turns on only when the heat cycle is running. So when the Nest sees a demand for humidity, it closes the new relay, starts the fan, but there's no power to the water solenoid until the heat kicks in. Consequently, the fan may continually run without providing humidification. This alternative does not replace the Aprilaire Humidistat with outdoor temperature monitoring, and automatic turn down for temperatures below 30 degrees, like the Aprilaire RP-58 Automatic Digital Humidifier Controls. These automatic humidity controls are far superior to the Nest for control winter humidity. The Nest requires you to monitor the outside temperature, house humidity, understand what adjustments are needed, and then use the Nest app to change the humidifier setting. Thanks Aprilaire for making reliable systems and having great customer service. After researching this problem, I wish I would have bought a less expensive WIFI thermostat and the RP-58 humidistat. Review: Tried to use with humidifier and nest thermostat, didnt work long. - Edit: This is junk. I have problems just like others. It worked for a couple of weeks, but now I had to unhook my humidifier because it was stuck on. If you are buying this to use a whole house humidifier with a Nest thermostat, purchase a white-rodgers 90-290q relay instead. That's what I purchased to replace this one and it works great, and it is also 10 times quieter than this relay was. This one has a very loud click when engaging and disengaging. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004ZROX4S | | Best Sellers Rank | #683,613 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,927 in Electromechanical Relays | | Brand | Industrial Grade | | Coil Voltage | 24 Volts | | Connector Type | Screw | | Contact Current Rating | 6 Amps | | Contact Material | Tungsten | | Contact Type | Normally Open | | Current Rating | 6 Amps | | Date First Available | May 6, 2011 | | Is Discontinued By Manufacturer | No | | Item Weight | 2.24 ounces | | Item model number | 6AZU2 | | Manufacturer | Industrial Grade | | Mounting Type | Panel Mount | | Operation Mode | Automatic | | Package Dimensions | 3.1 x 1.8 x 1.5 inches | | UPC | 310094359640 | ## Product Details - **Connector Type:** Screw - **Contact Material:** Tungsten - **Contact Type:** Normally Open - **Current Rating:** 6 Amps - **Mounting Type:** Panel Mount ## Images ![6AZU2 Enclosed Fan Relay, SPNO, 24V - Image 1](https://m.media-amazon.com/images/I/41NqNGIM5yL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nest with Aprilaire Humidifier *by W***Y on November 8, 2013* This relay works perfectly for the Nest thermostat and Aprilaire Whole-House Humidifier with the simple 24VAC water solenoid/valve. Nest will not provide any information on connecting the two systems, and will only direct you to a $$$ professional HVAC company. The Aprilaire representative was sympathetic and directed me to search the internet for a relay, and online HVAC or DYI forums. I added the wiring diagram that works for my system, as a picture for this relay, and included a HVAC forum link in the comment section of this review. This information probably does not suit all systems, but it relates to 90% of the systems in the Midwest. Using the wiring diagram as shown with the "H" or humidifier power tap on my Carrier furnace only turns on only when the heat cycle is running. So when the Nest sees a demand for humidity, it closes the new relay, starts the fan, but there's no power to the water solenoid until the heat kicks in. Consequently, the fan may continually run without providing humidification. This alternative does not replace the Aprilaire Humidistat with outdoor temperature monitoring, and automatic turn down for temperatures below 30 degrees, like the Aprilaire RP-58 Automatic Digital Humidifier Controls. These automatic humidity controls are far superior to the Nest for control winter humidity. The Nest requires you to monitor the outside temperature, house humidity, understand what adjustments are needed, and then use the Nest app to change the humidifier setting. Thanks Aprilaire for making reliable systems and having great customer service. After researching this problem, I wish I would have bought a less expensive WIFI thermostat and the RP-58 humidistat. ### ⭐ Tried to use with humidifier and nest thermostat, didnt work long. *by C***N on November 19, 2018* Edit: This is junk. I have problems just like others. It worked for a couple of weeks, but now I had to unhook my humidifier because it was stuck on. If you are buying this to use a whole house humidifier with a Nest thermostat, purchase a white-rodgers 90-290q relay instead. That's what I purchased to replace this one and it works great, and it is also 10 times quieter than this relay was. This one has a very loud click when engaging and disengaging. ### ⭐⭐⭐⭐ Allows nest to connect to a two wire dehumidifier *by S***Y on May 17, 2019* Purchased for use with my nest thermostat and my dehumidifier. Works perfect for my application. ## Frequently Bought Together - Industrial Grade 6AZU2 Enclosed Fan Relay, SPNO, 24V - Electromagnetic Power Relay, 8-Pin 10 AMP 24V AC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY2NJ [Applicable for DIN Rail System] - TICONN Waterproof Electrical Junction Box IP67 ABS Plastic Enclosure with Hinged Cover with Mounting Plate, Wall Brackets, Cable Glands (Clear, 15.7"x11.8"x7.1") --- ## 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.com.ar/products/3668466-6azu2-enclosed-fan-relay-spno-24v](https://www.desertcart.com.ar/products/3668466-6azu2-enclosed-fan-relay-spno-24v) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-20*