Mars Hydro iFresh 4" Inline Smart Fan. Featuring a powerful EC motor with smart control and whisper quiet operation, the. Mars Hydro iFresh is the ultimate choice in grow tent ventilation. Mars Hydro iFresh 4" Extraction Fan Smart Controlled Ventilation Includes iConnect USB Whisper Quiet Operation Suitable For Up To 1.0m x 1.0m Mars Pro Add On Included Perfect Cooling For LED Grow Lights Hard Working Ventilation Incredible Value A Breath of iFresh Air. The iFresh 4” isn’t just another inline fan. Oh no, this is a precision-engineered, tech-infused masterpiece. This thing doesn’t just move air - it moves it intelligently. With 205CFM of airflow and whisper-quiet operation at just 26.8dBA, it’s the kind of high-performance system that makes other fans look like asthmatic hamsters running on a wheel. And here’s the kicker - you can control it all from your phone. That’s right, thanks to Mars Hydro’s iConnect system, you can tweak, tune, and automate your entire grow room’s ventilation setup with a few taps on an app. Forget fumbling around with clunky dials - this is ventilation, smart-style. Whisper Quiet. Exceptionally Powerful. Inline fans tend to come in two flavours: the kind that sounds like a jet engine taking off in your grow tent, or the kind that moves less air than a pensioner blowing out birthday candles. The iFresh 4” is neither. With its PWM-controlled EC motor and mixed-flow design, this fan delivers a massive 205 CFM of airflow while producing just 26.8dBA of noise. That’s about as loud as a librarian gently shushing someone. So if you’ve ever tried to run an extraction fan while having a conversation in the same room and found yourself shouting like a pub landlord at closing time, the iFresh 4” is here to restore peace and sanity. Genius-Level Smart Features. Yes, it moves air – but this isn’t some medieval wind tunnel. The Mars Hydro iFresh Inline Fan is 2025’s answer to smart growing, fully integrated with the MarsPro App via the included iConnect USB and MarsPro Add-On Pack. Once hooked up, this thing transforms from "great fan" to "fully automated climate technician" with three intelligent modes: 1. Auto Mode You set the environmental thresholds, and the fan does the thinking. Temperature creeps above 27°C? Humidity too clingy at 75%? No problem. The fan ramps up automatically, kicks your climate back into shape, then rests – all without you lifting a finger. With dead zone calibration (2–3°C for temp, 5–10% RH for humidity), the system avoids constant cycling that can burn out hardware and spike your energy bill. This isn’t just smart—it’s strategic. 2. Cycle Mode Need rhythmic ventilation to maintain balance in your closed-loop setup? Set your start time, run duration, and shutdown interval, and the fan handles it all. Up to 99 on/off cycles per day – you’ve got granular control like never before. 3. Timer Mode Perfect for dialed-in, phase-based growth. Set up to five operational stages per day, each customizable down to the minute. Not a second wasted. Not a leaf left gasping. The Future Of Cultivation. There are fans, and then there are tools. This is the latter. The Mars Hydro iFresh Inline Fan, especially the compact 4-inch model, brings intelligent airflow to setups that used to settle for “just good enough.” Grow smarter. Breathe easier. And for heaven’s sake, stop fighting your environment. Let the iFresh fan do it for you. Welcome to the future of cultivation. Mars Hydro iFresh 4” Extraction System Specs: Airflow: 205 CFM Noise Level: 26.8 dBA (Quiet as a whisper) Control: Smart App via iConnect or Manual Dimmer Motor: PWM-Controlled EC Motor Carbon Filter: High-Efficiency Activated Charcoal Trustpilot
