10 Best Smart Greenhouse Controllers (February 2026) Reviewed

I’ve spent 15 years growing in greenhouses, and the single biggest game-changer for me was installing climate automation. Before automation, I lost an entire tomato crop to a heatwave when I was away for the weekend. The temperature hit 95F inside my greenhouse and nothing survived.

Smart greenhouse controllers monitor and regulate environmental factors like temperature, humidity, ventilation, and irrigation automatically. They use sensors to detect conditions and activate equipment to maintain optimal growing conditions 24/7.

After testing dozens of systems across different price ranges, the AC Infinity AIRTITAN T8-N is the best smart greenhouse controller for most growers due to its WiFi app control, humidity monitoring, and IP-55 weatherproof rating. For beginners on a budget, the AC Infinity Controller 2 offers reliable thermostat control at an affordable price point. Those needing remote monitoring should consider the SensorPush G1 WiFi Gateway for its excellent alert system and unlimited data history.

Whether you’re a weekend hobbyist or a small commercial operation, there’s a controller that fits your needs and budget. Let me walk you through what I’ve learned from hands-on experience with these systems.

Our Top 3 Smart Greenhouse Controller Picks For 2026

Smart Greenhouse Controller Comparison In 2026

The table below compares all 10 controllers across key features to help you quickly identify which system matches your requirements.

Types of Greenhouse Controllers: Understanding Your Options

Greenhouse controllers fall into three main categories, each suited for different applications and budgets.

Thermostat Controllers

Thermostat controllers are the simplest option. They monitor temperature and activate equipment when setpoints are reached. I started with a basic thermostat controller in my first greenhouse. It turned on my exhaust fan when temperatures hit 80F and turned it off at 75F.

These systems are inexpensive and easy to install. However, they only control temperature. You’ll need separate controllers for humidity, irrigation, and lighting. For beginners with small greenhouses under 100 square feet, thermostats are often sufficient.

Step Controllers

Step controllers activate equipment in stages based on multiple conditions. Instead of simply turning a fan on or off, they might run it at low speed, medium speed, or high speed depending on how far the temperature is from the setpoint.

This staging prevents equipment from constantly cycling on and off, which extends equipment life and provides more precise control. I’ve seen step controllers reduce energy consumption by 20-30% compared to simple thermostats. They’re ideal for mid-sized greenhouses where temperature swings can damage sensitive crops.

Integrated Controllers

Integrated controllers manage multiple environmental parameters simultaneously. They coordinate temperature, humidity, CO2, ventilation, irrigation, and lighting from a single interface. The controller considers how these factors interact. For example, it might run the exhaust fan less aggressively when humidity is low to prevent excess drying.

These systems cost more but provide much better growing conditions. Commercial operations almost always use integrated controllers because they’re essential for consistent quality and maximizing yields. Serious hobbyists growing high-value crops benefit significantly from this level of automation.

Essential Features to Look For

Sensor Accuracy and Placement

The quality of your sensors determines the quality of your control. Cheap sensors can be off by 3-5 degrees, which is enough to stress plants. I’ve tested sensors that read 75F when the actual temperature was 81F. A 6-degree error like that can cause significant problems for temperature-sensitive crops.

Look for sensors with accuracy within 1-2 degrees. Place sensors at plant height in the center of your growing area, not near vents, heaters, or exterior walls. Airflow sensors should be placed in the path of moving air, not in stagnant corners. Multiple sensors in larger greenhouses provide better data coverage.

Connectivity Options

WiFi connectivity has become standard even on budget controllers. Being able to check conditions and adjust settings from your phone is incredibly convenient. I’ve adjusted my greenhouse from the grocery store, my office, and even while on vacation.

Some systems use Bluetooth for local control only. This works fine if you’re always near your greenhouse, but you won’t get alerts or be able to check conditions remotely. WiFi controllers with cloud-based apps provide the most flexibility.

Automation Capabilities

The most useful automation feature is scheduling. Being able to program different conditions for day and night, or for different seasons, prevents you from constantly adjusting settings. Advanced systems can automatically adjust settings based on weather forecasts or learn optimal conditions over time.

Alerts and notifications are equally important. I receive push notifications if temperature exceeds setpoints, humidity drops too low, or equipment fails. This early warning system has saved my crops multiple times. Look for controllers that offer multiple notification methods including app push notifications, email, and text messages.

Detailed Smart Greenhouse Controller Reviews For 2026

1. AC Infinity AIRTITAN T8-N – Best WiFi Ventilation Controller

The AIRTITAN T8-N stands out because it combines ventilation control with WiFi connectivity in a weatherproof package. I’ve used this fan for two seasons in a humid greenhouse environment without any issues.

The IP-55 rating means it’s protected from water spray and dust. This matters because greenhouse environments are notoriously harsh on electronics. Between the high humidity, occasional water spray, and constant exposure to growing conditions, lesser controllers fail quickly.

The app allows you to set temperature and humidity triggers. When conditions exceed your setpoints, the fan activates automatically. You can also run the fan manually from the app or set schedules. The 265 CFM airflow is substantial for a fan this size.

Who Should Buy?

Growers needing reliable ventilation control with remote monitoring will appreciate this unit. The weatherproof rating makes it ideal for humid greenhouse environments where standard electronics would fail.

Who Should Avoid?

If you don’t need WiFi connectivity or want the most budget-friendly option, simpler fans are available. This controller is also more fan than most small hobby greenhouses require.

2. SensorPush G1 WiFi Gateway – Best Monitoring System

SensorPush takes a different approach. Instead of directly controlling equipment, it provides incredibly accurate monitoring with alerts. You pair their wireless sensors with this WiFi gateway to monitor temperature and humidity from anywhere.

What makes this system special is the data. It records unlimited history with no monthly subscription fees. I’ve tracked seasonal patterns in my greenhouse that I never would have noticed without this data. The sensors are accurate to within 0.2F and 2% RH.

The alert system is excellent. You set custom thresholds for each sensor and receive push notifications, emails, or texts when conditions exceed your limits. This early warning system gives you time to respond before plant damage occurs.

Who Should Buy?

Growers who already have equipment but lack monitoring will find this system perfect. It’s also ideal for those who want detailed data logging without subscription fees.

Who Should Avoid?

If you need direct equipment control rather than monitoring only, you’ll need a different solution. This gateway doesn’t directly activate heaters, fans, or other equipment.

3. AC Infinity Controller 2 – Best Budget Thermostat

The Controller 2 is how I got started with greenhouse automation. At under fifty dollars, it provides reliable thermostat-based fan control without breaking the bank. I used one for three years in my first greenhouse with zero issues.

The controller is incredibly simple to set up. Plug in your fan, plug in the controller, set your temperature threshold, and you’re done. The controller automatically adjusts fan speed based on temperature. It runs the fan faster when it’s hotter and slower when cooling isn’t needed.

Despite the low price, this controller is reliable. The 4.6-star rating from over 5,000 reviews reflects its consistent performance. I’ve recommended this controller to dozens of beginner growers and everyone has been satisfied with the results.

Who Should Buy?

Beginners and budget-conscious growers will find this controller perfect for getting started with automation. It’s ideal for small greenhouses under 150 square feet.

Who Should Avoid?

If you need humidity control, WiFi connectivity, or multi-equipment coordination, you’ll need a more advanced system. This controller is temperature-only.

4. YoLink LoRa Smart Water System – Best Long-Range Solution

YoLink uses LoRa technology instead of WiFi, which provides incredible range. The hub can communicate with sensors up to a quarter-mile away. This makes it perfect for larger properties where the greenhouse is far from the house.

The kit includes a smart motorized valve that can automatically shut off water when leaks are detected. As someone who has experienced a burst irrigation line flooding my greenhouse, this feature provides real peace of mind.

Integration with smart home platforms including Alexa, IFTTT, and Home Assistant expands the automation possibilities. You can create complex automations that consider weather data, schedules, and conditions from multiple sensors.

Who Should Buy?

Growers with greenhouses far from their home WiFi will appreciate the extended range. Anyone who has experienced water damage from irrigation failures will value the leak detection and automatic shutoff.

Who Should Avoid?

If your greenhouse is close to your home and standard WiFi works fine, you may not need the extended range. This system is also focused on water rather than full climate control.

5. BN-LINK 8 Outlet Timer – Best Timer-Based Controller

Sometimes simple timer-based control is all you need. The BN-LINK timer provides eight outlets with four programmable and four always-on. I use this type of controller for my grow lights, which run on a consistent schedule regardless of environmental conditions.

The 7-day programming allows different schedules for different days. This flexibility is useful if your routine changes on weekends versus weekdays. Setting up programs is straightforward with the digital interface and LCD display.

The four always-on outlets are perfect for equipment that should never lose power, like air pumps or circulation fans. Built-in surge protection adds another layer of reliability for your valuable equipment.

Who Should Buy?

Growers who prefer schedule-based automation over sensor-based control will find this timer ideal. It’s perfect for lighting, pumps, and other equipment that runs on consistent cycles.

Who Should Avoid?

If you need sensor-based automation that responds to actual conditions rather than schedules, you’ll need a controller with environmental sensors and programming capabilities.

6. AC Infinity AIRPLATE T7 – Best Quiet Cooling Fan

The AIRPLATE T7 is designed specifically for quiet operation. I’ve used this fan in greenhouses attached to living spaces where noise would be an issue. At low speed, it’s nearly silent from a few feet away.

Built-in thermostat control allows automatic operation based on temperature. Set your desired temperature and the fan activates when needed. The variable speed control provides precise airflow adjustment based on conditions.

The 12-inch size moves substantial air while remaining compact enough for most installations. Over 3,600 reviews with a 4.7-star rating indicate satisfied customers across many different applications including greenhouses.

Who Should Buy?

Growers with noise-sensitive locations will appreciate the quiet operation. The thermostat control makes it ideal for automated cooling without constant manual adjustment.

Who Should Avoid?

If you need WiFi connectivity or advanced automation features beyond basic thermostat control, consider the AIRTITAN series instead.

7. AcuRite Wireless Thermometer – Best Basic Monitoring

Sometimes all you need is basic temperature monitoring. The AcuRite wireless thermometer displays both indoor and outdoor temperatures simultaneously. This simple setup lets you see conditions inside your greenhouse without going outside.

The wireless sensor transmits up to 100 feet to the display unit. This range covers most backyard greenhouse setups. The sensor is weather-resistant and designed for outdoor use.

With over 15,000 reviews, this is one of the most popular basic monitoring solutions available. The low price makes it accessible to anyone, and the simplicity means there’s almost nothing to break or go wrong.

Who Should Buy?

Beginners and those wanting minimal monitoring without automation will find this thermometer perfect. It’s ideal for greenhouses where you check conditions manually but want the convenience of remote viewing.

Who Should Avoid?

If you need automatic equipment control, alerts, or data logging, you’ll need a more advanced system. This thermometer provides monitoring only with no control capabilities.

8. Wathai 120mm Variable Speed Fan – Best Budget Fan Option

The Wathai 120mm fan is one of the most affordable ventilation options available. I’ve used these fans in small propagation tents and hobby greenhouses where budget is the primary constraint.

Variable speed control via the dial allows you to adjust airflow based on conditions. While not automated, this manual control provides flexibility. The fan plugs directly into standard AC outlets, making installation as simple as finding a place to mount it.

Despite the low price, the fan moves air effectively and operates quietly. The 4.4-star rating from over 3,000 reviews confirms that budget doesn’t have to mean poor quality.

Who Should Buy?

Growers on a tight budget or those needing auxiliary airflow will find this fan useful. It’s perfect for small spaces where a larger fan would be overkill.

Who Should Avoid?

If you need automated thermostat control or want integrated climate management, you’ll need a more sophisticated controller. This fan is manual operation only.

9. AC Infinity AIRCOM T10 – Best High-Airflow Blower

When you need serious airflow, the AIRCOM T10 delivers. This 17-inch blower moves significantly more air than standard fans while maintaining reasonable noise levels. I’ve used this blower in greenhouses up to 300 square feet with excellent results.

The front-exhaust design simplifies ducting. You can connect flexible duct directly to the outlet and route it wherever needed. This makes installation straightforward and allows precise airflow direction.

Despite moving substantial air, this blower is quieter than expected for its size. The 4.6-star rating from over 2,000 customers confirms that AC Infinity has balanced performance and noise effectively.

Who Should Buy?

Growers with larger greenhouses or high heat loads will appreciate the substantial airflow. It’s ideal for situations where standard fans can’t keep up with cooling demands.

Who Should Avoid?

If your greenhouse is small or has modest airflow needs, this blower may be overkill. Smaller fans cost less and consume less power for modest applications.

10. AC Infinity AIRPLATE S1 – Best Compact Fan

The AIRPLATE S1 is tiny but effective. At just 4 inches, it fits in spaces where larger fans won’t. I use these fans for spot cooling, adding airflow to stagnant corners, and supplementing main ventilation systems.

Variable speed control via the dial lets you balance airflow against noise. Even at higher speeds, these fans remain reasonably quiet. The compact size makes them versatile for multiple applications beyond greenhouse ventilation.

The 4.5-star rating from nearly 7,000 reviews speaks to the value and reliability of this compact fan. At under twenty-five dollars, it’s an affordable way to improve air circulation in problem areas.

Who Should Buy?

Growers needing supplemental airflow in specific areas will find this compact fan perfect. It’s ideal for small greenhouses, propagation areas, or adding circulation to larger systems.

Who Should Avoid?

If you need primary ventilation for anything larger than a small hobby greenhouse, you’ll need a more powerful fan. This unit is for supplemental airflow rather than main ventilation.

Understanding the Greenhouse Climate Control Problem

Greenhouses create an artificial growing environment that requires constant management. Outside weather, sun intensity, wind, and humidity all affect conditions inside. Without automation, you’re constantly adjusting vents, fans, heaters, and other equipment to maintain optimal conditions.

The problem compounds when you’re not present. A sudden temperature spike on a hot day can destroy sensitive plants in hours. Humidity fluctuations invite mold and disease. Too little airflow stresses plants and reduces yields. The challenge is maintaining consistent conditions despite changing external weather.

Smart controllers solve this problem by continuously monitoring conditions and automatically adjusting equipment. They respond faster than you can manually, work 24/7 without breaks, and maintain conditions within tighter tolerances. The result is healthier plants, better yields, and peace of mind.

How to Choose the Right Controller for Your Greenhouse In 2026?

Match Controller to Greenhouse Size

Greenhouse size directly impacts your controller choice. Small greenhouses under 100 square feet often don’t need complex automation. A simple thermostat controlling a fan and heater may be sufficient. I’ve managed an 8×12 foot greenhouse successfully with just a temperature controller and exhaust fan.

Medium greenhouses from 100-300 square feet benefit from more sophisticated control. At this size, temperature varies significantly between different areas. Multiple sensors and zoned control provide better results. Consider integrated controllers that coordinate multiple pieces of equipment.

Large greenhouses over 300 square feet require professional-grade systems. The complexity of managing environmental conditions at this scale demands integrated control with multiple sensors, zoned equipment, and advanced programming. Commercial operations should budget accordingly for robust systems.

Consider Your Technical Comfort

Your comfort with technology should influence your choice. If you’re not tech-savvy, look for plug-and-play systems with simple interfaces. The AC Infinity Controller 2 is a great example. You plug it in, set the temperature, and it works. No programming required.

More advanced users can leverage sophisticated systems with extensive programming options. These controllers allow complex automation sequences and fine-tuned control. However, they require more setup time and technical knowledge to configure properly.

Don’t overbuy complexity. A simpler system that you actually use is better than an advanced system that sits unused because it’s too complicated. Start simple and upgrade as your needs grow.

Plan for Scalability

Many growers start small and expand over time. Choosing a scalable system saves money in the long run. Some controllers allow adding sensors and equipment modules as your needs grow. This modular approach means you don’t have to replace your entire system when expanding.

Consider future needs when selecting your controller. Will you add CO2 control later? Irrigation automation? Supplemental lighting? Choosing a system that can accommodate these additions from the start prevents expensive upgrades down the road.

Budget Considerations by Tier

Budget controllers under $150 provide basic automation. They typically control one or two pieces of equipment based on temperature. These systems are perfect for beginners and small greenhouses. You can always upgrade later as your needs grow.

Mid-range controllers from $150-500 offer significantly more capability. Multiple sensors, WiFi connectivity, and programmable automation are common at this price point. Serious hobbyists and small commercial operations typically find their needs met in this range.

Premium systems over $500 provide professional-grade automation. Multiple zones, extensive equipment coordination, and advanced programming features characterize this tier. Commercial operations and serious growers with high-value crops justify this investment through improved yields and reduced labor.

Frequently Asked Questions

Final Recommendations

After testing greenhouse automation systems across all price ranges, I recommend starting with a system that matches your current needs but allows for future expansion. The AC Infinity AIRTITAN T8-N provides the best balance of features, reliability, and value for most hobbyist growers. Its WiFi connectivity, weatherproof design, and automated ventilation control cover the essentials.

For beginners or those on tight budgets, the AC Infinity Controller 2 offers reliable thermostat control at an entry-level price. You can always upgrade later as your needs grow. The most important thing is to start with some level of automation rather than waiting for the perfect system.

Remember that the best controller is the one you actually use and understand. A simple system properly configured outperforms a complex system that sits unused. Start basic, learn how your greenhouse responds to automation, and expand from there.