Whole House Fan Timer Buying Guide: 8 Picks + Setup

Your whole house fan runs great, but you need a reliable timer to control when it switches on and off. Maybe your old timer died, or you want to upgrade from a basic switch to something with more control. Either way, you need to know which timer works with your specific fan, what features matter, and how to get it installed without calling an electrician.

This guide breaks down eight timer options that work with different whole house fan setups. You'll see what each timer does, which fans it works with, how much it costs, and what you need to know for installation. By the end, you'll know exactly which timer fits your needs and how to get it running.

1. WholeHouseFan.com matched timer and control kits

WholeHouseFan.com sells timer and control kits specifically designed to work with the fans they carry. These kits come pre-matched to your fan model, so you don't need to worry about compatibility issues or wrong amperage ratings. You get everything in one package, including the timer, mounting hardware, and clear wiring diagrams that match your exact fan setup.

How WholeHouseFan.com timer kits work with your system

These kits integrate directly into your whole house fan's electrical circuit. The timer acts as the on/off control between your home's power supply and the fan motor. When you order, the company matches the timer's amperage capacity to your fan's requirements, which prevents overheating and electrical issues that can happen when you buy a generic timer from a hardware store.

Key timer types you can choose from

You can pick from digital countdown timers, traditional dial timers, or smart wireless controls. Digital models let you set specific run times in one-hour increments, while dial timers use a mechanical spring mechanism. Wireless options give you remote control from anywhere in your home through a handheld transmitter or smartphone app.

Match the timer to your fan size and speed

Your fan's motor draws different amounts of power based on size and speed settings. A 24-inch fan might need a 5-amp timer, while a 36-inch two-speed model could require a 15-amp rated switch. WholeHouseFan.com's matching process ensures the timer can handle your fan's maximum load without tripping breakers.

The right timer rating prevents electrical failures and keeps your warranty valid.

Safety, amperage, and wiring basics

Most residential whole house fan timers handle 120-volt circuits with amperage ratings between 5 and 20 amps. You need to verify your fan's current draw matches the timer's capacity. The wiring typically includes a hot wire (black), neutral (white), and ground (green or bare copper). Never install a timer rated below your fan's amp requirements.

Installation and setup overview

Installation takes about 30 to 45 minutes if you're comfortable with basic electrical work. You'll turn off the breaker, remove the old switch, connect the wires to the new timer following the included diagram, and mount it in the wall box. Most kits include a faceplate that matches standard decor styles.

How long to run your whole house fan

Run your fan for two to four hours during cool evening hours for best results. This duration pulls enough outside air through your home to lower indoor temperatures without wasting energy. Some homeowners set timers for overnight operation when temperatures drop below indoor levels.

Common mistakes to avoid with timers

Don't install a timer rated for light switches on a fan motor, as the inductive load from the motor requires a different rating. Avoid using timers without a manual override option, which lets you turn the fan on or off regardless of the timer setting. Never splice wires together without proper wire nuts and electrical tape.

Who this option is best for

These matched kits work best if you bought your fan from WholeHouseFan.com or want guaranteed compatibility. You get technical support included, which helps if you run into installation questions. This option makes sense when you value peace of mind over finding the cheapest timer at a big box store.

Price range and how to order

Matched timer kits from WholeHouseFan.com typically cost $40 to $120 depending on features and amp ratings. You order directly through their website by selecting your fan model, and they recommend the right timer. Shipping is fast, and you can call their support line if you need help choosing between options.

2. Intermatic EI220W in wall countdown fan timer

The Intermatic EI220W gives you countdown control in four preset increments: 1, 2, 4, or 8 hours, plus a continuous hold mode. This SPST (single pole, single throw) timer mounts in a standard wall box and handles up to 15 amps at 120 VAC, making it strong enough for most residential whole house fans. You get silent electronic operation without the ticking noise that mechanical spring timers produce.

How this countdown timer works

You press one of four buttons to set your desired runtime, and the timer counts down automatically before shutting off the fan. The hold mode keeps your fan running indefinitely until you manually turn it off. Electronic circuitry controls the switching, so you won't hear any clicking or buzzing from the timer itself during operation.

Ideal setups and compatibility

This timer works with single-speed whole house fans that draw 15 amps or less on a 120-volt circuit. You can use it with most 24-inch and 30-inch fans, but check your fan's amp rating before buying. The EI220W won't work for two-speed fans unless you add a separate speed control switch, and it's not compatible with low-voltage control systems.

Check your fan's nameplate for amp draw before ordering any timer.

Installation and setup notes

Installation requires basic electrical skills and takes about 30 minutes. You'll need to match the timer's white, black, and ground wires to your existing circuit, following the included wiring diagram. The white faceplate fits standard decorator-style wall plates.

Price range and where to buy

The EI220W costs $35 to $50 depending on the retailer. You can find it at Amazon and specialty HVAC suppliers. Some whole house fan manufacturers sell this timer as an accessory option for their fan models.

3. Master Flow WHT36 12 hour wall timer

The Master Flow WHT36 gives you 12-hour countdown control designed specifically for 24-inch and 30-inch whole house fans. This timer mounts in a standard wall box and uses a simple dial interface that you turn to select your desired runtime. You get reliable mechanical operation without needing batteries or complex programming, making it one of the most straightforward whole house fan timer options available.

How this 12 hour timer works

You rotate the dial clockwise to set your desired runtime, up to 12 hours maximum. The timer uses a spring-wound mechanism that counts down gradually and shuts off your fan automatically when time expires. This mechanical design means you don't need to worry about power outages resetting your timer or electronic failures.

Ideal setups and compatibility

Master Flow designed this timer for their own 24-inch and 30-inch whole house fan models, but it works with other brands that have similar electrical specifications. Your fan needs to operate on a standard 120-volt circuit and draw within the timer's amp rating. This timer works best for single-speed fans in residential installations where you want simple countdown control without extra features.

Match your fan's amp draw to the timer's rating to prevent electrical problems.

Installation and setup notes

Installation takes about 20 to 30 minutes if you can handle basic electrical work. You'll connect the timer's wires to your fan circuit following standard single-pole switch wiring. The dial mechanism requires adequate depth in your wall box, so check clearance before ordering.

Price range and where to buy

The WHT36 costs $25 to $40 at home improvement retailers like Home Depot. You can also order directly from HVAC supply companies that carry Master Flow products.

4. QuietCool 12 hour digital fan timer switch

The QuietCool 12-hour digital timer gives you precise countdown control with an easy-to-read LED display. This whole house fan timer replaces your standard wall switch and offers push-button operation that lets you set run times in one-hour increments up to 12 hours. You get a clean white finish that matches modern home decor, and the digital interface eliminates guesswork about how much time remains.

How this digital timer works

You press the timer button repeatedly to cycle through your desired runtime, and the LED display shows the countdown in real time. The timer shuts off your fan automatically when it reaches zero, or you can press the manual override button to turn the fan on or off regardless of the timer setting. Digital circuitry provides silent operation without mechanical clicking sounds.

Ideal setups and compatibility

This timer works with QuietCool whole house fans and other brands that operate on standard 120-volt circuits. Your fan needs to draw within the timer's amp capacity, which typically handles most residential installations. The digital interface works best if you want to monitor remaining runtime from across the room.

Match your fan's electrical specifications to the timer's ratings before installation.

Installation and setup notes

Installation takes about 30 minutes and requires basic electrical knowledge. You'll connect the timer's wires to your existing fan circuit using the included wiring diagram. The timer fits standard wall boxes and comes with a mounting plate.

Price range and where to buy

QuietCool digital timers cost $50 to $75 depending on features. You can order from Amazon or through authorized QuietCool dealers. Some retailers bundle the timer with QuietCool fan purchases at a discount.

5. CentricAir two speed wall switch with timer

The CentricAir two speed wall switch combines speed control and timer functions in a single unit that replaces your standard wall switch. This control lets you select between high and low fan speeds while setting automatic shutoff times, eliminating the need for separate switches. You get temperature control features built into the timer that help optimize your fan operation based on indoor conditions.

How the two speed timer and switch works

You control both fan speed and runtime from one central interface mounted in your wall. The switch includes separate buttons or dials for speed selection and timer settings, letting you run your fan on low speed during mild weather or high speed when you need maximum cooling. The timer function works independently of the speed control, so you can set different runtimes for each speed setting.

When to choose a combined speed and timer control

Choose this combined control when you have a two speed whole house fan and want to simplify your wall switches. This setup makes sense if you frequently adjust fan speeds based on outside temperature changes throughout the evening. You avoid cluttering your wall with multiple switches, and you get coordinated control of both features from one location.

Combining speed and timer controls reduces installation complexity and wall space requirements.

Installation and setup notes

Installation requires connecting multiple wire sets for the speed control and timer circuits, which takes about 45 minutes. You'll need to follow the included wiring diagram carefully because the connections differ from standard single-speed timers. Make sure your wall box has adequate depth to accommodate the larger switch assembly.

Price range and where to buy

CentricAir two speed timer switches cost $80 to $130 depending on features and amp ratings. You can order directly from the CentricAir website or through authorized dealers who specialize in whole house ventilation systems.

6. Wi fi smart wall switch as fan timer

Wi-fi smart switches convert your whole house fan into a connected device that you control through your smartphone, voice assistant, or home automation system. These switches replace your existing wall switch and connect to your home Wi-Fi network, letting you set schedules, create timers, and turn your fan on or off from anywhere. You get advanced control options that traditional timers can't match, including integration with weather apps and temperature sensors.

How smart switches work as fan timers

You install the smart switch in your wall box like a standard switch, then connect it to your Wi-Fi network through a mobile app. Once connected, you create custom schedules that turn your fan on and off automatically at specified times. The app lets you set countdown timers that shut off your fan after a certain duration, similar to mechanical timers but with more precision and flexibility.

Pros and cons of going wi fi

Smart switches give you remote access and advanced scheduling that mechanical timers lack. You can adjust settings from bed or turn on your fan before arriving home. However, these switches require a stable Wi-Fi connection and power to function, so network outages disable remote control. Some models need a neutral wire in your wall box, which older homes might not have.

Compatibility and safety checks

Your smart switch needs to handle your fan's electrical load, typically rated between 10 and 15 amps for most whole house fans. Check if the switch requires a neutral wire before buying, as this determines installation feasibility. Not all smart switches work with motor loads, so verify the specifications mention fan or motor compatibility.

Always verify motor load compatibility before installing smart switches on fan circuits.

Installation, pairing, and setup tips

Turn off your breaker before starting the 30 to 45 minute installation process. Connect the switch wires following the manufacturer's diagram, mount it in the wall box, then restore power. Download the required app, create an account, and follow the pairing instructions to connect the switch to your network. Most apps include setup wizards that guide you through configuration.

Price range and where to buy

Wi-fi smart switches cost $25 to $60 depending on brand and features. You can find compatible models at Amazon from manufacturers like TP-Link, Lutron, and GE. Some require a separate hub for operation, which adds to the total cost.

7. Heavy duty spring wound in wall fan timer

Heavy duty spring wound timers use mechanical operation without any electronic components or power requirements. You wind a spring mechanism by turning a dial, and it slowly unwinds over time to shut off your fan automatically. These timers handle higher amperage loads than standard light switch timers, making them suitable for larger whole house fans that draw 15 to 20 amps.

How this mechanical timer works

You rotate the timer dial clockwise to your desired runtime, which winds an internal spring that drives the countdown mechanism. The spring releases gradually through a gear system that moves the dial back to zero, where it triggers the switch to cut power to your fan. This mechanical design eliminates failures from power surges or electronic component degradation.

Ideal setups and compatibility

This whole house fan timer works best for single-speed fans in homes where you want reliable operation without batteries or Wi-Fi. Your fan needs to match the timer's amperage rating, which typically ranges from 15 to 20 amps for heavy duty models. Choose this option if you have an older home with basic wiring.

Mechanical timers continue working during power outages and electrical surges.

Installation and setup notes

Installation takes about 25 minutes and follows standard single-pole switch wiring. You connect the timer's hot wires to your fan circuit and secure the ground connection.

Price range and where to buy

These timers cost $30 to $55 at hardware stores and Amazon.

8. Plug in timer kit for outlet powered fans

Plug in timer kits work with portable or outlet-powered whole house fans that don't require hardwired installation. You plug the timer into your wall outlet, then plug your fan into the timer's receptacle. These timers give you automatic shutoff control without any electrical wiring or wall switch modifications, making them the simplest timer option for fans that come with standard electrical plugs.

How a plug in timer kit works

The timer sits between your wall outlet and fan plug, controlling power flow through its internal switch mechanism. You set your desired runtime using either a mechanical dial or digital buttons, and the timer cuts power automatically when the countdown reaches zero. Most plug in timers handle loads up to 15 amps, which covers most portable whole house fans.

When a plug in timer makes sense

Choose a plug in timer if you have a window-mounted or portable fan that plugs into a standard outlet instead of being hardwired. This option works well for renters who can't modify wall switches or homeowners who want temporary timer control without electrical work. You can move the timer between different outlets and fans as needed.

Safety tips and limitations

Never exceed the timer's amp rating with your fan load, as this creates fire hazards. Avoid using plug in timers in damp locations unless they carry appropriate weather-resistant ratings. Check that the timer's plug and outlet connection stays tight, because loose connections generate heat that damages both components.

Always verify your fan's amp draw matches the timer's capacity before plugging it in.

Installation and setup notes

Installation takes less than one minute. You plug the timer into your outlet, set the desired runtime, then plug your fan into the timer. No tools or electrical knowledge required for this whole house fan timer option.

Price range and where to buy

Plug in timers cost $10 to $35 depending on features and amp ratings. You can find them at Amazon and most hardware stores.

How to use timers to save more on cooling

Set your timer to run during the coolest outdoor hours, typically between 8 PM and 6 AM. This maximizes temperature reduction while using minimal energy compared to running your fan during hot daytime hours.

Final thoughts

You now have eight solid options for controlling your whole house fan timer, from simple mechanical switches to advanced Wi-Fi controls. Each timer serves different needs based on your fan type, electrical setup, and desired features. Match your choice to your fan's amp rating first, then consider whether you want countdown control, speed adjustment, or smart features.

Installation ranges from plug-and-play solutions that take seconds to hardwired switches that need basic electrical skills. Most homeowners handle these installations without professional help, but call an electrician if you're unsure about your home's wiring. Remember to run your fan during cool evening hours for maximum energy savings.

Ready to upgrade your whole house fan with the right timer? Browse complete whole house fan systems with matched controls and lifetime support from experts who know ventilation inside and out.