REMOTE CONTROL - These make using your preheater A LOT more convenient, saving you a trip to the hangar to plug in the system before each flight.
One type uses the cellular phone network. They are available from various sources, such as SwitcheOn .
Another type uses Internet WIFI rather than the cell phone network. Don't have WIFI in your hangar? Leave your iPad in your hangar setup as a hotspot. Or check with your internet provider and see if they have an internet receiver that you can place in your hangar. A friend has a Verizon receiver, for only $13/month. With internet in your hangar you can use a "smart switch" to remotely activate your preheat system.
Here is some advice from a local EAA'er friend of ours:
-----Original Message-----
From: Jeff Point
Sent: Sunday, April 2, 2017 2:48 PM
To: Bob Reiff
Subject: New switch for heaters
Bob,
Here is the new switch that I was describing last week.
http://www.belkin.com/us/F7C027-Belkin/p/P-F7C027/
The list price is $39.99 but you can get it for $29.99 at Best Buy or on Amazon. It works much like the cell phone switch that I bought from you several years ago and have been using ever since. This one does not use a cell sim card so that expense is eliminated. It does require wifi connection to the internet. I realize that most people do not have wifi in their hangars (me included.) However, many of us are now flying with iPads or other tablets than can function as a wifi hot spot.
I have an iPad mini that I use for Foreflight, and when not flying I leave it in the hangar plugged in to the charger. I simply turn on the wifi broadcast and leave it on- the Wemo switch connects using that signal (after a simple one-time configuration process.) You can manually turn it on/ off using a free simple app from Belkin, and you can also schedule it to run on certain times/ days. The data usage is minuscule, and if you are worried about your hangar neighbor stealing your wifi signal- keep in mind that it can be password protected and probably should be.
I've been using this setup all winter and it has worked flawlessly, and at far less cost than the cell phone switch and having to buy a new sim card each winter.
Jeff
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UPDATE 12/26/2018
We just had WIFI installed in the Reiff hangars and are now using this product instead of cellular remote controls…
DILISENS Smart Plug (2 Pack)
Each plug has 2 switches that can be activated independently of each other. So you could plug an engine heater into Switch 1, and battery charger into Switch 2. Or use 1 smart plug to control engine preheaters on 2 aircraft.
You control the switches from anywhere using a free app on your phone... just press a button on the screen. The app tells you the ON/OFF state of each switch.
The unit is rated 15 amps/1800 watts... the same capacity as a standard wall outlet.
It also does other neat stuff like record your power usage.
Best of all, we no longer need to keep track of the balance on our SIM card account as we did with the cellular switches. And we will avoid those annoying occasions when we want to turn the engine heater on, only to find the balance has gone to zero and we have to spend 15 minutes adding money to the account so the remote control will work.