REMOTE CONTROL - These make using your preheater a lot more convenient, saving you mulitple trips to the hangar to plug in the system before each flight.
One type uses the cellular phone network. Available from various sources but we suggest you look at these, they are made in the USA, not China ... FST
Another type uses WIFI rather than the cell phone network. Don't have WIFI in your hangar? Leave your iPad in your hangar setup as a hotspot.
Here is some advice from a local EAA'er friend of ours:
From: Jeff Point
Sent: Sunday, April 2, 2017 2:48 PM
To: Bob Reiff
Subject: New switch for heaters
Here is the new switch that I was describing last week.
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.