"Long Engine Life Starts With Reiff"

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Reiff vs. The Other Brand

One of the most frequently asked questions we get is "What's the difference between your system and (the other brand)?". 


Comparison of Design

Comparison of Prices

Comparison of Warranties

Comparison of Performance

Aviation Consumer Reviews


Comparison of Design


Comparison of Prices *



Other Brand


Lycoming & Continental

4 cylinder engines


300 watts


240 watts

Lycoming & Continental

6 cylinder engines


400 watts


460 watts

High wattage systems

Add $200 to above

Doubles the wattage

Not offered*

Cylinder element (50 watts)


$65 - $170

Oil sump element


Durable aluminum HotStrip

$115 - $610

Less durable silicone pads

* Source of competitor data is their web site as of 3/18/2017. Note their web site does not show any high wattage systems comparable to our Turbo and Turbo XP Systems.


A big advantage of our system is that it is non-invasive.  All our parts are installed "on" the engine.  Nothing is installed inside the engine, and you do not need to remove any Lycoming or Continental OEM parts or replace any OEM parts with our parts.  For example, our primary competitor's system replaces the OEM intake manifold bolts with their own heated bolts.  These are simply hollowed out bolts with heating elements epoxied into the hollowed out core.  As a general design philosophy we feel it is safer not to replace parts that were installed by the engine manufacturer, especially critical structural parts like bolts.

Comparison of Warranties


The best preheat system deserves the best warranty.  

Our 5 year, No-Fault, No BS warranty beats the other guys' 3 year "loaded with fine print" warranty.  


Our Warranty

"Buy It & Try It" No-Risk Trial Period.  Install it, try it, and if you are unsatisfied for any reason, send it back within 30 days of purchase.

Up to 5 years after purchase we will replace or repair any part that fails for any reason.


Applies to preheat systems purchased after 7/1/2010, other products are warranted by their manufacturer.  Proof of purchase date required


Compare ours with the other brand's warranty:


Edited only to remove the company's name, and to add our comments [in red like this]

Other Brand's Warranty Policy
This component (model and serial number indicated below) is conditionally guaranteed to be free from defect in material and workmanship for three years from date of purchase [and it was originally only ONE year until we entered the market with our better warranty].  If any defect in materials or workmanship causes or contributes to this component not functioning properly, [we] will honor the warranty in the following manner:
  • Contact [us] and provide information regarding the componentís failure to perform.
  •  Provide the part number and serial number of the product.
[We] will replace the defective part or parts, but will not be responsible for removal or reinstallation of said part or parts. 
Conditions of the warranty:
  • Part must be properly installed and signed off by a licensed A&P or equivalent.[in other words, no warranty coverage applies for homebuilders and other do-it-yourselfers]
  • It cannot have been altered, converted, modified, repaired, neglected or used in any way not recommended by [us] [in other words, if there is any way they can blame you for the failure, they can deny warranty coverage]
  • Damage to component caused by improper installation or removal from aircraft is expressly not covered by this warranty. [in other words, if there is any way they can blame you for the failure, they can deny warranty coverage]
  • Warranty card must have been properly completed and signed by purchaser and installing mechanic within 60 days of the date of purchase. [in other words, better get the system installed quickly, and don't forget to send the registration card in]



Which warranty is the most customer friendly?

We don't like the idea of arguing with customers about whether it was their fault the product failed.  So we don't. 

Who do you think has the most confidence in their product?

Another reason we give such a broad warranty is because we know from experience we won't have to replace very many parts. Consequently, our broad warranty makes more economic sense because the cost of replacing those few parts is a lot less than the cost of us having to administer a more complicated, restrictive warranty policy like our competitor's.  Besides, we don't have the room or the time to file a couple thousand warranty registration cards every year!  

Which do you think is the best choice for homebuilders and other do-it-yourselfers?

We are homebuilders ourselves ( RV-4 ).  We figure if you can build an airplane we can trust you to install our preheat system and we are not going to require you to pay an A&P to do it.


Comparison of Performance


Test Method

The tests were conducted on our Cherokee 235 with a Lycoming 0-540 engine, which is equipped with both our competitor's system and ours.  In each test the aircraft was in our unheated hanger, the air inlets were plugged with foam rubber cowl plugs, the cowling was covered with a blanket which laid over the top and hung about halfway down the sides , and the sump had 9 qts of oil. The temperatures were obtained by a calibrated digital thermometer with a remote probe inserted between the top two fins on the center left cylinder, and a second probe dropped down the oil filler tube with the tip suspended at the 4.5 qt level.  The other brand's system includes a 50 w probe on 5 of 6 cylinder heads (a CHT is on the other) and two 50 w elements on the oil sump.  For the test of the competitor's system we measured one of the heated cylinders - not the unheated one.  Ambient temperature was about 20o F.


Test Results

oF Rise Above Ambient Temperature after 12 hours




Reiff Turbo XP System



Reiff Turbo System



Reiff Standard System



Competitor's standard system



 Reiff HotBand cylinder heaters alone



Reiff HotStrip oil heater alone





A comment about the other brand's test results:

Our competitor has a graph which shows their system outperforming ours, however, their testing method gives a skewed result.  They measured the temperature with a spark plug thermocouple only about one inch from their heating element in the CHT port, several inches away from our heating element.  When we did our comparison tests we wanted them to be fair, credible, and able to withstand independent scrutiny, so we measured at the top end of the cylinder, about midway between our heating element and theirs.

Also note that their test was done without a cover, despite the fact their instructions are to "Always use an insulated cover". A cover holds the heat inside the cowling and helps make the temperatures in the engine compartment uniform regardless of the placement of the heat sources. Leaving the cover off makes the heating less uniform and the heat is more concentrated near the heat sources, so measuring the temp near their element and far from ours further skews the test result in their favor.

Finally, note that the only temperature they compare in their test is the cylinder head. They do not measure the oil.

Heating performance is a function of wattage.  Period.  Our watts are not better than anyone else's, nor are theirs better than ours.

We recognize that any product test performed by the product's producer (including ours) will be viewed with skepticism by the marketplace. From the perspective of the consumer, the most meaningful test is one performed by an unbiased third party such as Aviation Consumer. That's why we are providing the results of their tests here.

Who is the "pioneer" who invented engine preheating?

If you believe what some say, it was they who did so in the 1970's... "We were the first to develop aircraft engine preheat systems".

Nonsense.  Engine heaters for aircraft as well as auto, truck, train, and other engines have been around long before the 1970's.

The US, British, German, and Japanese air forces of World War II preheated their aircraft engines to improve cold starting and combat readiness of their aircraft.  For example, read about the Japanese Supersub, an aircraft carrier submarine:

"The supersub combined the stealth and tactical advantages of sea and sky and was invented to execute air strikes on land from the sea...The subís specialty bombers had wings that could rotate and fold up, a tailfin that could fold down, and a method of preheating the engine oil underwater so that the planes didnít have to warm up on the surface, where they were most vulnerable to attack."  http://www.pbs.org/wnet/secrets/features/japanese-supersub-preview-this-episode/546/ 

The Japanese preheat system was based on one used by the German Luftwaffe.


Who is "the leading manufacturer of aircraft engine preheaters for general aviation aircraft"?

The other brand makes this claim prominently on their web site. But both they and we are privately owned companies and don't publish our sales data. Since our competitor does not know what our sales are, how do they know theirs is higher than ours, and therefore how can they claim to be "the leading manufacturer"? Likewise, we do not know their sales, so we cannot and do not claim to be "the leader".

The only objective comparison we can make is web site traffic

As of 3/18/2017, per the Traffic History 90 Day Average, we had 63% more daily visitors. We had 88 daily visitors, and the other brand had 54. .


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Last updated 3/18/2017