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More installations and more satisfied customers for more than three decades.

Tanis offers complete Aircraft and Engine Preheat Systems for your Piston, Turbine or Rotorwing Aircraft

Tanis preheat systems offer a variety of advantages to aircraft operators in a multitude of uses. From cold weather operations to quicker starts, from extending engine life to saving on fuel costs, a Tanis system works. And only a Tanis preheat system offers customers the advantage of being the innovator and technological leader for more than 37 years.

Tanis stands for the most technologically advanced systems for aircraft preheat. A Tanis system is the only solution to provide heat to all critical engine components. Call Tanis toll-free at 1-800-443-2136 to specify a system for your aircraft.

The following are customer testimonials about their experiences with a Tanis preheat system.

LifeFlight of Maine - Tanis Preheat SystemsThe Tanis preheat systems have been a great addition to our Agusta aircraft. We work in an extremely cold climate. The heaters are installed on the main rotor gearbox, tail rotor gearbox, both engines, hydraulic oil tanks and battery. We've configured the heaters to the aircraft with a separate shore line system.

The Tanis systems increase our operational readiness and shorten launch times as the pilots can have all the systems up to temperature quickly. This significantly reduces electrical loads on cold engine starts and protects moving components. With over six years of operation, they have been extremely reliable and maintenance free. Operation is simple—we plug them in shortly after the last flight while the oils are still warm and aircraft are ready to go. While difficult to completely calculate ROI, our previous aircraft did not have the Tanis preheat systems and we certainly see a difference in operations.

Thomas P. Judge, CCTP
Executive Director
LifeFlight of Maine


Continental IO-360 Tanis Preheat SystemMr. Claude McKibben is the owner of a 1977 Hawk XP R172K based in Rochelle, Illinois. He uses his airplane approximately 75 hours per year split about evenly between business/personal. The engine in this airplane is a Continental IO-360-K. The following significant events appear in engine and airframe logbooks:

- Tanis TAS-100 preheat system installed in December 1980 at 777 engine hours.

- Schneck Aviation in San Antonio performed a major overhaul in 1984 at 1,541 engine hours, and reinstalled the original Tanis preheat system on the rebuilt engine.

- Mr. McKibben became the owner of the Hawk XP in July 1989 with 2,030 airframe hours.

- In August 2011, he delivered the aircraft to the Continental Motors factory service center in Fairhope, Alabama, for installation of a new IO-360-KB. The original engine was at 1,890 hours SMOH by Schneck.

- During installation, a decision was made to install a new Tanis preheat system.

- On removal of the previous IO-360 engine, compression readings revealed one cylinder in the high 70s; four cylinders in the mid to low 70s and one cylinder in the low 60s. The engine was reported to use about one quart of oil every 10 to 12 hours with fuel burn at 9.3 GPH.

- After 31 years and 2,654 flight hours, the first Tanis preheat system was removed from the original engine and returned to the Tanis for inspection and evaluation.

Mr. McKibben made the following statements regarding his operation of the Tanis preheat system:

- Over its installed lifetime, the TAS-100 preheat system only required replacement of one cylinder heat element. “I could always depend on it to bring the engine to reasonable starting temperature, even when tied out.”

- The airplane was kept in an unheated hanger. Preheat was used at temperatures below 50 degrees F. A standard settable clock timer was used to turn on the preheater prior to departure. One to two hours of preheat was used at 50 degrees F.

- For colder ambient temperatures the length of preheat time was then increased proportionately down to zero degrees, or lower (occasionally as low as minus 20 degrees F), at which time a full three to four hours of preheat was used along with an insulating blanket.

- Although the User Guide recommends six hours of preheat before engine start, Mr. McKibben rarely needed that long in the hangar with the cowl plugs in place.

- Physical touch was used to ascertain adequate warmth of the engine prior to start. Oil was changed every 25 to 30 hours of operation.

Reasons expressed by Mr. McKibben for specifying Tanis preheat:

1. Good for the engine.

2. Ease of starting.

3. Minimize departure time on the ground.

4. Efficacy of Tanis design in delivering low levels of heat to all critical engine components and fluids.

Upon inspection of the 31-year-old preheater wiring harness, threaded heat elements and pad heat elements, the results were as follows:

- There was no abnormal wear noted on any of the cabling. Voltage and resistance checks were made on all of the cabling and found to be nominal and in accordance with new specifications.

- There were five TAS-100 threaded heat elements installed on this engine. The cylinder used for the factory CHT probe did not have a heating element installed. Of the five threaded heat elements, four were found to be nominally functional and in accordance with original factory specifications regarding resistance and ability to produce rated heat output. A single threaded heating element was found to be not functioning.

- Two heat pad elements were part of the system, one affixed the lower underside of the engine case and one affixed to the topside case. Both of these pad elements were found to be functional.

CONCLUSION: Even though only four of the six cylinders had heat applied to them for reasons mentioned above, Tanis feels that the operational technique used by Mr. McKibben as described above resulted in a long-term satisfactory outcome in the use of the Tanis preheat system. Using a blanket to contain heat in an unheated hangar, physically checking the engine for warmth prior to departure, regular interval oil changes and being diligent about preheating were (and are) responsible for achieving the inherent benefit of the Tanis preheat system.

Tanis Aircraft Products - AirVenture Oshkosh 2011
Click on the image above to watch the Michael Wiskus Airshows testimonial video.

Beech Sierra - Tanis PreheatGentlemen:

I own a Beech Sierra and commute from my home near Red Wing, MN (RGK) to Alexandria, MN (AXN) year-round, so I fly in a lot of cold weather.

In the past I have had a lot for expensive attitude indicator failures (three in eight years). Four winters ago I installed a set of your floor mat heaters in the Sierra and have had excellent success with the heaters.

I have found that the heaters work best when I drape a blanket over the control columns and the glare screen so the heat is trapped under the blanket and concentrated around the instruments. I also pass the power cord through the small pilot's window and plug the hole with a grout sponge so that the power cord does not get pinched by the door.

Thanks for the great product.

Dan Johnson, Maiden Rock, Wisconsin

Weight-shirt Trike  - Tanis PreheatI operate a North Wing Sport XTC weight-shift-control trike in Hilo, Hawaii. The Tanis preheat system allows me to remove harmful condensation from my engine and delivers smooth and reliable engine performance.

George Tamlin, Keaau, Hawaii

Mr. Krueger,

I would like to share my experience with engine preheating and why it is such an important requirement for all pilots and aircraft owners to consider.

I had previously owned an aircraft without an permanent engine heater. Living in a cold weather climate (Minnesota) I was using a portable kerosene heating system with an air duct that directed warm air upward into the engine compartment. I would pre-heat for several hours with this portable system prior to starting the engine. I had used this heating procedure for two years (and SMOH) and thought I was fully warming my engine properly prior to engine start. On a cold February morning, and just minutes after take-off, I experienced an unnerving engine vibration at 3000' AGL that required an immediate shut down and a concurrent 180-degree turn back to the airport.

Flying Advenutres MagazineI was fortunate to have a strong tailwind that assisted me in reaching the airport with a non-event landing. My mechanic said the engine failure problem was caused by lack of lubricating oil due to improper preheating. This engine had just 380 hours since overhaul. During engine rebuild my mechanic insisted that I install a preheating system and recommended the Tanis brand. I followed his recommendation and have been extremely pleased with the Tanis heater.

This failure happened to me back in the mid 1980s and I have installed Tanis heaters on each aircraft owned thereafter. I currently use the Tanis TAS 100 on my IO-360. I use this system from Fall to Spring, which is generally October to April. The Tanis heater is very economical to use, so I keep it plugged in 24/7. My electric bill cost to keep my engine properly heated in an unheated hangar is approximately just $12.60 month. I now have the piece of mind that my engine is properly heated and ready for operation.

I have over 20 years of experience with Tanis engine heaters and have had 100% reliability with your equipment. Furthermore, I have not experienced any problems associated with cold weather operation and I strongly recommend to all aircraft owners that they consider using your products.

Jerry Brown
Vice President Business Development and Midwest Manager
Aviation Safety Council, Inc. / Flying Adventures Magazine


On a pure performance basis, the Tanis systems are the clear winners. They heat a bit faster and yield noticeably higher temperatures.

Aviation Consumer, March 2007


Install a Tanis heater and I'll warranty my work to TBO!

Darrell Bolduc
Bolduc Aviation Specialized Services, a leading midwest engine rebuilder
Blaine, Minnesota - Anoka County (Janes Field) Airport


As for the Tanis cylinder system, it deserves the reputation it enjoys. It's well made, effective and remains a favored choice in cold country, where preheat from an electrically robust system is an absolute must. Mechanics we've spoken to speak highly of Tanis design.

Aviation Consumer, March 2001


In our view, the Tanis [preheat system] remains the best choice for continuous preheat or for extremely demanding conditions. This system is very well made, has been around for years and the company has a good reputation for custom installations and for customer service.

Aviation Consumer, February 1997


The Tanis preheat system is safe, reliable, easy to install and most of all, it is a preheat system that provides you with an investment that you will not regret later!

Sky-Tractor Supply, Hillsboro, ND


The best-known multipoint electric preheating systems come from Tanis Aircraft... We do not recommend cheaper electric systems that heat only the oil pan. As you now know, heating the cylinders and case is absolutely essential. Read the entire article at www.avweb.com.

Mike Busch, Editor-in-chief of AVweb


Car warmers were the standard until the fine Tanis preheat system came on the market. The Tanis "Super System," which I use, is good down to -65 degrees F/-54 degrees C. Recommended highly. Read the entire article at www.fepco.com

F. E. Potts, auther of the Guide to Bush Flying

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