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Heat Box Tri-Box - Right Hand

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Part# 08-04958
MFR Model# DL-025 RIGHT


This box was developed for builders who want a simple, light, all-stainless box that will fit in tight places, as it does not extend forward of the firewall as far as a standard box. Every part of the tri-box is stainless; including bushings, rivets, etc. It is furnished with a closed-cell silicone gasket. Weight is 9.6 ounces.
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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We’ll made good quality materials looks like it will last a lifetime

Carl W Verified Purchase


December 28, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Part number for this heat box shows a right hand model....is the left hand model available?

Yes, the left hand model can be special ordered. Please contact our sales department for current pricing and availability on the left hand model and to place the special order.

Q: Do you have the overall dimensions of this box or possibly an installation drawing? Need to plan on these or fabricating my own left & right for a Murphy Rebel.

The firewall mounting plate has dimensions of 5.125" x 3.25". The shaft extends 3/4" out of the box with an arm that measures 1.375". The apex of the box measures 2.75" perpendicular to the firewall.

Q: What size hose is this for?

This box uses 2 inch SCAT ducting.

Q: What are the dimensions mounting hole to hole?

The firewall has 2 O.D. tube. From the edge of the tube to the center of the mounting hole measures 25/32 on one end and measures 1-51/64 on the other end. The mounting holes are 3/16 diameter. This photo shows a left Tribox. The right Tribox has the same dimensions but the shaft extends with the arm out of the opposite side.

Q: What is the width of this unit at the firewall and what is the difference between the Right Hand and Left Hand models?

The firewall mounting plate has dimensions of 5.125" x 3.25". Per our product notes, "The RV-10 uses both a left and a right unit, and they also can be ordered separately. If you are not sure which one(s) you need, refer to your firewall plans drawings."

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