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Side Intake Homebuilders Cabin Heat Box

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Part# 08-04957
MFR Model# DL-015


This box is identical to the standard cabin heat box, P/N DL-001, except that the air intake is parallel to the firewall rather than coming straight in from the heat muff. This gives the builder the option of running scat tube parallel to the firewall. Total weight is 5.2 ounces and has a 2" inlet/outlet port. Furnished with a flange gasket and four mounting rivets. Can also be bolted to firewall.
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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Worked as advertised. Combined this with the Turbo Heat Muff and installed in a Mustang II.

Darin F
March 24, 2019

This is a pretty well made box but the clicking for the control arm is horrible. Cannot simply connect a Bowden cable directly through the firewall to control like others. Have to come in from below (problematic for right applications) and loop up with a security point. Would return if I could. Also when you secure the unit to the firewall it pinches the control valve arm and binds a bit

Brad M
March 2, 2022


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: What are the product dimensions? Weight?

This will weigh .33lbs. and measures out to 3.07"L x 3.12" W x 3.16 H.

Q: Is there a shutoff valve on this side intake homebuilders cabin heat box?

There is a flap attached to an arm that opens and closes the hole to the cabin. You will need to attach a control cable to the arm to open and close it from the cabin.

Q: I just recieved one of these. I dont see how you can operate the control arm with a control cable coming thru the firewall. The angle on the arm as built is all wrong for a back and forth motion of the control arm. For this to work the cable has to be coming in parallel to the firewall

You may need the standard version(08-04000) for your application.

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