| All of the cabin heat box units can be either riveted or bolted to the firewall of your aircraft. The mounting flanges have holes for both bolts and rivets. Four stainless steel blind rivets and a mounting gasket are furnished with all units.
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STANDARD HOMEBUILDERS
CABIN HEAT BOX
P/N DL-001
This cabin heat box has been engineered to be the smoothest, most efficient and lightest heat box built. Fabricated from aircraft-grade aluminum with stainless steel shaft, arm and flapper. Originally designed for use on the popular RV-4 homebuilt, but is applicable to most other designs. Total weight is only 5.2 ounces. Furnished with a gasket flange for the forward side of the firewall for leak-free ducting of warm air to anywhere the builder wants it. Inlet and outlet are 2 inch OD 6061-T4 seamless alum. The body of the box is constructed of 5052-032 alum. The outlet tube extends through the firewall so that scat tubing can be attached to route the warm air. Superior craftsmanship and quality. Over 4,000 sold to date.
PN 08-04000
$106.95 
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DELUXE HOMEBUILDERS
CABIN HEAT BOX
P/N DL-002
This cabin box is our first modification to our standard heat box. The only difference between this and the standard is that the deluxe cabin heat box has one inlet and two outlets; the second outlet must be used to dump and route, via 2" scat tube, the warm air away from the low plenum area when heat is not being used in the cabin. (It is very important not to run the dump tube to another box on the other side of the firewall, because a constant flow of air is necessary to ensure that the heat muff does not overheat.) The weight on this unit is 5.5 ounces.
PN 08-04005
$120.95
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DELUXE HOMEBUILDERS
CABIN HEAT BOX STAINLESS STEEL
P/N DL-003
This box is identical to the Deluxe Homebuilders Cabin Heat Box except that the tubing that goes through the firewall and the mounting flange are also stainless steel for extra protection from fire. Weight is 7.1 ounces.
PN 08-04010
$117.85
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| 2 ½" INLET AND 2" OUTLET HOMEBUILDERS CABIN HEAT BOX
P/N DL-004
This box is identical to the deluxe stainless steel cabin heat box, except that the inlet is 2 ½" OD so that it can be used on larger heat muff applications where the builder is using 2 ½" scat tubing. This box is currently being used on the MICCO certified aircraft. Weight is 7.2 ounces.
PN 08-04013
$129.95
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| 2 ½" OD INLET and 2 ½" OD OUTLET HOMEBUILDERS CABIN HEAT BOX
P/N DL-005
This box is identical to the deluxe stainless steel cabin heat box, except that the inlet and outlet are 2 ½" OD so that this box can be used when the builder wants to use 2 ½" scat tubing throughout the project. (This box was used on the Cirrus SR20 certified aircraft. The SR20 now uses the DL-008 box listed below.) Weight is 6.3 ounces.
PN 08-04015
$145.95
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DELUXE HOMEBUILDERS CABIN HEAT BOX, ALL STAINLESS STEEL
P/N DL-006
This box was recently developed in response to customer requests. With the exception of brass shaft bushings, this box is constructed entirely of stainless steel, including all SS blind rivets. Like the deluxe boxes, this unit has a 2" inlet and 2" outlets. For the added durability of all stainless steel, the box still only weighs 10 ounces.
PN 08-04025
$137.95
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CABIN HEAT BOX
P/N DL-008
2.5" inlet and 2.5" outlet. The inlet is positioned 90 degrees to the outlet, versus straight through in all of our other boxes. The mounting plate, shaft, flapper and bushings are all stainless steel. The rest of the box is anodized aluminum. This box is certified and is the box currently being used on all Cirrus aircraft. Furnished with silicone gasket. Weight is 6.3 ounces. Certs are available from us.
PN 08-04959
$258.95
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SIDE INTAKE HOMEBUILDERS CABIN HEAT BOX
P/N 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. Furnished with a flange gasket and four mounting rivets. Can also be bolted to firewall.
PN 08-04957
$109.50
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WARM/COOL AIR SELECTOR/MIXER
P/N DL-016HCV
This unit has not only the capability of providing warm air to the cockpit but also cool air, or a mix of both.
There are two parts to the unit. The "T" section (engine side of firewall) has a flapper to direct cool air from one side and/or warm from the other side. This section is designed to be riveted or bolted to the firewall.
The short expanded section slips over the protruding tube and is clamped with a stainless steel hose clamp. The flap in this section closes off all air from the unit. The hose clamp, a gasket and four stainless steel blind rivets are furnished.
The shafts, arms, and flapper valves are all stainless steel. The bushings are brass and the tubing is 2" OD 6061-T4. The weight is 5.2 ounces.
PN 08-00629
$136.95
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ALL STAINLESS STEEL TRI-BOX
P/N DL-025
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.
PN 08-04958
$153.95
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Engine Parts - Heaters - Homebuilders Heat Boxes