Thread: Custom Heater & AC housing

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It's a long shot, but do you know if it is possible to duct heat from the trunk to defrost the front windshield?
Thanks
Mutt

Originally Posted by Mutt's37Buick

It's a long shot, but do you know if it is possible to duct heat from the trunk to defrost the front windshield?
Thanks
Mutt

Some of the earliest ac units, by Chrysler I believe, were trunk mounted with clear plastic "horns" on the package tray to direct the air flow forward in the cabin. They quickly moved the evaporator under the dash for improved performance. Here's a modern unit built around that same concept - Classic Auto Air - Air Conditioning & Heating for 70’s & Older Cars & Trucks.

1) Do you know if it would be possible to convert the stock 37 Heater to 12 volt and use it primarily for defrosting windshield. A trunk mounted unit could then be used for defrost rear glass, cab heat, and cab AC.
2) How would I extend the compressor lines for my '95 AC all the trunk?
Thanks
Mutt

Originally Posted by Mutt's37Buick

1) Do you know if it would be possible to convert the stock 37 Heater to 12 volt and use it primarily for defrosting windshield. A trunk mounted unit could then be used for defrost rear glass, cab heat, and cab AC.
2) How would I extend the compressor lines for my '95 AC all the trunk?
Thanks
Mutt

Mutt,
On cars with AC the defrost setting runs the compressor to dehumidify the air while adding heat, clearing fog about ten times faster than heat alone. Seems to me you're making a lot more work for yourself, but I expect converting your stock heater to 12V is nothing more than changing out the fan motor, or installing an in-line resistor to drop the voltage to the fan to 6V (I'd replace the motor and run it at 12V).
On the compressor lines, you just have new long lines made up with the necessary fittings on each end to mate to your compressor and evaporator. You're also going to be extending your heater supply and return hoses the length of the cabin, too.

Thanks for your help

If I use a trunk mounted ac & heater unit, I may be able to run a defrost line from the rear into the front stock heater.
Can someone tell me:
1) When rear heat is used on a vehicle with front heat does the outlet from the front heater core feed into the rear core or is there some method of running in parallel?
2) What is the longest ventilation duct anyone has seen coming off a a rear a/c unit and how large was the duct?
Thanks