Twin-Air Products

What applications are Twin-Air Products used in?

Our products are used in Ford Transit, Dodge ProMaster, Cheverolet Express, and Mercedes Sprinters vans or cut-away chassis.  We also have an air/heat unit for the truck sleeper market.

Can I install the system myself?

 Most likely no.  Our systems are usually added to chassis before the interior is put in, and the installation would require evacuating and recharging the a/c system.

 What is included with a Twin-Air system?

Our systems come complete with everything needed to install the a/c-heat system.  All hoses, brackets, valves, wiring, and fittings are provided in our “kit”.  Also, our kits are customizable by our customers.  Items can be added or subtracted from the kit based on customer use.

Are Twin-Air Systems R-134A compatible?

Yes, our systems are compatible with R-134A systems.  Our systems will also be compatible the 1234yf refrigerant systems as they are phased in.

 What electrical requirements do Twin-Air systems have?

Any component requiring electricity such as our blower motors, blower fans, or a/c compressor would use 12 volt DC.

 Do Twin-Air systems meet government standards?

There aren’t any governments requirements as far as the systems we put into vehicles.  The only standards we would have to abide by are the government standards on disposing of refrigerant.  However, we only charge a/c systems, we never have to dispose of it.

 How do I know how much refrigerant to charge my system with?

Each system sent will have  a sticker to be placed underneath the hood stating how much refrigerant to charge the vehicle with.  For the most part, any “tie-in” system will get an additional 1 lb. over factory charge.  Also, pag oil recommendations are stated on our sticker.

 Why is my air conditioning/heating not working properly?

Most of our systems are combined air conditioning & heating systems.  If the a/c is not working most likely hot coolant is getting to the system and not allowing cool air to come out, or there is a leak in the system somewhere and the system is no longer adequately charged.   If the blowers are not working possibly a fuse is blown, or a relay not working correctly.

 Are there any regular maintenance requirements?

No, as long as the a/c system is charged, and the coolant system as enough coolant and is purged, our systems will be fine.

 What model years do Twin-Air van conversion products fit?

Generally, our products are used in new current model year vehicles.  However, we have fittings for Fords, Chevy’s, Mercedes, and Dodge’s to about model year 2007.  Maybe even older, but that would depend individual circumstances.

Where is the Twin-Air system located within the van conversion?

Generally in the back of the van.  However we do offer an overhead “mid-mount” option for Dodge ProMaster’s.  Our Floor mount systems generally fit behind the driver side rear wheel well.

 How does the rear heating/air conditioning system work?

One of 2 way’s: 

  • As a “tie in” to the front a/c system. In this scenario we use the front compressor and condenser, and we add an auxiliary evaporator in the back. 
  • As a “stand alone” system we add an engine belt driven compressor, and a condenser along with our rear evaporator. This makes our system independent from the front system.
  • In both cases, we achieve heating though the vehicles coolant system. We “t” into the coolant system to push hot water back to our rear heater core for heat.  An inline water valve closes to prevent hot coolant from getting the unit while a/c is on.

How long should it take for the auxiliary unit the heat or cool?

Our units should cool the air by about 30 degrees from whatever the ambient temperature is.  With a Floor mount unit this will take 15-20 if the doors remain closed.  With our overhead systems it will only take 8-10 minutes if all doors remained closed.

Does Twin-Air do any conversion work?

No, but we do work with converters with any solutions that may be needed with a/c and heat units, and specifically with designing ducting solutions for the conversions.




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