Lennox Air conditioner in the Attic


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Old 08-13-14, 07:55 PM
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Lennox Air conditioner in the Attic

WARNING MIGHT NOT BE THE CORRECT PLACE TO POST BUT HERE GOES

HI,

I live in Montreal, Canada and over 15yrs ago installed a Lennox Air conditioner in the Attic with the main ducts and flexible duct. The heat/compress is outside and the coil is in the attic. All the Returns and vents are from the ceiling, all the ducting either fixed/metal or flexible ducting is insulated at the time.

What I’ve observed is the following
Attic Temp Vent Air
25C 13C
37C 18C
50C 21C

wondering if this is normal?


Alberto
 
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Old 08-13-14, 08:32 PM
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Welcome to the forums.

We're going to move this thread to air conditioning and cooling systems.
The crew will stop by and respond there.
 
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Old 08-14-14, 05:18 AM
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Outside air temp, inside air temp, temp at the return vent and temp at the discharge vents (temp split) would be more beneficial to the pros on here.
 
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Old 08-16-14, 01:56 PM
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How close to the return and discharge do I need to be? The unit is in the attic, is there a easy way with Lennox Machines to get a reading of the temperature at the return and discharge without having to physically climb into the attic?
 
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Old 08-16-14, 02:09 PM
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Take temp reading at a return grille and at the supply register. That will get you close and save a trip to the attic.
 
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Old 08-22-14, 04:55 AM
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The weather in Montreal has been chilly 12C at nite....haven't turned on the AC or should I do it anyways the test?
 
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Old 08-22-14, 10:16 AM
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So you are running in heat mode? Where did you take temp readings in your first post?
 
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Old 08-25-14, 06:34 AM
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It's only a Air conditioner Unit and not a Heat pump.

The readings I took them back on July 4th we had a very hot stretch. I have a thermometer in the attic and a thermometer to measure at the supply vent in my room.

Yesterday it hit 30C in montreal but only turned on the AC unit end of day, i took the following small TWO SAMPLES sample

6:00pm
Attic Temp 37C
REturn/Discharge 25.9C
Supply 18C


10:00pm
Attic Temp 27C
REturn/Discharge 25.9c
Supply 16C
 
  #9  
Old 08-25-14, 08:02 AM
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Sorry I forgot the temp of C, not F. Please ignore my post. Thank you for point it out.
 

Last edited by clocert; 08-25-14 at 09:08 AM.
  #10  
Old 08-25-14, 08:06 AM
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FWIW, 7.9° C = 14.2° F and 9.9° C = 17.8° F on the deltas.
 
 

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