View Full Version : are Mammoth Rooftop units built well?
02-24-2007, 12:14 PM
Hello HVAC Afficianodos-
I am new to the site... I found HVAC-TALK by looking for reviews on Mammoth rooftop units. It looks like there are plenty of well experienced techs on this site. I currently have 4 Mammoth RTU's on order for a new building. They start at the 2 1/2 ton unit and go through 7.5, 10 and 12.5 tons all units are coming with the gas option and have economizers. These were the brand specified by the distributor that we use for all of our residential purchases. Any thoughts? thanks Mark-
02-24-2007, 12:35 PM
i take care of 2 of the 60 ton Rooftop Mammoth (CustomAire) boxcars.. they were installed in 1983 and are still running today.. while they are now really old.. they work very well.. the only problems i have had have been due to age..
02-24-2007, 01:13 PM
We are looking to control these with the Johnson controls web based Metasys control system for monitoring and control. Do you know of any conrol glitches between these manufacturers?
02-24-2007, 02:44 PM
sorry, i use Honeywell Pneumatics for control..
call or email Mammoth and Johnson.. they should tell you of any issues..
02-24-2007, 04:34 PM
I take care of 2 mammoth units, 160 ton and 200 ton.
They both have hitachi screws and top of the line accessories.
I love them.
but ours are controlled by automated logic.
I am no controls guy but have heard great things about metasys.
02-24-2007, 07:35 PM
We have several of them from 160 to 275 ton, great machines!! Sorry but none on Johnson. Most are on either Honeywell or Alerton, dont think you will have any problems though.
02-24-2007, 08:56 PM
Something sticks in my head that Mammoth doesn't make little guys, just huge custom units. I sorta think they have a marketing agreement with Nordyne and Nordyne light commerical go under the Mammoth name. And that also brings up the next question, who makes it? Someone correct me if I am wrong however.
I sure didn't see Mammoth's website mention smaller units.
Off the brand subject, heard this week that Rheem & McQuay are teaming up. Rheem will provide McQuay with light commercial to 25 ton and McQuay will provide Rheem with 30-60 ton. Later this year.
02-25-2007, 01:49 AM
Mammoths in my experience are some of the most old school, well built, tough as nails pieces of equipment I have ever had the pleasure to work on. I would damn sure take them over any McQuay or Trane RTU any day.
That haveing been said: If you are not prepared to maintain them properly, on a regular basis, then you might as well buy the cheapest POS you can find because they do require proper care and feeding like any thorobred.
02-25-2007, 09:23 AM
I like your passion for hvac equipment!
What do you think of seasons 4 units?
02-25-2007, 09:49 AM
Don't see too many of them.
I mostly see Mc Quay, Trane, Mammouth and a few old Nesbitts.
02-26-2007, 08:49 AM
Yes, I've been informed that Nordyne is making the small Mammoth branded light commercial goodies.
02-26-2007, 11:13 AM
Thanks men for all of the comments on Mammoth. If Nordyne is making the small units do the previous comments still hold true? Are rebranded Nordyne units getting the same thumbs up? -Mark
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