<a href=showthread.php?s=&postid=15493587#post15493587 target=_blank>Originally posted</a> by larryfl1
whats everyones thought on the difference in the btu on the teco vs jbj???
The BTU is hugely important but there is no standard in the chiller industry for measuring it. It is dependant on the ambient temperature of the area in which the chiller is located. So if a chiller was set up in a 70 degree room and pulled the temp of a volume of water down a specificed number of degrees (I believe it is 2 degrees F), it would get a higher BTU rating than the same exact chiller pulling down the same volume of water by the same amount , but running in a 80 or 90 degree room.
The JBJ chiller could very well have a BTU rating stated at 70 degrees ambient as opposed to another brands 1/3 hp chiller having a lower BTU rating because it was tested at 80 degree ambient temperature. And the lower BTU rated chiller could actually cool your tank quicker despite the lower BTU rating.
The lower the ambient temp. where the chiller is located the more efficienctly it will cool the water and the higher its actual BTU rating would be. The same exact chiller would be rated with a higher BTU rating if it were tested at 70 degrees instead of 80 degrees, or 80 degrees instead of 90 degrees.
I used a 1/3 hp chiller that had a higher BTU rating than another 1/3 hp rated chiller by almost 500 BTU's and the lower BTU rated chiller pulled my same system down by 2 degrees in less time than the higher BTU rated chiller pulled it down by 1 degree ... (same Ranco controller). BTU rating is important but again, there is no standard ambient temp. in which the manufacturers are required to use to state it.
The situation with the TECO chiller from what I see ... look at the BTU rating AND the power it draws (wattage / current) compared to other 1/3 HP rated chiller. The lower BTU rating could possibly be explained if it were tested at a signifigantly higher ambient temperature but you cannot explain the fact that it uses nearly 1/2 the wattage of other 1/3 hp units AND also has a lower BTU rating.
The lower wattage is not because it has some type of magical efficiency. Personally, this would "tell" me that they are overstating the HP rating of their chillers.
And ... a 1/3 hp rated chiller that is in reality a 1/5 hp or 1/4 hp chiller will be produce less noise than a true 1/3 hp chiller. Some compressors and fans do run quieter than others but very often a "quieter" chiller is a chiller who's ratings are overstated.
Look at BTU AND power consumption when comparing different brands of chiller with the same HP rating ... and even then, the BTU rating doesnt tell you everything because they dont tell you a what ambient temperature they state the BTU rating.
For the record, I personally wouldnt buy a Teco or a JBJ chiller.
Just my observations and IMO, IME etc. Draw your own conclusions ...