tonage of evaporator coil and condenser unit


Old 04-18-18, 07:19 PM
Thread Starter
Join Date: Sep 2015
Posts: 93
Upvotes: 0
Received 0 Votes on 0 Posts
tonage of evaporator coil and condenser unit

I currently have a 3 ton outdoor condenser unit, and 3.5 ton indoor evaporator coil. That is how the home builders installed when the home was built. Now a contractor wants to replace it with a 3 ton outdoor condenser unit, and 3 ton (instead of 3.5 ton) indoor evaporator coil. He said condenser and evaporator coil are made for each other and having same 3 ton indoor and 3 ton outdoor is the correct match. Was the initial builder's install of 3 ton outdoor and 3.5 indoor a mismatch and possible waste of that extra 0.5 ton of indoor evaporator coil resulting in wasted energy? Who is correct? The home builder or the contractor?
Sponsored Links
Old 04-19-18, 03:28 AM
Join Date: Feb 2014
Location: USA
Posts: 2,104
Received 0 Votes on 0 Posts
Quick answer is there both right, either one is OK.
Old 04-19-18, 03:31 AM
Join Date: Oct 2016
Posts: 1,203
Upvotes: 0
Received 26 Votes on 24 Posts
Coils can sometimes have a range of sizes they are approved for, so really both could be right.
Ask for the AHRI match number.
Old 04-19-18, 10:05 AM
Join Date: Mar 2006
Location: Wet side of Washington state.
Posts: 18,471
Received 16 Votes on 14 Posts
Sometimes an evaporator coil rated a half-ton larger than the condensing unit is installed for improved humidity control.
Old 04-19-18, 01:28 PM
airman.1994's Avatar
Join Date: Dec 2005
Location: VA
Posts: 5,741
Upvotes: 0
Received 3 Votes on 3 Posts
You can not go bigger with 410A. They should be the same tonnage. R22 systems you could go up a 1/2 ton. This was done for airflow. the 1/2 ton extra did nothing for saving money or extra cooling.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes