Replies

1. 
   jason_v | Jun 24, 2021 09:44am | #1

   I just went through a similar deliberation. The cost difference is shocking. After combing through data, consulting may forums including this one I found there is no concrete evidence that ether one will perform better or last longer than another, its all anecdotes and conjecture. I would find a contractor you trust first and go with whatever equipment they are most familiar with and comfortable installing. We ended up going with Mitsubishi because in our area LG's support is thinner, and LG suffers from a general lack of service support and replacement part available mostly related to the size and growth of all their business departments, they simply don't have the structure in place to deal with their growth in sales. Mitsubishi is in partnership with Trane and parts and support is more available. the downside was Mitsubishi was 8K more expensive overall.

2. Expert Member
   Dana Dorsett | Jun 24, 2021 12:31pm | #2

   They have about the same max output at +5F and +17F (= close to your 99% design temp) but the shoulder season efficiency when operating in the lowest third of their range is going to be quite different. The COP of that series LG s are pretty crappy at minimum modulation compared to the Mitsubishis, eg:

   https://ashp.neep.org/#!/product/31912

   https://ashp.neep.org/#!/product/34427

   The LG runs a pathetic COP of 1.5 @ +47 when idling along at 1023 BTU/hr vs. the Mitsubishi's 4.6 cruising at 1600 BTU/hr.

   So if you're going with LG it's better to UNDERSIZE the units (to run less time at minimum output) , or go with a different/better LG series, such has the LAU/LANxxxHYV1:

   https://ashp.neep.org/#!/product/25817

3. 
   Jon_R | Jun 24, 2021 03:42pm | #3

   > both modulate down to super low levels

   Contrary to popular opinion, this has little effect on comfort. What matters most is CFM/ton at the load you are operating it. This load is usually much less than design day load.