Replies

1. Expert Member
   Dana Dorsett | Jun 26, 2019 05:31pm | #1

   Mitsubishi's Hyper Heat systems are all VRF, but not as fully or in the same way that Mitsubishi's City Multi or LG's Multi-V systems are.

   Sizing it correctly for the loads is the most important thing. The smallest City Multi is something like 5 tons, and way oversized for the loads of most new houses (or even older ones.)

   LG's Multi V S series is a full-on VRF approach with most of the same features at the Multi V (no "S") , but on a smaller scale, and can be sized as small as 2 tons, but the heat recovery feature is only available in the 5 ton version:

   https://lghvac.com/commercial/product-type/?productTypeId=a2x44000003XR0O&iscommercial=true&class=Outdoor%20Units

   https://lghvac.com/commercial/product-type/model-details/?productTypeId=a2x44000003XR0O&modelId=01t44000008fw8H&modelNumber=ARUN024GSS4&iscommercial=true&class=Outdoor%20Units

   Mitsubishi has a little teaser on their City Multi page about an "N Generation - Hyper-heat" informing us that it will be "Arriving Summer 2019".

   https://nonul.mylinkdrive.com/R2-Series/R410A+Systems/R2+Series+OD+Units/

   Maybe they will have a single family residential scale model in there, but don't hold your breath. There was some experimental work done a handful of years ago using City Multi hydro modules with MXZ hyper heat compressors, but not a peep about it since 2015.

   https://aceee.org/sites/default/files/pdf/conferences/hwf/2015/4D-Doppel.pdf

   Mitsubishi does have some smaller VRF systems as small as 3 tons, but they have limitations on operating temperature, and are definitely NOT "Hyper Heating". eg:

   http://meus1.mylinkdrive.com/files/M_PUMY-HP_P-NKMU_2_DATABOOK_M-P0779_02-19.pdf