Our house is a mid-western 1250 square foot, 2-story, older brick house with boiler heat(cast-iron floor radiators), newer windows, and the old-style, fiber-board insulation behind the brick.The MSZ-GL18NA unit is the 1st floor unit, and the other 3 are for our 2nd floor bedrooms.The reason there is only 1 unit downstairs is because it is, fortunately, a fairly open floor plan.The upstairs bedrooms are all separate though, which is why each bedroom needs their own unit.I feel the installers did a great job getting it all set up and running.The system cools the house in no time at all, however, I've been having a heck of a time controlling the humidity.I first noticed that the house felt kind of clammy and I could feel the moisture in the air about a week after installation. Formed in 2018, Mitsubishi Electric (METUS) is a leading provider of ductless and VRF systems in the United States and Latin America. Even though the house was very cool, I could still feel it. Dry mode only reduced the humidity a few percentage points.I then bought 2 of those in-house weather stations that monitor temperature and the humidity level.Both the 1st and 2nd floor humidity levels hover between 55% and %65 throughout the day and night.For example, right now, it's 80 degrees outside with a humidity level of 60%. Your recently viewed items and featured recommendations Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. The HVAC equipment is as follows: Outdoor unit: MXZ-4C36/5C42/8C48NAHZ Indoor units: MSZ-GL18NA, MSZ-GL12NA, MSZ-GL9NA, MSZ-GL6NA. Only 11 left in stock - order soon. Is that a calculation I could do myself? Daikin 12,000 BTU 17 SEER Wall-Mounted Ductless Mini-Split Inverter Air Conditioner Heat Pump System 15 Ft. Mitsubishi 30000 BTU Mini Split superstore. 2P for 9000 and 12000 BTU CondensersWostore 50 Ft. Copper Pipes 3/8" & 5/8" for Mini Split Air Conditioner Insulated Coil Line Set 1/2" PE Made in USA HVAC Refrigerant with NutsYou’re seeing this ad based on the product’s relevance to your search query.FlareSeal Model MSP-0406 Leak Free SAE Flare Connections - Refrigerant Leaks Refrigeration, HVAC, Ductless, Schrader Valve or Mini Split Applications (1/4", Mini Split Pack - (2) 1/4" and (2) 3/8")Outdoor Mounting Bracket for Ductless Mini Split Air Conditioner Heat Pump Systems, Universal, 9000-36000 Btu CondenserMitsubishi MAC-418FT-E Central Air Conditioner Air Filter Genuine Original Equipment Manufacturer (OEM) partForestchill Foldable Wall Mount Bracket, fits Mini Split Ductless Outdoor Unit Air Conditioner Condensing Unit Heat Pump System Condenser Universal Design, support up to 280lbs, 9000-18000 BTU, 1-2POriginal Mitsubishi Electric Mr Slim E12E83426 Air Conditioner Remote Control (KM09F)You’re seeing this ad based on the product’s relevance to your search query.Mitsubishi Electric Mr Slim E12E79426 Replacement Remote (KM09E)KT-E03 Universal Remote for All Major Brands of Mini Split ACWostore 15 Ft. Copper Pipes 1/4" & 3/8" Without Nuts for Mini Split Air Conditioner Insulated Coil Line Set HVAC Refrigerant WhiteForestchill 7.5ft Decorative PVC AC Line Set Cover Kit Tubing Slot for Central Air Conditioner, Mini Split A/C Units and Heat Pump System,Condenser Unit (4in)Forestchill 14ft Decorative PVC AC Line Set Cover Kit Tubing Slot for Central Air Conditioner, Mini Split A/C Units and Heat Pump System,Condenser Unit (4in)Mitsubishi Electric Mr Slim E12E79426 Replacement Remote (KM09E)CHOUBENBEN Replacement Mitsubishi Electric Mr Slim Air Conditioner Remote Control MS-A09WA MS-A12WA MSY-A15NA MSY-A17NACHOUBENBEN Replacement Mitsubishi Electric Mr Slim Air Conditioner Remote Control MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A09NA-1 MSZ-A12NA-1 MSZ-A15NA-1 MSZ-A17NA-1CHOUBENBEN Replacement Mitsubishi Electric Mr Slim Air Conditioner Remote Control E02268426 MS09NW MS12NN MS15NN MS17NN Your recently viewed items and featured recommendations The on/off cycling caused by oversized equipment results in lower latent cooling (humidity removal), lower comfort, and lower operating efficiency. By using our Services or clicking I agree, you agree to our use of cookies. High humidity levels with newly installed Mitsubishi Mini-Split AC system. Not enough turn down for smallish bedrooms.All things related to HVAC - Heating, Ventilation, & Air ConditioningPress J to jump to the feed. The single-zone mini split system from Mitsubishi is sophisticated and smart. Fujitsu’s quietest indoor unit runs at 21dB(A). Both Fujitsu & Mitsubishi mini-splits are top of the line at noise suppression. Then my uncle visited, and noticed it too.So I started to play around with the settings. Press question mark to learn the rest of the keyboard shortcutsCookies help us deliver our Services. Run AC on low fan setting.Do you have a copy of the room-by-room load calculation used to size the equipment? After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in.After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. 6. The system is amazingly energy-efficient and smart. It features the advanced filters, being suitable for the states with cold climate, self-adjusting and controlled wirelessly from a remote smartphone or PC device. Installation Kit & Wall Bracket (230 Volt), 12, 000 BTUPVC Decorative Line Cover Kit for Ductless Mini Split Air ConditionersPioneer Mounting Bracket for Mini Split Ductless Air Conditioner Condensing Unit.