Energy efficiency of multi zone mini splits vs. multiple single zone ...
WEBJul 12, 2019 · For a given heating load size, would 3 higher efficiency single zone mini splits use more or less electricity than 1 multi zone system? For example, we are contrasting a system that uses 3 Gree Sapphires (9k, 9k, 12k). These supposedly have COPs of 4.47 (for the 9k) and 3.8 (for the 12k) whereas a 30k 3 zone system has a COP of about 3.3. My ...
Minisplit efficiency – multiple single zone vs single multi-zone
WEBJul 2, 2014 · The smallest mini-split is rated 9000 BTU cooling, but there are 6000 BTU options for multi-splits. If a zone has a design load of 4000 BTU you'll probably get better efficiency (and definitely better comfort) out of the multi-split with a 6000 BTU/hr cassette than a 3/4 ton mini-split.
Multiple Minisplits vs. Multizone System - GreenBuildingAdvisor
WEBJan 24, 2022 · If min output is 35% of rated, then that's 9.8k, which feeds the 15k, 12k and 9k heads. Divide 9.8k by three zones and you have ~3.3k per zone. If it's cold (demand for heat), then 3.3k per zone is not excessive (i.e., 9.8k for entire house with largest space (15k zone) north facing with excessive fenestration).
Problems with Multizone Minisplit System - GreenBuildingAdvisor
WEBFeb 14, 2022 · Problems with Multizone Minisplit System. After a gut renovation and multiplit installation, electricity bills are sky high and so is the indoor humidity. By Scott Gibson | February 14, 2022. After renovating the inside of his Boston area house, Levi Tofias had a ductless minisplit system installed. It …
The Multi-Zone Heat Pump Issue - GreenBuildingAdvisor
WEBApr 8, 2019 · In cold climates, multi-zone heat pump systems (or multi-split systems) are developing a reputation for under-performing in terms of energy efficiency. In a nutshell, this happens when you ask a large capacity heat pump to eke out small amounts of heating or cooling. Your efficiency will come nowhere close to what was advertised or what you ...
One Indoor Unit in Multisplit System Not Cooling Air
WEBDec 12, 2022 · Hi, We had a new Mitsubishi multi split system installed early this year with one outdoor unit hooked to 5 indoor units. Couple weeks ago we were turning on the entire system for the first time (we had a long indoor furnishing work done by ourselves) and found two of the 6k indoor units had problems: 1) One of the 6k unit does not produce cool air 2) while the other one would automatically ...
Ducted Heat Pump OR Multizone Mini Split - GreenBuildingAdvisor
WEBFeb 26, 2022 · By going with ducted instead of multi-split, you’ve probably saved the cost of dozens of manual Js. For what it's worth, I hired an HVAC consultant to help design our HVAC system, a portion of which had a separate 600 sq ft ADU. For that area, he recommended a single zone ducted mini split (PEAD).
Rules of Thumb for Ductless Minisplits - GreenBuildingAdvisor
WEBJan 30, 2015 · Martin - In our close-to-Passivehouse 2750 sq. ft. office building in Hinesburg, VT, we are about to swap out our two Mitsubishi MXZ-3C24NAHZ2 multi-zone outdoor units that drive our five indoor heads (two MSZ-FH15NAs, one 12, and two 6s) with five matched outdoor units after experiencing significant cycling, poor …
noise in Fujitsu multi zone mini split - GreenBuildingAdvisor
WEBFeb 6, 2022 · I recently had a multi-zone heat pump installed at our house 2 hours north of Toronto. The issue I’m having is the 12k unit makes significant noise when in standby or even turned off. The sound varies between a loud hum to a gurgling sound. It happens when the 24k unit and condenser are running. The 24k unit doesn’t exhibit the same issue.
Problems with Multi-Zone Mitsubishi Minisplit
WEBJun 21, 2021 · The first is that the zone for the main level bed/bath/closet/half bath/laundry continuously cools, even after the set point has been reached. I have it set to 73 and the t-stat usually sits at about 68 in there with 45-50 degree air blowing from the register. This would be true even when the other zone t-stats are set to 68 and showing 70-74 ...