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- Visualizing mini-split performance data - GreenBuildingAdvisor
I sanity-checked against Jon Winkler’s 2011 report, “Laboratory test report for Fujitsu 12RLS and Mitsubishi FE12NA mini-split heat pumps”, and various real-world monitoring studies (Roth et al 2013, Faesy et al 2014, Ueno et al 2015, Williamson et al 2015, Korn et al 2016, Sutherland et al 2016)
- Undersized Minisplit Heat Pump - GreenBuildingAdvisor
Cooling performance in the heat wave You can see from the numbers above that my house has a cooling load of about 21,000 BTU hr and the heat pump has a cooling capacity of a bit less than 19,000 BTU hr According to those numbers, my heat pump has only 88% of the capacity it needs to keep my house cool on a design day
- Fresh air with heat pump or minisplit - GreenBuildingAdvisor
This is why “mini splits” are so confusing! A ducted heat pump can be either traditional or a minisplit The indoor unit isn’t what makes something a minisplit, the outdoor unit does I’d recommend a ducted heat pump and I’d run ducts to the bedrooms (and all rooms if possible)
- Oversizing a Minisplit Heat Pump System - GreenBuildingAdvisor
There's nothing quite like a right-sized heat pump In zone 5b, have 28 6 kBTU heat for 2,100 sq ft with three ducted heads Heat load calculations (required for HERS) appear accurate and align with utility bills I spot filled a few air leaks, made appropriate filter choices (type and size) and insulated the air handlers Heat pump handles
- HVAC – Gas furnace vs. heat pump vs. ducted minisplit
This leaves the choices of: ducted mini-splits (3 heads), 3 zone split system heat pump, or 3 zone high efficiency gas furnace with piped outside combustion air intake Any system with have an independent ERV There will be a base charge for natural gas service no matter what per item 2 above
- Mini split head – mounting location considerations
In cooling dominated climates, the best the place to attach the indoor "head" of a mini-split heat pump system is in a mechanical closet, connected to ductwork That is to say, I think it's a BAD idea to use ductless mini-splits for a whole-house application in a cooling dominated climate
- What is a Minisplit? - GreenBuildingAdvisor
In that sense, a minisplit is just what its name says it is: a small split-system heat pump Where it gets confusing is in the different ways manufacturers make these lower-capacity, split-system heat pumps A minisplit, for example, can have a conventional fixed-capacity compressor or an inverter-driven variable-capacity compressor
- How much are mini-splits really affected by altitude?
Hello - I'm sizing a heat pump mini-split for my 20x20 garage, which has been pretty well air sealed and insulated with closed cell foam I've had a series of installers out and the recommendations were all over the place, ranging from 12k to 18k BTU, and from $3k to $12k Two of the companies actually bothered to do a load calculation, and I tried it online as well - but those numbers had a
- Combined HRV and mini-split - Green Building Advisor
Are there commercially available units which combine heat-recovery ventilation with an air-to-air heat pump? I'm imagining something that could transfer heat from the exhaust duct to the supply duct of the HRV as needed during the heating season and vice-versa in the cooling season Heat transfer within the HRV would be wholly conventional and the additional heating cooling would be introduced
- Hydronic heating vs minisplit heat pump - GreenBuildingAdvisor
Keep seeing comments better to go with the mini split heat pump (thermo climate zone 4) I already have many components for the in floor radiant So the question why would I not go with the comfort of in floor or just sell it all and go with what some consider more energy sipping mini split hp I am shooting for 1 ach 50pa
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