Oversizing a Minisplit Heat Pump System - GreenBuildingAdvisor
2021年8月5日 · 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 ...
Visualizing mini-split performance data - GreenBuildingAdvisor
2019年3月14日 · I made some graphs of the capacity and efficiency of these ductless mini-split heat pumps. I figured I’d share the graphs here, since many GBA community members are interested in mini-splits. Take-aways. 1. Capacity and efficiency depend on the indoor and outdoor air temperatures. (See graphs #1 and #2.) 2. Efficiency also depends on how hard ...
Mount outdoor unit on the wall or on the ground?
2017年1月18日 · Seriously, only the princess with the pea under the mattress would be aggravated by the noise levels of a mini-split wall-bracked up an any reasonably framed house. Last summer I slept in a room with a 2-ton Fujitsu multi-split compressor hanging on the 2x4/R13 wall less than 2 feet from my pillow.
Output air temperature of mini splits on heat?
2016年2月15日 · Output air temperature of mini splits on heat? I have a little experience with heat pumps and gas furnaces, and have always noticed the difference in temperature of the air coming through the registers. I read somewhere that heat pump air temps are usually 95* where gas furnaces get the air temp up to 115*. I have looked around but can’t find ...
Mini split head – mounting location considerations
2016年5月11日 · 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’s the best wall height for a ductless mini split heat pump?
2014年10月26日 · I’ve been heating my home with a Mitsubishi Hyper Heat FE-18 heat pump for over a year now and learned a valuable lesson about which wall to place the unit on. I “hid” it on a partition wall, 90 degrees to an exterior wall, and place it up over a wide opening (8 to 9 ft. opening) from the LR to the DR. I thought the air circulation would ...
Surge Protection for Heat Pumps - GreenBuildingAdvisor
2021年1月13日 · Fortunately, it’s easy and inexpensive to add surge protection to a heat-pump system. This article reviews causes of power surges, explains how surge-protection devices work, and discusses installation, service, and sales of HVAC surge protectors. Causes of power surges. Residential heat pumps typically operate at an incoming voltage of 230 ...
Will my generator run a minisplit safely? - GreenBuildingAdvisor
2014年12月13日 · My new house will be heated with two minisplit heat pumps. Here in Maine, we have lots of power outages, so we're also putting in a whole house standby generator. I've been informed by the Fujitsu installer that we should not plan to run the minisplits off the generator when the grid power goes out. We also may install a heat pump water heater and maybe even …
Hydronic heating vs minisplit heat pump - GreenBuildingAdvisor
2020年4月3日 · Since you already need the mini split for AC, might as well use it for heat, the hydronic system is a redundant add on that is definitely not cheap. Even if you are DIYing it, your effort is better spent elsewhere, the perceived comfort people think of just not that much in a low loss home. P.S.
In-Floor Radiant Heat vs. Cold-Climate Heat Pump
2022年2月28日 · Built a HERs 30 house before PV, ACH .6, R-15 under the slab, mini split heat. Ceiling temps are 70 degrees, 68 degrees at eye level, and slab is 55 degrees. House is draft free and comfortable but floor temp feels cold. A more recent project combined both radiant floor heated by air to water heat pump, with standard air to air mini splits.