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 ...
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 ...
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 ...
Heat pump / mini split recommendations - GreenBuildingAdvisor
2024年3月3日 · I got 3 quotes a year ago for ducted heat pump or mini split systems ranging from 36k to ~50k excluding Mass Save’s rebate. Based on what I’ve read here, those systems were oversized (2 3-ton ducted systems, or mini splits in every room). I thought the estimates were too high and ended up spending the money on solar panels instead.
How to Reduce Refrigerant Leaks from Heat Pumps
2021年5月19日 · R-410A, the refrigerant used in most new heat pumps in North America, has a 100-year global warming potential 2088 times that of CO2. If the 3 to 4 pounds of R-410A in a small ductless heat pump system were to escape into the atmosphere, it would cause as much warming as a gasoline car’s annual emissions.
Split-System Heat-Pump Water Heaters - GreenBuildingAdvisor
2015年2月6日 · In Japan, heat-pump water heaters are configured differently; they have an outdoor compressor rather than an indoor compressor. (The outdoor units of these heat-pump water heaters resemble the outdoor units of a ductless minisplit.) This type of air-to-water heat pump is called a “split system” heat-pump water heater; it is designed to ...
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.
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 ...
Does a Heat Pump Condenser Need to Go Outdoors?
2013年4月24日 · Mini Split system Heat Pump condenser in large attic? Here is my problem. I am wanting to put in a 9,000 BTU split system Heat Pump in my top floor condominium. The condo association will not allow the condenser to go outside. I have a large attic (1500sf; 12ft high in center) available. Attic has 18 inches of ceiling insulation.
Mount outdoor unit on the wall or on the ground?
2017年1月18日 · I am close to installing 3 fujitsu mini split units at our home under construction. Two outdoor units will be installed near each other, with the third installed in a different area of the house. The HVAC installer asked if I wanted to mount them on the wall or on the ground. I can't decide which I would prefer. Any thoughts on the pros and cons of each? I …