Oversizing a Minisplit Heat Pump System - GreenBuildingAdvisor
WEBAug 5, 2021 · 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 …
Surge Protection for Heat Pumps - GreenBuildingAdvisor
WEBJan 13, 2021 · 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 …
Rules of Thumb for Ductless Minisplits - GreenBuildingAdvisor
WEBJan 30, 2015 · Three roughly 100sf bedrooms and a bathroom take up one half the house. The livingroom and kitchen take up the other half. Two bedrooms off the living room. A bedroom and a bath off the kitchen. My plan has been to put in a cold climate heat pump system with mini split cassettes in each bedroom and one in the livingroom (4 total / 7k, …
Visualizing mini-split performance data - GreenBuildingAdvisor
WEBI 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
WEBMar 3, 2024 · 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
WEBMay 19, 2021 · 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.
Mount outdoor unit on the wall or on the ground?
WEBJan 18, 2017 · 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 …
Does a Heat Pump Condenser Need to Go Outdoors?
WEBApr 24, 2013 · 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.
How to Prevent Condensate Leaks from Ductless Heat Pumps
WEBJul 7, 2021 · Heat from the air moves through the fins and coils and is absorbed by the cold refrigerant inside. As the temperature of the air drops below its dew point, liquid water condenses on the coils and drips into a drain pan immediately below. From there, the condensate runs out a flexible drain hose supplied with the unit.
How to Choose Backup Heat for a Ductless Minisplit System
WEBAug 23, 2021 · Also our crawlspace is built like a short basement and heated by electric resistance heaters, so in a way that's backup heat for the house by continuing to feed heat upward. Distribution was not easy though with a lot of individual rooms, many with tiny loads (500-1000 watts each) and this article parallels a lot of the thoughts we went through.