Micro Heat Pumps - Window, Portable and Saddleback
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- เผยแพร่เมื่อ 19 ก.ย. 2023
- Learn how Micro Heat Pumps can provide efficient supplemental heating and cooling for apartments and small spaces at low cost.
Micro heat pumps come in 3 configurations - Window units which look like window air conditioners, Portable units which are ducted to the outside through windows with vent kits, and Saddle Bag heat pumps that straddle the window ledge with part of the device inside and part outside which allows the window to close more fully. These units are lower cost than full home heat pumps and can be installed DIY by plugging into a 120V outlet. They provide energy efficient heating and cooling which can be ideal for apartments or single rooms in larger homes.
Saddle Bag Heat Pumps are an emerging technology that could be vitally important to help building and homeowners heat and cool rooms more cheaply with faster installation times and without completely retrofitting a heating system. Cold climate versions are expected to become available in 2024.
Join us as we dive into the world of micro heat pumps and learn about the latest options, performance and consumer satisfaction test results and where the industry is heading with our expert guest - Christopher Dymond from Northwest Energy Efficiency Alliance. - วิทยาศาสตร์และเทคโนโลยี
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I'm a contractor , and he's right, been in this business 50 years, yes I'm old, but i have supplemental in conjunction with the main unit. How many days are u going to be at max design (degree days on the design) ? People pay a huge sum of money for just a few days out of design. , so yes this guy's right supplement and save yourself money. Set your baseboard heat to supplement at a outdoor temp ,your contractor can set this up.
The Midea Duo portable heat pump variants have a defrost function! They're limited to 40F as you stated but many people on reddit have already figured out moving the outdoor sensor to a warmer location will keep these models running in colder temps. In colder humid conditions they defrost frequently.
Slightly tangential but I've heard of people using windlw ACs for walk in coolers rigging a thermostat activated lightbulb to heat the temperature sensor in those applications (in fact it's a YT vid for an $80 alternative to the much more expensive Coolbot controller.)
Can confirm, in fact I even put a video on my channel, the duo can defrost.
One physical issue I have not seen addressed and is definitely an issue of concern with DIY is the size and strength required to install the window units. Even though I needed a larger capacity unit from the one I purchased, I could not lift the larger units. Instead I purchased two smaller units. The lightest unit I found still weighed 40 lbs and at 4'9" in height, had a difficult time lifting these units into place. More and more women and the aging population mean that people with less strength find themselves in a position of having to do these kinds of projects themselves. Larger and heavier units mean it will be difficult for this segment of the population to use/install.
I have never seen a micro heat pump for sale. Please give links to suppliers. Great video. Thank you
Micro heat pump = Window A/C. They are for sale at Wal-Mart.
@@Sethermiester Wrong. Only one may be available at Walmart and it won't heat below 40 outside temp. Most window AC units with heat have a separate resistive heater built in and do not actually reverse the refrigerant to provide heat inside.
They are not called micro heat pumps on retail sites. They are usually referred to as Portable AC with Supplemental Heat, or Window AC with supplemental Heat. Here is a fact sheet with some of the models we recommend. static1.squarespace.com/static/5bb2379dca525b5810509ec1/t/64274541529ec679daf107ca/1680295233936/Portable+Heat+Pumps.pdf
25:45 You are wrong! Window units of saddle A/C on the market now shut off because they can't drain outside. You got to manually drain them on the inside. They could solve this by having both the condenser and evaporator on the outside and just have air duct work go across the window or they could install a pump to pump the inside condensation to the outside. Water splashing outside is not a concern for me.
I think Midea has PTAC units out now. I am thinking about these on the back side of my house. I already have electric baseboard in my home so my thinking is electric is already run. Remove the electric baseboard and wire in the PTAC to the 230v lines installed for the baseboard. I am trying to get pricing info on these but they are a bit invasive.
I have the Midea inverter AC units for a few years now. Wow they made a huge difference in lowering my electric bill over the normal 4 window AC units I had. I would jump at the opportunity to have one of those window units at the right price to both cool and heat. However at that a 3k price I would rather have a permanent mount mini split or PTAC units. I am handy enough to install them as a DIY project. Electric baseboard sucks.
Thanks for all the great info. I have a unique situation I think these would help with. I'd love to be a tester if there's any way to get in touch with one of these companies. I have a single family home with a small side porch under 100 sqft that has been enclosed and insulated with a single door between it and the house. I want to make a it a year-round room, but can't get HVAC ducting to it. The exterior walls are lined with windows, so I can't install a mini split and it would probably be overkill for the small space. Resistance an oil heat options use too much energy since I'm in a cold environment that is generally below freezing in winter.
I've looked for the smallest mini-split available hoping to find something very tiny, but they don't get small enough to mount to the less than 10" of wall space between windows and ceiling. I looked at the Gradient, but at it's current price of $5,000 it's much too expensive.
I really wish there was a much smaller version of a mini-split that would work in tiny spaces like mine, but it looks like the best option will be one of these window units. I'll just have to wait for prices to come down.
I have through the wall mounted my Frigidaire FFRH0822R1 8,000 BTU Room Air Conditioner with Supplemental Heat. It is a heat pump down to about 40F and then has electric resistance heat at a lower BTU value. Sadly, it is now discontinued.
Where do i get one of those 17 degrees models?
These cold climate models are not available yet unfortunately.
How many amps does this need? What if you have other things running on that same circuit. It will likely blow the breaker. Look at heaters and the draw they have.
A heat pump has a much lower energy draw, that is why they better then a standard heater. Looking forward to the cold climate versions coming out.
@@MirrimBlackfox Can you elaborate on what the draw is? Thanks for the reply
@@RobSnow-ui4sz It really depends on the unit, I just know that heat pumps are quite a ways more efficient then a heater is, but to know exactly how much you would need to look up the specifications of the specific unit.
The Midea Duo unit (14,000 BTU) has inverter technology, so rather than just switch on (big draw) and off, it allows a sliding power draw based on how much work it has to do.
I found my unit is typically under 1.2KW, (10Amps at 120V) and usually around 700W (6A at 120V). Users results may vary depending on humidity, outside and inside temperatures, etc.
There is a outdated patent on a heat pump where it defrosts while heating, offering nearly double heating capacity. I wonder why all these people don't look at patent applications. It's amazing what's out there.
Stupid question: if a conventional window heat pump can only withdraw heat from air down to 40°F and must then use resistance heating anyway, wouldn't it make more sense to use that supplemental heat to preheat incoming ambient air? All else being equal (which of course tends to never be the case) wouldn't raising 30°F ambient source air to 41° be a much better use of energy potentially allowing a COP return on that investment approaching the unit COP when operated above 40°? Besides if the outside ambient temperature is at or below 30°F it's supplemental resistance heat must be heating output air much more than 11° to meet comfort standards above body heat unless ambient inside air is kept to 87°F or more.
Granted I'm not allowing for the ratio of outside source air flow vs the flow of conditioned interior air but still, wouldn't expending that additional supplemental energy _before_ the heat pump allow for more a greater COP than 1?
Whether you come out ahead would also depend on the relative air flow rates of the outside are vs inside air. It certainly may be possible, particularly if only a few degrees.
Patent it, maybe?
How much good will these new cold climate window units do if their price is only competitive with professionally installed mini splits? Why should the price ever become competitive with existing >40°F window heat pumps, already considerably more expensive than an AC and a space heater, if government programs will throw >$3000 per unit at fairly small 9000btu units.
I'm using captions to try to spell the manufacturer for the three. But the captions are phonetic, not correct.
Gree and Midea? And Gradiant?
Would be nice if you spelled them. Or ensure captions are correct.
I'm trying to locate a window unit like Gree for my small house, but no luck.
On Google, at least.
I rewatched video and see they are not yet on the market.
I'm in Pacific Gas and Electric territory.
Humboldt County California.
Snowing today.
Our electric rates have gone through the ceiling.
All electric, mountain house, without gas mains. No option for gas.
I'll follow your channel for updates on micro heat pumps.
Please post videos as you learn more.
6,000 btu. 120 volt preferred.
Maybe saddle type is more available?
Hello - the manufacturers I think you are referring to are LG, Frigidaire, Whynter, Midea and Gradient. Gradient makes the saddlebag version and Midea is also working on a saddlebag model. Cold climate versions of these units are not available yet, but the ones on the market now will work down to about 40 degrees outside temperature. Gradient will probably be the first to release a saddlebag version that will work down to sub freezing temperatures. www.gradientcomfort.com/
Here is the fact sheet that we referred to on the webinar with model names and numbers - this does not include the Gradient product - only the portable heat pumps on wheels.
static1.squarespace.com/static/5bb2379dca525b5810509ec1/t/64274541529ec679daf107ca/1680295233936/Portable+Heat+Pumps.pdf