cmui

19 ms·

61.
by cmui 4y ago
I hear your concerns! Just want to reiterate (since this is one of the top comments) no internet connectivity is required to operate the system. We will have integrations that also allow you to change the setpoint with your home system of c
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by cmui 4y ago
Yeah, good question. The system is not meant to be DIY. The same contractor that does install also offers service. Logistics for replacement parts is important we will have quick, easy access for contractors.
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by cmui 4y ago
I like the out of the box thinking! Unfortunately I think this one doesn't quite pass first principles. Any pumping action from the vehicles would be extra work they have to perform, so you just shuffle the energy expenditure from your
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by cmui 4y ago
A few options for you, if you have a viable mounting situation for the condenser (big if), you can use an Electric Air unit with wall unit. Otherwise you're best off with a drop in heat pump PTAC, or a heat pump window unit like Gradie
65.
by cmui 4y ago
Good questions. We have a way of running HEPA with not unreasonable pressure loss, and then dialing back the amount of filtration when PM2.5 levels are reasonable. Separately a homeowner can request a high filtration mode. Humidifying is t
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by cmui 4y ago
You're right about switching everything over all at once. That would be a big step change in grid load! But large scale heat pump adoption is going to take a decade or more, and in the meantime we can work to build out the grid, and al
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by cmui 4y ago
Thanks for the feedback! If you feel ok saying, how much was the quote for this install? Do you place any value in indoor air quality?
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by cmui 4y ago
Definitely agree that a good customer experience is key here. We're not shipping half baked hardware to end customers. That's what engineering development (alpha build, design validation build, production validation build, home pi
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by cmui 4y ago
You got it. A brief technical aside, heat pump performance is hurt by frosting, which happens at intermediate outdoor temps (~35-50F). Basically the outdoor coil is both below freezing, and below the dewpoint of the air. The frost forms a t
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by cmui 4y ago
Talking about capacity for heat pumps is tricky, their available heating power changes continuously as a function of outdoor temperature. The convention is to refer to the available capacity at 47F for 'normal' heat pump and the c
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by cmui 4y ago
Gradient is a great product, uses 120V, great for small spaces, like apartments in NYC. https://www.protocol.com/climate/gradient-nycha-heat-pumps-q... . Electric Air is really targeted at replacing natural gas furnaces
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by cmui 4y ago
How much ductwork are you having upgraded, also any electrical panel upgrades? There can be extra scope that drives up install cost.
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by cmui 4y ago
Thanks for the feedback! What was install like for you, any issues there? Do you have any comfort issues that you'd like to address, say a room to hot or cold?
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by cmui 4y ago
What regions have you done those heat pump installs in? There's a lot of regional variability. Thanks for the feedback!
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by cmui 4y ago
There are ways of working with local HVAC contractors that provides value to them and doesn't just undercut their current way of business. Electric Air can provide lead gen, tools to support install, improved payment terms on jobs.
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by cmui 4y ago
Thanks for the feedback! I'll take a look at those two products.
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by cmui 4y ago
Good questions. A heat pump is 3-5 more efficient than any fossil fuel furnace. Fossil fuel furnace is 70-96% efficient, heat pump is typically between 300-500% 'efficient'. COP varies depending on the outdoor conditions, but you
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by cmui 4y ago
Condenser can be typically ~25ft from the air handler. It would have to be outside, otherwise it would act as a refrigerator for the garage, and tank the efficiency of the system. System size - we're working on an online tool to get yo
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by cmui 4y ago
I'm sure there's some contractor unit that lets you see the live readout of compressor speed. As for Electric Air - we want to give visibility into system operation, what's the input electrical power, what's the output t
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by cmui 4y ago
Great point. You don't source from the same spot you source combustion air - you run a separate fresh air intake. This system has HEPA, fresh air intake and humidity control packaged/integrated together well. The fresh air wouldn&
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by cmui 4y ago
Similar to solar. We connect you with a contractor to do a site visit, provide final quote and ultimately do the install.
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by cmui 4y ago
Yeah, not a bad idea to place pricing (or a link to it) on the preorder page, in addition to main page.
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by cmui 4y ago
Thanks for the feedback. If you feel comfortable saying, what region are you in? I think where you might start running into friction is if you want a heat pump vs a furnace. There's a lot of variation between local markets in terms of
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by cmui 4y ago
Ground source is great! (if you can afford the install).
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by cmui 4y ago
Yes, making spare parts and service work is super important. We'll likely set up regional distribution points for spare parts so anything critical can be easily sent next day.
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by cmui 4y ago
A common misconception is that you can use your forced air furnace when the power is out - you can't because the blower relies on electricity to move air around. Your point on the cloud service is a good one, which is why cloud service
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by cmui 4y ago
If people have a preferred way of integrating their devices, like home assistant, I'd want to make that possible for people to do with Electric Air. Re the sizing question - this is a part of the site that needs improvement. 12kbtu is
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by cmui 4y ago
Heat pumps are really important for reducing fossil fuel use in homes, and we need better products. Scaling this sort of company has unique challenges, but it would be a net positive if more people build good products/services in this
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by cmui 4y ago
Great question - this will be R454B (GWP 467) vs R410A (GWP 2000) and R32 (GWP 675). GWP is global warming potential, the relative emission factor of a substance relative to CO2.
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by cmui 4y ago
In the process of building out a tool that allows you to do just that on the website. You need some basic info about the home + a recent energy bill to do this. You can also go more bottoms up where you have all the geometric/thermal +

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