cmui

13 ms·

91.
by cmui 4y ago
Thanks for the support! Vapor injection is cool - if that's interesting look at some other novel architectures like cascade cycles, hot gas bypass, and internal heat exchangers.
92.
by cmui 4y ago
Other replies have great points. A few of my own (1) Proper install is really important, we're building a software tool to make sizing heat pumps and qualifying ducts easier (2) Having a dedicated smart thermostat means that back up he
93.
by cmui 4y ago
I get where you're coming from. There's a lot of scope to this though, and not a lot of technical risk. I think in this case it makes sense to sell units, and also generate feedback about the product as early as possible. We'
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by cmui 4y ago
We're primarily targeting remodel/retrofits as a market, but you could certainly use this in a new build.
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by cmui 4y ago
My hats off to you for doing a DIY install. This is not a bad route to go if you enjoy/feel comfortable doing the work and don't care about air quality, smart thermostat integration, etc. Re contractors, we will have local contrac
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by cmui 4y ago
There are some combined space heating + water heating heat pump options out there. A few points to watch out for (1) install of an extra hydronic loop for the air handler can be expensive (2) your air handler + heatpump combination will not
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by cmui 4y ago
Thanks for the feedback! I'll send you a note.
98.
by cmui 4y ago
This behavior is how current variable speed heat pumps operate with Ecobee and Nest. You leave efficiency on the table, but I get it provides some future proofing assurance for homeowners. Definitely something we can integrate into the boar
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by cmui 4y ago
It's something we'd definitely consider. Is the desire to have thermostat control via any third party? edit - The current plan has been Matter/thread Homekit + Google Home integration. We can expose at least temperature contr
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by cmui 4y ago
A few major improvements - (1) Purchasing experience, we'll connect you with a local contractor, arrange financing and help with rebates. (2) HEPA filtration, fresh air intake and humidity control fully integrated into the system, actu
101.
by cmui 4y ago
Fair point, I should do a better job of communicating the unit sizes. Heat pump capacity varies as a function of outdoor temps. A standard unit is rated at 47F but the sizes I'm showing are at 5F (cold climate conditions). Also for thi
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by cmui 4y ago
I understand the concern around lock in. There is a technical hurdle to optimized thermostat <--> variable speed heat pump interop. You have to turn the temperature error between setpoint and actual temperature into a compressor speed
103.
by cmui 4y ago
I totally get this concern. Any good piece of critical home infrastructure should be able to operate without the cloud or an internet connection. Following this logic the thermostat + heat pump combination can operate fine without the cloud
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by cmui 4y ago
What I've observed is that getting a heat pump turns into a real science fair project for homeowners, and forget trying to integrate air quality in a good way. The proprietary communicating thermostats that come with heat pumps are rea
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by cmui 4y ago
We will have standard home integrations (Google Home, Apple Homekit, likely implemented via Matter standard). Using those you can set temperature easily, however to have deeper insight into system state, energy use, air quality, you'd
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by cmui 4y ago
That's a great point. Our initial market will be North America where this makes the most sense. For people with radiators, you could also do an install with our wall unit. If you have a radiator + boiler system there are also a lot of
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Launch HN: Electric Air (YC W23) – Heat pump sold directly to homeowners
927 points by cmui 4y ago|789 comments