341–350 of 809 posts
* Fan is noisy (but at least that noise is confined to the outside)
* During ice storms, it ices up and I have to jam a stick through the grate to knock off the ice around the components inside. (or the fan doesn't spin)
* Natural gas furnace backup (that comes when temps dip below freezing) heats the house considerably faster than the heat pump
Earlier quoted context omitted.
windchill as a concept can be applied to all evaporative cooling systems.
Heat pumps are not an evaporative system. You can't lower the temperature across a gradient lower than the fluid temperature, no matter how fast that fluid is moving. You can cool things down faster, but you can't go lower. So if it's 10F, a 5F heat pump will work equally well at 0mph wind and 30mph.
Please consider on-boarding to Home Assistant. Avoid proprietary protocols to communicate between sub-systems as much as possible. The system should be self contained from the start and must be able to function without a local network & internet. Do not require internet connectivity, a hub, or some intermediary solution if a third party system (such as Home Assistant) wants to communicate to the system. My biggest fe…
> The system should be self contained from the start and must be able to function without a local network & internet. Rural users often have limited or no access to Internet service, yet need technology like this to heat and cool their homes.
Some questions: What is the HEPA for? Is it on the fresh air intake or are you actually HEPA-filtering the recirculated air? If the latter, why not MERV 16? HEPA media is probably more expensive, and it definitely has much higher pressure loss, and there is no actual need for it outside of healthcare. How are you humidifying? Can you control the coil temperature in cooling mode and thus control the sensible/latent co…
I would like a standard air filter to be used. a lot of individuals don't require HEPA, but I do. I would like to be able to source my own filters from anywhere, and put them in. just like my current furnace. let people pick their level of air filtration they are comfortable with
Those are beautiful looking units. It's a cool idea to focus on giving something very pedestrian and utilitarian a nice cosmetic overhaul. I just replaced radiators with a heat pump install. I had a few questions about your units: What are "backup heating strips?" They're mentioned in passing when talking about cold weather, but I imagine there is some meat here. Also, even though many heat pumps work in cold weather…
How did you replace your radiators? Did you have to install ducts, or did you find a cost-effective way to have a heat pump heat the water for your radiator system? Good ways to upgrade homes that use radiators to use heat pump heating seems like a big gap in the market right now (though, not sure if this is just a market problem or a gap in the technology, since my understanding is that radiators need higher tempera…
Does it explain somewhere that I missed how the different size units translate to sq. ft.? I would think that would be a great way to convey which size might work for people, but I might be missing some other factor that doesn't allow for that conversion?
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 + air leakage properties of the home and the local weather, this is more involved.
Earlier quoted context omitted.
Would your company be willing to provide an open-source local-first websocket-based integration with https://www.home-assistant.io/ or use the new Matter + Thread standard to provide it for everyone? If that's available, this would be my top choice as I'm actively shopping for all-electric heat pumps
If I'm gonna invest in a heat pump for the long term, I don't want it committed to any software technology that may be obsolete in 10 years. I want it to use something so dead stupid simple that anything in 50 years can still operate it without a lot of work. The simplest example I can think of is MIME ( https://en.wikipedia.org/wiki/MIME ). It can be embedded in basically any transport type. It can encode anything y…
Earlier quoted context omitted.
Are you tied to the app?
Yes s/he is. Mitsubishi force you to use their Kumo Cloud controls, which are 1) expensive (a few kk) and 2) require cloud. Supposedly Mitsubishi is replacing Kumo with something else, but that just makes the problem worse.
I'm a former diamond certified Mitsubishi installer
> There’s a big push to end fossil fuel use in US homes by electrifying all end-uses If all end uses are electrified, where does that electricity come from if not fossil fuel in large part?
Solar and wind prices are extremely low and still dropping. They are already cheaper than other newly built options. Coal plants have been shutting down, natural gas is now way more expensive, nuclear can't build soon enough or cheap enough. The transition in generation is happening too.