CasaSmart guide
BTU sizing for the room, brand selection with local integration (Mitsubishi, Daikin, Toshiba), Moldova installation.
CasaSmart
A “smart” air conditioner doesn't have to be an expensive unit with factory Wi-Fi. In reality you have two routes to the same result: either you buy an AC that already ships with a native Wi-Fi module and its own app, or you take an ordinary, reliable unit and make it “smart” with a Zigbee or Wi-Fi infrared transmitter (an IR blaster). Both work, but they suit different situations, and the right choice depends on the room, your budget, and how deeply you want to integrate climate into the rest of the home.
Being “smart” means concrete things: turning the unit on and off from your phone, scheduling temperatures by hour and day, tying the climate to your presence at home and to sensors, and controlling it by voice or from a single panel alongside lights, sockets and blinds. The comfort comes from thoughtful automations, not just the button on screen: a warm room when you arrive, automatic shut-off when a window opens, an eco mode at night.
At CasaSmart we treat climate as a turnkey integrator: we start from what you already have or from your budget, pick the right solution — a native unit or an IR retrofit — and wire it correctly into your home, locally, without necessarily depending on the cloud. In this guide we walk through the important decisions step by step, so you choose a smart air conditioner that genuinely makes life simpler.
TL;DR
There are two routes to smart climate: a unit with native Wi-Fi, or an ordinary AC made “smart” with an IR blaster (Zigbee/Wi-Fi). Choose an inverter for daily use, size it by room (rule of thumb ~100 W/m²), integrate everything locally in Home Assistant, and add presence and scheduling automations. CasaSmart helps you choose, size, install and integrate — without overclaiming.
Step 1
The first thing to clarify is how your unit becomes “smart”. A native-smart air conditioner has a factory Wi-Fi module and the manufacturer's own app — it sets up fast, but ties you to that brand's app and cloud. The second route is a retrofit with an infrared transmitter (an IR blaster): a small Zigbee or Wi-Fi device that mimics the remote and commands any ordinary IR unit. The advantage of the retrofit is freedom — you make even an old unit “smart” without changing anything on it. Its limit is that IR is one-directional: the unit doesn't report its real state back, so the device assumes what it sent. Brands like MOES, Aqara or Sonoff we integrate; we are not their official distributor, but they work well in the homes we configure. The choice depends on your budget and your existing unit.
Step 2
Whether you go native or retrofit, the compressor technology matters. An on/off unit starts at full power, reaches the temperature, shuts off completely, then restarts — cycles that cause temperature swings and a less even consumption. An inverter unit continuously modulates compressor power: it reaches the target temperature and then holds it finely, running more smoothly and quietly. For a home where the climate runs for hours and where you want automations like “keep 23 degrees”, an inverter behaves more predictably and pleasantly. On the smart side, an inverter responds better to small adjustments sent by automations, without the abrupt starts of an on/off. We won't promise exact savings figures — they depend on insulation, room and habits — but as a rule, for sustained daily use, the inverter is what we recommend.
Step 3
A unit that's too small won't cool; one that's too big switches on and off too often, dehumidifies poorly and wears out the compressor. So sizing matters more than the smart features. A common rule of thumb starts from roughly 100 W of cooling capacity for every square metre of room, adjusted upward for spaces with lots of sun, large windows, a top floor or a kitchen. It's only a starting point, not an exact calculation: ceiling height, window orientation and insulation all change the result. Don't invent numbers and don't trust the “works for 30 metres” on the box. For a correct choice, measure the room and tell us its specifics. At CasaSmart we do the sizing together with you, so the chosen unit — native or retrofit-ready — is the right size, not just smart.
Step 4
If you go the retrofit route, the IR blaster must be placed with a direct line of sight to the unit, with no furniture or curtains blocking the signal; its range is limited, like a remote's. Zigbee models need a Zigbee hub and join your local network; Wi-Fi models connect straight to the router but load the network and more often depend on the maker's cloud. After pairing, you pick your unit's brand in the app and load the correct remote profile — this is the critical step, because a wrong profile sends mismatched commands. We recommend testing every function: power on, off, mode, temperature, fan speed. Brands like MOES we integrate often; we are not their official distributor, but configured correctly they are a cheap, reliable way to make an existing unit “smart”, especially when later tied into a local system.
Step 5
Real comfort appears when the climate no longer lives in a separate app but in a single system. Home Assistant is the local platform we use to bring native-smart units and IR blasters together, regardless of brand. Through a mature integration or a community integration, the unit appears as a “climate” entity, with temperature, mode and fan controllable from one place, alongside lights, sockets and sensors. From there we build real automations: turn on based on a temperature sensor, turn off when a window contact opens, switch to eco mode at night. Because Home Assistant runs locally, commands still work when the internet is down, and your data stays at home. Not every integration is perfect — some units report only partially — but in practice it is the most flexible foundation for a genuinely intelligent climate.
Step 6
A well-tuned smart climate works on its own. The simplest tier is scheduling by the hour: cool before you wake, shut off when you leave for work, a gentle start before you get home. The next tier is presence: tied to motion sensors or your phones' location, the climate turns on only when someone is home and shifts to eco mode or off when the house is empty. Add a window sensor and the automation switches the unit off while you air the room, so you don't cool the street. A night mode can raise the temperature slightly and lower the fan for calm sleep and less consumption. All of this works on both native units and IR retrofits — the only difference is how finely the unit reports its state. The goal isn't to press a button, but to stop pressing any.
Step 7
A smart unit still depends on cleanliness. Clogged filters cut airflow, reduce efficiency and worsen air quality, so they must be cleaned regularly — on some native models the app or an automation can remind you after a set number of running hours. The outdoor unit needs clear space and a periodic check, and a short service at the start of the season prevents surprises. Beyond cooling, most units dehumidify: in a dedicated mode the unit pulls moisture from the air without over-cooling, useful on humid shoulder-season days. You can even tie the dehumidifying to a humidity sensor, so it starts automatically above a threshold. Good maintenance extends the compressor's life and keeps consumption predictable; no automation makes up for a dirty filter. At CasaSmart we build these routines into the initial setup, so the system reminds you on its own.
Step 8
The best unit choice can be undone by a poor installation. The indoor unit's position, the length and slope of the refrigerant line, condensate drainage and proper vacuuming of the system all directly affect performance and lifespan. The electrical work must be done safely, and the IR blaster or Wi-Fi module placed so it communicates reliably. This is where we step in as a turnkey integrator: we help you choose between a native-smart unit and an IR retrofit, size it correctly, integrate the climate locally into Home Assistant alongside the rest of the home, and build the presence, scheduling and eco automations. The initial consultation is free; the technical visit and detailed design are paid services, because they take time and responsibility. We work locally, with the brands we distribute officially and those we only integrate, chosen to fit what suits you.
Common mistakes: choosing the unit only by its smart features and ignoring sizing; buying an oversized model that switches on and off too often and dehumidifies poorly; relying entirely on the maker's cloud and losing control when the internet drops; hiding the IR blaster behind furniture; and forgetting the filters, assuming an automation makes up for a dirty unit. All of these are avoided with a little planning.
Yes. A Zigbee or Wi-Fi infrared transmitter (an IR blaster) mimics the remote and controls most IR units without changing anything on the unit. You only need a direct line of sight to it and the correct remote profile in the app. The limit is that IR doesn't read the unit's real state, but for scheduling and remote power-on it works very well.
For sustained daily use we recommend an inverter. It modulates power and holds the temperature finely, runs quieter and responds better to the small adjustments automations send, without the abrupt starts of an on/off. We won't promise exact savings figures, since they depend on insulation, room and habits, but the behaviour is more predictable and pleasant over the long run.
The brand's app controls a single unit and depends on the cloud. Home Assistant runs locally and gathers the climate, lights, sockets and sensors into one system, with real presence and scheduling automations. Commands still work when the internet is down, and your data stays with you. We use a mature integration or a community integration depending on the unit.
We start from a rule of thumb of roughly 100 W of cooling capacity per square metre, adjusted for sun, large windows, a top floor or a kitchen. It is not an exact calculation: ceiling height and insulation change the result. That's why we measure the room together and choose a unit that's the right capacity, not just rich in smart features.
We are a turnkey integrator: we help you choose the unit, size it, integrate it locally into Home Assistant and build the automations. We work with brands we distribute officially and others we only integrate, chosen to fit your need. The initial consultation is free; the technical visit and detailed design are paid services.
● CasaSmart · Chișinău
CasaSmart can configure the Home Assistant automation and test it on real devices.