Hitachi Window-Type Inverter Aircon Review (Compact)

Hitachi Window Type Inverter Aircon Review Featured Image

Since I did my Hitachi vs. Carrier Inverter Aircon post, some of you have been asking for a fuller review on the Hitachi Window Type Inverter Aircon.


The model we have is the RA10HVQ. The first one we bought was a couple of years ago, when this model was the only one available window type inverter aircon, and which can fit in our small “aircon hole” on the wall. I don’t know what it’s called, so let’s just call it the aircon hole.

It was recommended by a friend of my sis. The Hitachi replaced a 0.75HP LG aircon (that’s why we have a small aircon hole on the wall). The room it’s in is around 12-15 sqm. Fortunately, the compact Hitachi just fit our aircon hole exactly so we didn’t need to do any major installation work.

You can check this guide on what aircon to get depending on room size:

We bought the Hitachi for P26,000 at that time, and it came with a free stand fan. The stand fan brand is Union, it is nice and has a remote! It still works until now, so matibay naman. It’s not flimsy.

When the aircon was delivered, it came in a box and we were on our own when it comes to installing it. Fortunately, we were referred to this installer who did a better job compared to the previous installers we’ve had who would just shove foam around the aircon to seal the hole (bara-bara lang). More on that below.


I’m not going to go through the technical specs, because I’m not an expert at any of that. You can just google the technical specs. I’m going to review this as a user 🙂

This is what it looks like in front. The aircon is off, but you’ll still see the temperature. This is the temperature of the room, I guess.

Hitachi Window Type Inverter Aircon

You push the “door” at the top and bottom to open it. When you open it, you’ll see the filter / screen. Sorry about the dirty filter, I really need to clean it. You push up the handles and take this out and clean it with water and maybe some mild soap whenever it’s dirty. I like that the filter is easy to get to and easy to return.

Hitachi Window Type Inverter Aircon Filter

This is actually the first time that I am noticing the yellow foam on the left side. It’s not visible normally, but the camera angle picks it up.

The unit seems solid, although there is an area inside that is styro, but all the other stuff seems to be made of metal.

This is what it looks like outside. It’s a bit dirty, but this is real life 🙂 My uncle likes to put a strip of cloth on all our aircons to help the water drip down, and there’s a pail under it to collect the water that can be recycled for watering the garden, cleaning outdoor floors, etc…

Hitachi Window Type Inverter Aircon Back

Hitachi Window Type Inverter Aircon Side 2

Hitachi Window Type Inverter Aircon Side

It comes with a remote, but no remote holder, so we just put velcro.

Hitachi Window Type Inverter Aircon Remote

Hitachi Window Type Inverter Aircon Remote Velcro

Here are some pics of the installation (with sealant):

Hitachi Window Type Inverter Aircon Installation Sealant

Hitachi Window Type Inverter Aircon Installation Sealant


With the newer aircons, there’s no need to go to Fan mode first before going to cooling.

We usually set the temperature to 22 or 23 C to save on electricity. It takes a while for the aircon to cool the entire room, but I find that it depends on whether the aircon is clean or not. If it has just been cleaned, the aircon cools the room very fast. If the aircon is dirty, it takes a longer time. Make sure all the windows are closed and that any holes are sealed. Generally, it takes us 1-2 hours at night to reach temp (starting from 30 or 29 C to go down to 23 C).

To make the room colder faster, we turn on an electrical fan to help circulate the cold air. A less crowded room will cool faster, obviously, since there are less things to cool down. Also, reduce heat-generating items in the room to help it cool faster – turn off lights if you don’t need them, etc…

However, once the desired temp is reached, it’s pretty stable. Even if I set it at 23 C, by around 4am, I am very cold. The aircon thermostat says 23 C, but it feels like 16 C!

On really hot summer nights, I still turn on an electric fan to help make the room feel colder, although I feel that the problem is because the aircon is dirty and needs to be cleaned. I turn off the fan when it gets cold.

BUT, if I turn on the aircon, turn the lights off, leave the room, close the door, leave it alone, the room cools down faster. Like, if I start at 30 C, I come back around 20 mins later and the room is cool at 25 C. So if you want it to cool faster, you can do this.

Hitachi aircon #2 is kept at 25 C. It’s a nice and comfortable temperature, and whenever I enter that room it’s always nice and cool. This one is rarely turned off, so matibay naman, it’s almost 2 years old and it’s turned on 24/7. It just needs to be cleaned more often.


In terms of usage, we don’t have any problem with them. The remote control needs to be pointed at the aircon to work, that’s all. Our older LG aircon remote will work even if it’s pointed somewhere else.

The ac has a timer function up to 24 hours, you can adjust the temperature to what you like and the ac will work to reach that temp.

I usually just set it on Auto and on Auto Swing. We’ve never had any of them repaired, just cleaned.


It will have the typical window-type aircon noise, although it’s not as loud the older generation aircons. It sounds like air being sucked in or pushed out, a gentle whoosshhhhh. There shouldn’t be any rattling sounds. If you hear any high pitched sounds or rattling, have it checked or replaced if it’s still brand new.


When we got our first Hitachi inverter aircon, the effect on our Meralco bill was an almost 1/3 slash. Our electricity bill became 2/3 of what it used to be.

After we got our other inverter aircons, it became harder to estimate how much we saved, because knowing that they were cheaper to run, we tended to use them longer. Whereas before, we timed it to stop at 6 hours or 8 hours, this time, we let it go for up to 12 hours.

Even with the added usage and the increase in Meralco prices, our electricity bill remained lower than before we bought our first inverter aircon 2 years ago.

How much you save depends on how much you were using your non-inverter AC before you switch to inverter. But switching to inverter definitely, definitely was a big factor in reducing our electricity bill. If I had to guess, I would say maybe P2-3k savings per aircon per month.


The filter should be cleaned often, maybe once a week. At least once a month. It depends on how dusty your air is. Just take out the filter, gently clean it, then put it back.

When you remove the filter, you’ll see some metal fins, and if they look dirty, it’s time to have the aircon professionally cleaned. If you feel like the aircon is not performing as well as it used to, it’s probably time to have it cleaned, as well.

Ideally, the aircon should be cleaned often. A dirty aircon is very inefficient and uses up more electricity daw. We clean ours around every 3-6 months, but the other aircon gets dirty very quickly, so that should be cleaned every 2 months, ideally. However, sometimes it’s a bit of a hassle to call for a cleaning appointment, then wait at home during the cleaning process, and make bantay. The cleaning process takes around 30 mins to an hour per aircon. Try to have the aircons cleaned at the same appointment so it’s less hassle for everyone. Cleaning costs around P450-500 each for window type aircons. They usually give some discount if you clean more aircons.

You’ll need to provide an area where they can do the cleaning, like in the driveway, garage, etc… preferably somewhere near a faucet and where the dirty water can drain.

You can clean the aircon yourself if you know what you are doing and have a power washer. J cleans his aircon himself and I was shocked he could carry the whole aircon by himself. It’s easier daw to just do it himself than to schedule and wait  His aircon is a Hitachi just like this one, too. His old LG aircon died and he bought this Hitachi because of our experience with them na so far, no issues naman. His Hitachi aircon does not have any problems, as far as I know, and his electricity bill was also cut by a lot since he switched to inverter.


This post was not sponsored by Hitachi, sana it was  It just so happened that my sister’s friend recommended it to us, we tried it, and then refer refer and that’s how we all ended up with this aircon.


  • compact size can fit into smaller ac holes
  • durable (matibay naman), we’ve never had any of them repaired so far, even with constant daily use
  • it was the most affordable window-type inverter aircon at the time


  • if people are in the room and lights are on (LED), it takes 1-2 hours before it reaches desired temp; however, with no one in the room, lights turned off, it took less than 20 minutes to go from 30 C to 25 C
  • 1.0 HP is the lowest HP available, there’s no 0.75HP
  • no accessories included: no remote holder, brackets, etc…


For those asking about the installation, we got e-5 Air-Condition & Electronics Service Center, # 254-8361, 711-8506, 711-8987. They are located in Sta. Cruz, Manila. We ask for Daniel.

Mounting (salpak), P650
Brackets, around P450
Sealant, around P250
Any adjustments like making the hole size bigger, P250 (they have a grinder)

Those were the prices for our location, they might charge higher if you are located farther.

We don’t buy aircons that often, but when we do, they are the ones we get because their work is much more professional looking than the ones we got before na mukhang bara bara talaga and only use L-brackets.

Check that the aircon is angled slightly downward at the back, so that any water that condenses can drip down.

I hope you enjoyed this blog post. Please feel free to leave a comment below, I love hearing from you!

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25 thoughts on “Hitachi Window-Type Inverter Aircon Review (Compact)

  1. KC

    Hi! I would like to ask if you had a separate breaker for this aircon. I just bought mine and will have it installed soon so I am asking around if there is a need for a separate breaker. Thanks!

    1. Jon Frakes

      Yes, you need a dedicated line for your air conditioner (regardless of brand). Although the amperage of your breaker depends on the size of your unit, most electricians will allocate a 20 ampere breaker. This can support an aircon unit with load of around 3520 watts (or 80% of the line’s theoretical 4400 watts [20 amps x 220 volts = 4400 watts]). Your aircon should never be plugged-in to any of your standard household sockets because most of them are usually connected to a single 15 amp breaker. Doing so might overload the line if the total wattage of your aircon + other appliances sharing this line exceed 2640 watts (15 amps x 220 volts x 80%).

    2. Marvin

      Hi karen. Matagal ba talaga syang lumamig. bought 1hp inverter ac 3 days ago and its not cooling properly. set temp @ 18 deg after 8 hrs temp is still @ 23. room is about 12sqm only. What’s the problem kaya?

      1. KG

        It is most likely doing it’s job pero underpowered ang unit mo. Due to climate change ang 1HP ngayon nasa maximum 10-11sqm nalang talaga ang kaya, factor in yung ceiling height, sunlight, insulation and number of windows sa room as well as air leakage.

        You probably should have gone for a 1.5HP.

      2. Karen MNL Post author

        Agree with KG. It also depends if you have a lot of stuff in your room. More stuff, more things that the aircon needs to cool. Less stuff, less work for the aircon. For our Hitachi, we usually just set it at 23 and then use an electric fan. When the lights are off, especially around 2-4am, the room gets really cold using this method that I sometimes have to get an additional blanket.

        It’s cheaper to use a little “help” from the electric fan to circulate the air rather than to set the aircon at 18 and let the aircon use up a lot of energy to try to achieve 18 C, lagot sa Meralco bill.

        Our walls are cement and I think that helps make the room cooler because they retain the cold much longer.

  2. Shadia

    Might I ask where exactly did you buy the Hitachi aircon? We are looking for one, I have seen Lazada, Twin Marks, Abenson, etc. But I am looking for a seller that can be trusted with the Hitachi warranty. Or do you contact Hitachi directly in case there are broken parts? I am looking to change our aircon for twenty years, it has always been trusty but it is reaching the end stage of it’s life span. Our room needs 1.5 HP. Thanks in advance for the reply.

    1. Karen MNL Post author

      Hi, warranty is handled by Hitachi, I think. Have not had occasion to contact them, though. We bought ours from Welcome Appliances in Binondo because we were refered by a friend and they had the free stand fan promo at the time.

  3. Shadia

    Noted, thank you! Another question though if a Hitachi inverter turns off itself when the room is already cold, is there a way to change the setting or is it because of the type of aircon?

    1. Karen MNL Post author

      Hi Shadia, it doesn’t turn itself off talaga. It’s still on. It just stops using more power because it doesn’t need to anymore. It just uses the minimim power just to maintain the ideal temperature. That’s how it works. You can set the ideal temperature. If you want it really cold, you can set it to the lowest temp, can’t remember if it’s until 18 C or can go lower. I’ll check tonight.

    2. Karen MNL Post author

      Each degree lower uses more electricity. So to save electricity, you can set it to something like 25 C and then just help circulate the cold air with an electric fan. That will save more electricity than setting the temp to 18 C.

  4. Jon Frakes

    Hi Karen, nice review :).

    I recently had my Carrier 2HP Window Inverter refunded by Abenson (and after directly contacting Concepcion-Carrier) after around 10 months of use and opted for the 2HP variant of their Hitachi Window Inverter (RA-20HV). It also came with two free cleaning appointments for the first year. Installation was made by e-5 Air-Condition & Electronics Service Center and I’m very satisfied with their workmanship. They had to increase the window size to accommodate Hitachi’s dimensions. P650 for installation, P750 for enlarging the window hole, and P200 for the sealant. Total service fee is P1600.

    I’m very satisfied with how it looks compared to Concepcion-Carrier’s cheap-looking frame. It also runs quietly especially once the set temperature has been reached. I also noticed that the unit has two separate fans – one each for the front and back, so that may be the reason why it sounds less audible.

    My overall impression is that It’s a solid unit. So far, so good.

  5. Jennifer

    Hi, Karen. Just want to ask something. I bought my Hitachi window ac three weeks ago and I have a strange feeling… if there is something wrong with my ac. Is it normal kung walang nalabas sa tubig from the outside tube? Thank you.

    1. Karen MNL Post author

      Hi Jennifer, normally may water na lumalabas at the back of the ac because of condensation. Check mo baka mali yung angle ng pag install ng ac kaya di nagfloflow down yung tubig.

      1. Noel

        Ganyan din yung sakin and I bought it more than 2 years ago. .8HP yung sakin and medyo kulang nga yung angle ng pagkakainstall. Di naman daw major issue sabi ng mga tech saka ng authorized tech ng Hitachi. Nung bago wala talagang lumalabas na tubig pero after a couple of months okay na. Sobrang lakas at lamig so naka set lang kami sa 25. I work sa gabi so morning ang gamit ko.

        Napansin ko lang after several cleaning jobs is nagiba na ang performance. Di na ganun kalamig at di na din naglalabas ng water. Tinatanong ko naman cleaning crews sabi nila di pa naman kelangan recharge and free-on.

        Now the problem is nung 1 gabi lang bago ako gumising is namatay siyang mag-isa. Akala ko power surge lang kaya pinabayaan ko na. Then kaninang umaga after an hour of sleep namatay nanaman kaya nagising ako, I turned it on but after a couple of minutes namatay nanaman and nafiflicker na yung front panel kaya hinugot ko na. We tried it one more time pero ganun pa din. I called the tech na huling naglinis so hopefully maayos naman later.

        Ito lang din ang available na window type AC at that time kaya ito nakuha ko. Sobrang happy kami sa performance until now. Ang hirap lang magpaschedule ng appointment sa authorized Hitachi service centers. We live in Rizal so Marikina yung nirecommend samin. Anung araw pa lang ngayon and next week pa daw available. Too bad.

        1. Karen MNL Post author

          Mahirap talaga mag schedule kasi first, tatawag ka sa Hitachi, then si Hitachi tatawag pa sa mga authorized service center maghahanap pa ng available… pag napansin mo maayos naman yung trabaho nung technician, hingin mo number niya para next time, text mo na siya diretso 🙂 Baka may discount pa 🙂

          Anyway, pag dumating na yung technician to fix yung namamatay na aircon, make sure alamin mo kung ano yun naging problem – may nagkamali ba sa cleaning kaya nasira? Mali ba pagkabit? Para next time alam mo na so you can avoid the issue. Pls share din dito kung anong update. Thank you 🙂

  6. KGorriceta

    Got my Hitachi Ra-10HVQ (compact model)replaced exactly a month and a half ago which replaced my Carrier Optima 1HP which cools really well but is insanely LOUD and VERY CHEAP build.

    Meralco bill usually sits around the 4XXX peso mark, a month before I got the Hitachi my bill was 4390 pesos usage ko was 10-14 hours a day temp set at level 5 out of 9 (cool enough), this month (June) my Meralco bill went down to just 4190.87 pesos with the temperature set usually around 23-24 at night and 25 celsius at daytime—the unit is on almost 24/7 rarely turned off unless kakain ako or may lakad sa labas.

    Considering the extended use and my consumption still went down, I’m pretty happy. Yung level of comfort kasi it’s very quiet and constant yung temperature is well worth the price I paid for it.

    Still contempating whether to get the full sized unit for our new house (1HP and another 1.5HP) or to go full blast and splurge on a Daikin D Smart series of the same cooling power for the other two rooms. Worry ko kasi maintenance cost pagpapalinis twice a year.

    Already bought a Daikin D Smart 3HP for our living/dining area but since di pa natatapos bahay di pa na iinstall so I can’t comment on it however we have two 1.5HP installed sa living/dining area sa home sa province. It is VERY COLD and we rarely turned on the second unit so performance wise Daikin but I’ve noticed that he outdoor units are not that quiet.

    I guess I shouldn’t mind it that much, worry ko lang mag reklamo kapitbahay kasi lilipatan namin na bahay medyo magkakalapit mga houses lalo pa at very particular ako sa noise.


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