Construction Menu | About the Cost of Air Conditioner Replacement Work
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推奨ページタイトル：エアコン交換工事の費用・施工手順｜横浜市青葉区の翔工務店
推奨スラッグ：service-menu-air-conditioner-replacement
テーマ：JIN 8.3 対応（共通CSS kakeru-menu.css を使用）
■運用方法（共通CSSに統一）
1. CSSは共通クラス .kakeru-menu にまとめ、プラグイン「Custom CSS & JS」へ kakeru-menu.css を1つだけ登録済み。
2. 本文（コードエディター）には
のHTMLだけを貼る（
は貼らない）。
3. 抜粋・AIOSEOメタディスクリプションは自動生成に任せず手入力する。
※このファイルはプレビュー確認用に 共通CSS と 本文HTML を1つにまとめた自己完結版です。
※画像はリネーム前提のURL（ビフォーアフター-1.png／施工前-2.png／1-2.png／2-2.png／3-3.png／4-1.png）を使用。STEP4（室外機・真空引き）だけ写真が無く「★画像URL」コメントを残しています（無くても崩れません）。
■今回の追加（2026-09-08）
・「エアコン交換で使える補助金・助成金」セクションを新設（費用の後・施工実績の前）
エアコンは国の住宅省エネ補助金（給湯省エネ等）の対象外のため、東京都ゼロエミポイントと自治体の省エネ家電補助を案内。会社の申請対応は未確認のため断定しない表現。
・細かな整え：施工実績カード内の不要な
を除去、画像altを補足
–>
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Kakeru Koumuten Co., Ltd.!
We handle not only single-family homes but also rental properties such as apartments and condominiums.
Feel free to consult us about any air conditioning issues like “not cooling or heating,” “strange noises or leaks,” “high electricity bills,” or “having used it for over 10 years.”
From 80,000 yen
Approximately 2 to 3 hours to complete
Completely free
Cost of Air Conditioner Replacement Construction
This is a standard estimate for replacement construction, including the air conditioner unit (indoor and outdoor units), removal of the existing air conditioner, installation of the new air conditioner (standard construction), piping connection, vacuuming, trial operation, and recycling disposal of the existing unit.
The cost may vary depending on the size of the room (number of tatami mats), the grade of the unit (energy-saving performance, automatic cleaning function, etc.), the length of the piping, the installation method of the outdoor unit, and the presence of a dedicated outlet.
Estimated Costs by Room Size
This is suitable for rooms around 6 tatami mats, such as children’s rooms, bedrooms, and studies. It can be used with a standard 100V outlet and is the most common size, making it easy to keep costs down.
Major Manufacturers (Products)
Daikin “E Series” / Mitsubishi Electric “Kirigamine GE Series”
This is suitable for洋室 or dining rooms of 8 to 10 tatami mats. Like the 6-tatami mat model, it can be used with a 100V outlet and is chosen when more capacity is desired for the room size.
Major Manufacturers (Products)
Panasonic “Eolia F Series” / Hitachi “Shirokuma-kun AJ Series”
This is suitable for living rooms or LDKs of 12 to 14 tatami mats. Models typically use 200V, and a voltage switch for the dedicated outlet may be necessary. There are many products available with automatic cleaning and energy-saving features.
Major Manufacturers (Products)
Daikin “Urusara X” / Mitsubishi Electric “Kirigamine Z Series”
This is a large-capacity type suitable for spacious LDKs and rooms with high ceilings. It is dedicated to 200V, and since the outdoor unit will also be large, it is necessary to check the installation space. There will be a higher proportion of high-grade models.
Major manufacturers (products)
Panasonic “Eolia X Series” / Hitachi “Shirokuma-kun X Series”
* The cost is an estimate “per unit.” If multiple units are replaced at the same time, we will provide a quote based on the number of units.
* Standard installation assumes piping within 4m, the outdoor unit placed on the ground or balcony, and the ability to use existing piping holes and dedicated outlets.
* If a new dedicated circuit, voltage switch from 100V to 200V, or changes to outlet shape are necessary, additional electrical work costs will apply.
* Extensions of piping, wall or roof placement of the outdoor unit, two-tier placement, installation of decorative covers, and handling of concealed piping (if piping runs through the wall) will be quoted separately.
* Disposal of existing air conditioners incurs additional costs for recycling fees and collection and transportation fees.
* In the case of apartments, the installation location and construction hours for the outdoor unit may be specified by management regulations.
If you send us photos of your current air conditioner’s indoor unit, outdoor unit, and outlet, along with the room size and model number (listed on the side of the indoor unit), we may be able to provide an estimated quote.
Request an estimated quote using photos and drawings
Subsidies and Grants Available for Air Conditioner Replacement
Replacing air conditioners (room air conditioners) is not eligible for national housing energy-saving subsidies like water heaters or windows, but depending on your local municipality, there may be subsidy programs available for replacing energy-efficient appliances. Here are some representative programs as of 2026.
This program provides points (such as gift certificates) when installing energy-efficient air conditioners in residential homes in the city. The following are the estimates for replacements.
- Under 2.4kW (for about 6 tatami mats): 9,000 yen
- 2.4 to 3.6kW (for about 8 to 12 tatami mats): 10,000 yen
- Over 3.6kW (for more than 14 tatami mats): 23,000 yen
- Replacing air conditioners used for over 15 years increases the amount (up to 70,000 yen)
* This is for residents of Tokyo, and the condition is to purchase a new energy-efficient model from a registered retailer (applications are accepted until the end of March in the 9th year of Reiwa / details may change).
In Kanagawa Prefecture, there may be subsidies for replacing energy-efficient appliances depending on the municipality (for example, Minamiashigara City offers up to 10,000 yen per air conditioner). The implementation status and amounts in areas such as Yokohama City and Kawasaki City vary by fiscal year. There may also be grants available for heatstroke measures targeting elderly households.
※Subsidies and grants may vary based on the fiscal year, budget, your residential area, and eligible products, and they may end even within the application period once the budget is reached.
※There are systems that require purchases from specific retailers. We will provide information on eligibility and application methods as much as possible during the on-site survey and estimate.
View detailed information on renovation subsidies and grants
Track Record of Air Conditioner Replacement Work
We replaced the living room air conditioner that had been in use for over 15 years and was showing signs of yellowing and poor cooling. We utilized the existing piping holes and dedicated outlet, replacing the piping with new ones. The room’s impression brightened, and both the heating/cooling efficiency and electricity costs improved.
See more of Kakeru Koumuten’s construction achievements
When to Replace Your Air Conditioner
The timing for replacing an air conditioner depends on usage frequency and maintenance conditions, but a general guideline is around 10 to 15 years.
Manufacturers typically keep parts for about 10 years after production ends, so after 10 years, it may be difficult to obtain repair parts, making repairs impossible. Additionally, models over 10 years old often consume more power compared to newer models, and replacing them can lead to reduced electricity costs.
If you notice any of the following symptoms, please consider repair or replacement.
- It doesn’t cool or heat even when set to the desired temperature; the efficiency has weakened.
- Water is dripping from the indoor unit, and there are sounds of dripping.
- There are unusual noises like rattling or squeaking during operation.
- There is a musty or sour smell (indicating internal dirt that cannot be removed).
- The power won’t turn on, it stops unexpectedly, or the remote control is unresponsive.
- Electricity costs have clearly increased compared to before.
Some symptoms can be improved with simple maintenance, such as cleaning the filter, replacing remote control batteries, or clearing clogged drain hoses. If the air conditioner is relatively new, repairs may be more cost-effective, and we will provide suggestions during the on-site survey.
If issues arise shortly after installation, you may be eligible for manufacturer or contractor warranties. Before requesting paid repairs or replacements, we recommend checking the warranty and consulting the contractor or manufacturer who installed it.
If you leave water leakage from the indoor unit unattended, it can lead to stains and mold on wallpaper and flooring, as well as leaks to the lower floors. If you notice any abnormalities, please consider inspection or replacement as soon as possible.
If you want to know the cost of air conditioner replacement
If you send us a photo and model number, we may be able to provide an estimated quote.
How to Choose an Air Conditioner
When selecting an air conditioner, it is most important to choose one with the appropriate capacity (kW, compatible tatami mats) for the size of your room. If the capacity is insufficient, it will run continuously, increasing electricity costs and shortening its lifespan. The required capacity also varies depending on whether the building is wooden or reinforced concrete, as well as sunlight exposure and the presence of atriums. If you are unsure, we can provide suggestions through an on-site survey.
Recently, many products come equipped with features that enhance comfort and reduce maintenance efforts, such as:
- “Automatic cleaning function” that cleans the filter automatically
- “Internal clean function” that dries and disinfects the interior after operation to prevent mold
- “Sensor function” that detects human position and sunlight to adjust airflow direction and volume
- “Wi-Fi and smartphone connectivity” that allows operation from your smartphone while you are out
- High energy-saving performance that reduces electricity costs (energy-saving standard achievement rate, APF)
- Models with “cold climate specifications” and humidifying functions for those prioritizing heating
Points to Note for Air Conditioner Replacement Work
An air conditioner requires a dedicated circuit outlet. For models suitable for 14 tatami mats or more, 200V models are common. If you currently only have a 100V outlet, you will need to switch the voltage at the distribution board and replace the outlet. If there is no dedicated circuit, wiring work from the distribution board will be necessary.
Existing piping is often unusable due to deterioration or differences in refrigerant types, so it is generally replaced with new piping. If the piping is concealed within the wall, the compatible models are limited. The outdoor unit must be installed in a location that allows for good airflow and easy inspection and repair.
The new indoor unit may be larger than the existing one, and if there is not enough space between the unit and the ceiling or walls, installation may not be possible. Additionally, after removal, there may be sunburn marks or dirt exposed on the wallpaper. If you plan to replace the wallpaper at the same time, it can be done while the air conditioner is removed, resulting in a clean finish.
It is recommended to replace multiple units or carry out interior work “simultaneously”
Replacing multiple air conditioners at the same time can consolidate travel costs and collection and transportation fees for existing units, reducing the cost per unit. If you are considering wallpaper replacement or exterior wall painting, coordinating the timing with the removal of the air conditioner and piping cover can save on detachment costs and ensure a neat finish.
Which air conditioner is suitable for your home?
We will check the size of the room, outlets, piping, and outdoor unit placement during the on-site survey.
Air Conditioner Replacement Work Procedure
The air conditioner replacement work is completed in about 2 to 3 hours per unit (about half a day if electrical work is involved). On the day of the work, please move some furniture under the indoor unit, and we will perform the work after protecting the floor and walls.
Before the work, the air conditioner showed noticeable yellowing and had weak cooling and heating.
We check the room size, the model number of the existing air conditioner, the shape and voltage of the outlet, the position of the piping hole, and the installation location of the outdoor unit. Based on your desired features and budget, we will propose a model that fits your room.
After performing a pump-down (the process of recovering refrigerant gas to the outdoor unit), we remove the outdoor unit, piping, and indoor unit in that order. To prevent refrigerant gas from being released into the atmosphere, we will handle it properly and recycle the existing unit.
We check the wall’s structure and securely fix the mounting plate while ensuring it is level. We pass the new piping, drain hose, and electrical wires through the piping hole, and hang the indoor unit on the mounting plate. We seal around the piping hole with putty to prevent rainwater and insects from entering.
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We will install the outdoor unit and connect the piping with flare processing. After performing “vacuuming” to remove air and moisture from the piping using a vacuum pump, we will release the refrigerant. Skipping this step can lead to reduced performance and malfunctions, so we take the time to ensure it is done correctly.
We will conduct trial operations for cooling and heating to ensure that it cools and heats properly, check if water is being drained from the drain, and confirm that there are no gas leaks or unusual noises. We will provide instructions on operating the remote control and maintenance, completing the replacement.
Service Areas
Based in Aoba-ku, Yokohama, we primarily serve Kanagawa Prefecture and Tokyo. We can also accommodate some areas in Chiba Prefecture and Saitama Prefecture, so please feel free to consult with us.
View service areas in Tokyo
Akishima City / Akiruno City / Adachi Ward / Arakawa Ward / Itabashi Ward / Inagi City / Edogawa Ward / Ome City / Ota Ward / Katsushika Ward / Kita Ward / Kiyose City / Kunitachi City / Koto Ward / Koganei City / Kokubunji City / Kodaira City / Komae City / Shinagawa Ward / Shibuya Ward / Shinjuku Ward / Suginami Ward / Sumida Ward / Setagaya Ward / Taito Ward / Tachikawa City / Tama City / Chuo Ward / Chofu City / Chiyoda Ward / Toshima Ward / Nakano Ward / Okutama Town / Nishi-Tokyo City / Nerima Ward / Hachioji City / Hamura City / Higashi-Kurume City / Higashimurayama City / Higashiyamato City / Hino City / Fuchu City / Fussa City / Bunkyo Ward / Machida City / Mitaka City / Minato Ward / Musashimurayama City / Musashino City / Meguro Ward
View service areas in Kanagawa Prefecture
Aikou-gun Aikawa Town / Ashigarakami-gun Oi Town / Ashigarakami-gun Kaisei Town / Ashigarakami-gun Nakai Town / Ashigarakami-gun Matsuda Town / Ashigarakami-gun Yamato Town / Ashigarashimo-gun Hakone Town / Ashigarashimo-gun Manazuru Town / Ashigarashimo-gun Yugawara Town / Isehara City / Odawara City / Kamakura City / Kawasaki City / Kawasaki City Kawasaki Ward / Kawasaki City Asao Ward / Kawasaki City Saiwai Ward / Kawasaki City Takatsu Ward / Kawasaki City Tama Ward / Kawasaki City Nakahara Ward / Kawasaki City Miyamae Ward / Koza-gun Samukawa Town / Zushi City / Chigasaki City / Nakagun Oiso Town / Nakagun Ninomiya Town / Hadano City / Hiratsuka City / Fujisawa City / Miura-gun Hayama Town / Miura City / Minamiashigara City / Yokosuka City / Yokohama City / Yokohama City Aoba Ward / Yokohama City Asahi Ward / Yokohama City Izumi Ward / Yokohama City Isogo Ward / Yokohama City Kanagawa Ward / Yokohama City Kanazawa Ward / Yokohama City Konan Ward / Yokohama City Kohoku Ward / Yokohama City Sakae Ward / Yokohama City Seya Ward / Yokohama City Tsuzuki Ward / Yokohama City Tsurumi Ward / Yokohama City Totsuka Ward / Yokohama City Naka Ward / Yokohama City Nishi Ward / Yokohama City Hodogaya Ward / Yokohama City Midori Ward / Yokohama City Minami Ward / Sagamihara City / Sagamihara City Midori Ward / Sagamihara City Minami Ward / Sagamihara City Chuo Ward / Ebina City / Atsugi City
Kakeru Koumuten!
By replacing your old air conditioner with a new one, you can resolve issues such as poor cooling, water leaks, and unusual noises, while also saving on electricity costs. We will thoroughly check the size of the room, the outlets, and the placement of the piping and outdoor unit, ensuring that we carefully perform basic processes like vacuuming without skipping any steps.
On-site surveys and estimates are free of charge. We also welcome competitive estimates, so please feel free to contact us.
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株式会社翔工務店へ
株式会社翔工務店は平均年齢２０代後半の若い会社ですが、技術はどこにも負けていません。
いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます！
自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です！
