Your existing vent opening becomes heat-recovery ventilation.
Simply fit it into the existing 100 mm air inlet of an exhaust-only (type 3) ventilation system. No new wall openings, no ducts.
- Fits existing 100 mm air inlets
- Temperature exchange efficiency up to 95 % (self-declared)
- 100 V AC power only, no control wiring
For builders, renovation companies and architects. We do not sell directly to private customers.
Is outdoor air still coming straight in through the air inlet?
With 24-hour exhaust ventilation (type 3), the air inlets let in cold outdoor air in winter and hot, humid air in summer. When residents close the inlet because it feels cold, the room is not ventilated enough, moisture builds up, and condensation and mould can follow. Heating and cooling then have to work harder.
Kaiteki Kanki Reform KKR100 turns this inlet into an opening that ventilates while recovering heat.
Supply and exhaust switch every 60 seconds
KKR100 is a fan unit with a heat-storage element that sits inside the wall.
1. Exhaust phase
Heat from the room air is stored in the ceramic heat-storage element.
2. Supply phase
Incoming outdoor air passes the element and is brought close to room temperature before it enters.
3. Pair operation
With two units set to “reverse sync”, one unit supplies while the other exhausts, so supply and exhaust stay balanced.
Temperature exchange efficiency: up to 95 % (self-declaration under JIS Q 17050-1, tested to JIS B 8628 / JRA 4059:2007). Models with a humidity sensor adjust the switching time between 30 and 150 seconds. On summer nights, “night purge” mode runs supply only or exhaust only, without heat exchange, to bring in cool outdoor air.
Installation in three steps
- Remove the indoor cover of the existing air inlet
- Insert KKR100 Fan unit, heat-storage element, indoor cover
- Connect it to 100 V AC power Standard: wired by a licensed electrician. A plug-in version is also available.
The existing outdoor hood can stay in place. If a new hood is wanted, a wind-resistant ABS outdoor hood (NWC) is available.
- Opening: existing 100 mm air inlet (sleeve outer diameter 114 mm)
- Required depth: at least 114 mm
- Wall sleeve: 400 mm long, can be cut to the wall thickness
Specifications
| Type | Ductless heat-recovery ventilation (type 1, alternating supply/exhaust) |
|---|---|
| Model number | SKH100KKR-100 |
| Temperature exchange efficiency | up to 95 % (self-declared) |
| Airflow (one unit) | 34 m³/h |
| Effective airflow (for ventilation calculations) | 17 m³/h per unit *1 |
| Power consumption | max. 1.2 W |
| Specific power input | 0.035 W/(m³/h) per 34 m³/h / 0.07 W/(m³/h) per 17 m³/h effective airflow |
| Fan | RiemannFan (12 V DC) |
| Heat-storage element | ceramic honeycomb cartridge, Ø 90 mm × 100 mm |
| Protection class | element and fan: IP68 |
| Unit size | Ø 93 mm, length 160 mm |
| Wall sleeve | outer Ø 114 mm, 400 mm long (can be cut) |
| Power supply | 100 V AC (accepts 90–240 V, 50/60 Hz) |
| Declaration | JIS Q 17050-1 self-declaration (JIS B 8628, JRA 4056:2006, JRA 4059:2007, JIS C 9603) |
*1 KKR100 units work as a pair: while one unit supplies air, the other extracts, and they switch back and forth. One unit moves 34 m³/h, but the effective ventilation is 17 m³/h per unit. Use 17 m³/h in ventilation calculations.
| Model | Sensor | Operation |
|---|---|---|
| KKR100 | none | touch panel / switch |
| KKR101 | humidity | touch panel / switch |
| KKR102 | CO₂ + humidity | touch panel / switch |
| Airflow | 4 levels |
|---|---|
| Modes | heat-exchange mode / night purge (supply or exhaust) |
| Sleep | stops for up to 4 hours, then restarts automatically |
| Several units | master / same-direction sync / reverse sync / not synced |
| Internet | Wi-Fi (WPS or QR code) for software updates |
Delivery options: set with ABS NWC outdoor hood and sleeve / set with sleeve, without hood / unit only. Prices are given in the quote.
Energy: four units running all year at maximum power (1.2 W) use about 42 kWh (1.2 W × 4 × 8,760 h).
Maintenance
Clean at least once a year. Remove the indoor cover, unplug the connector from the circuit board, release the cable from the clips on the mounting base and pull out the fan unit. The fan unit and the filter can be washed with water; let them dry well before refitting.
FAQ for builders and renovation companies
Which openings does it fit?
Existing 100 mm air inlets (sleeve outer diameter 114 mm). It needs a depth of at least 114 mm. Please send photos of the site with your request.
What airflow should be used in the ventilation calculation?
17 m³/h per unit. KKR100 units work as a pair and alternate between supply and exhaust, so half of the 34 m³/h airflow of one unit counts as effective ventilation.
Is electrical work needed?
The unit runs on 100 V AC; no control wiring is needed. The standard version is hard-wired by a licensed electrician. A plug-in version for a wall outlet is also available.
Can the existing outdoor hood be used?
Yes, it can stay in place. For a new hood, choose the wind-resistant ABS hood NWC.
Can private customers buy it?
We are sorry, we do not sell directly to private customers. Please show this page to your builder or renovation company.
KKR100 also has its own Japanese landing page: 95p.jp.
Free quote and ventilation layout
Send us photos of the existing air inlets and the floor plan. We propose the number of units and their placement (documents in Japanese).