What it delivers
The APUS AP-ADSF-45M06 4.5 kW Point-of-Use Tankless Water Heater is a point-of-use electric tankless rated at 4.5 kW on 240 volts.
At a 45°F rise (mild inlet water to a 120°F set point) it holds about 0.7 GPM, less than one 2 GPM shower; in winter, at a 70°F rise, about 0.4 GPM, less than one 2 GPM shower. Try your own inlet temperature.
At 240 volts 4.5 kW is about 19 amps. The maker calls for 30A double-pole breaker. A licensed electrician confirms the panel, the service and the wire before it goes in.
Point-of-use units go under or beside one sink, where a short pipe run means hot water in seconds.
From the listing: connections: 1/2" npt; material: Acrylonitrile Butadiene Styrene; model: AP-ADSF-45M06; warranty: 2 Year Manufacturer Warranty.
The listing gives dimensions of 6.5 in (W) x 8.66 in (H) and a weight of 3.5 lb.
Warranty, per the listing: 2 Year Manufacturer Warranty.
Right unit for this house?
Install it when
- One sink or a low-flow shower
- A far bathroom with a long wait for hot water
Look at another unit when
- Whole-house hot water
- Kitchen sinks at full flow in cold climates
Strengths and trade-offs
Strengths
- 4.5 kW
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Flow drops with cold inlet water
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | AP-ADSF-45M06 | Retailer |
|---|---|---|
| Dimensions (seller) | 6.5"W x 8.66"H | Retailer |
| Features (seller) | 3s Instant Hot Water, LED Display, Lightweight, Overheat Protection, Self-Modulating | Retailer |
| Power | 4.5 kW | Retailer |
| Voltage | 240 V | Retailer |
| Product weight | 3.5 lb | Retailer |
| Material | Acrylonitrile Butadiene Styrene | Retailer |
| Warranty | 2 Year Manufacturer Warranty | Retailer |
| Breakers (maker) | 30A double-pole breaker | Retailer |
| Connections | 1/2" npt | Retailer |
Rival units at this flow
More point-of-use water heaters rated for similar demand
- Camplux TE04N 3.5 kW Point-of-Use Tankless Water Heater
- Stiebel Eltron Mini 3.5-1 3.5 kW Point-of-Use Tankless Water Heater
- Camplux TE06ProN2 6 kW Point-of-Use Tankless Water Heater
- Camplux TE06ProN5 6 kW Point-of-Use Tankless Water Heater
Full point-of-use water heaters spec grid · Every APUS unit in the catalog
Final verdict
A solid point-of-use electric tankless for one sink or a low-flow shower.
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