| generate heat | 0.61 |
| store hot water | 0.58 |
| provide viable alternat… | 0.53 |
| heat floor | 0.53 |
| use electricity | 0.52 |
| use resistance heating … | 0.47 |
| work under similar prin… | 0.40 |
| come in a 3 types | 0.37 |
| pass the water | 0.37 |
| produce gas leaks | 0.36 |
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| different outputs | 0.37 |
| mixed reputation | 0.30 |
| efficient | 0.58 |
| more suitable | 0.54 |
| quiet | 0.46 |
| more eco-friendly | 0.44 |
| more compact than gas b… | 0.43 |
| lighter | 0.43 |
| less expensive | 0.43 |
| faster | 0.37 |
| competitive | 0.33 |
| safe | 0.30 |
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| large water tank | 0.46 |
| affordable option | 0.45 |
| specialized item | 0.38 |
| a convenient process un… | 0.37 |
| voltage | 0.34 |
| circuit breakers | 0.34 |
| peak load controllers | 0.34 |
| safety interlocks | 0.34 |
| need | 0.33 |
| great combination | 0.31 |
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| easy to control | 0.59 |
| placed in operation | 0.53 |
| reserved for industrial… | 0.48 |
| compared to a gas boiler | 0.38 |
| operated by heavy duty | 0.34 |
| vented | 0.31 |
| costly to run | 0.28 |
| manufactured by swedish… | 0.26 |