While solar water heaters are typically considerably more expensive up front, "operational costs ... Perhaps the most important factor when it comes to picking a water heater is water capacity.

Air then flows through the radiator, picking up heat energy from the exhaust gas. See [Christopher’s] explaination, and some thermal readings while the dryer is running, in the video after the ...

We tried to measure the volume of this heater in our tests, but our decibel reader couldn’t pick up anything above the basic room tone. Sensitive ears may notice a low electrical hum ...