A HRV system remains a niche solution for home air ... your HRV requires maintenance and upkeep," reminds Stockhammer. "The best way to ensure it’s in good shape is to bring in a technician ...

On a Garmin smartwatch, you may see "HRV status" as one of the statistics being tracked. HRV stands for "heart rate variability," a measurement of the time that elapses between heartbeats ...

While its job is to replace stale indoor air with fresh air from the outside, it also works to minimize the demands on your heating system. To learn more about the elusive HRV, we tapped Susanne ...