You can block it. The unit won't heat or cool that room anymore though. The return air does effect supply air temp. And heat pump efficiency. With a 60 degree return air temp, the heat pump is more efficient then with a 70 degree return air temp.
We are simply getting contaminated causing otherwise healthy folks to lose the function of their kidneys and for a senior citizen who is already suffering sarcopenia this can be a death sentence because of the complexities associated with Renal Failure.
By the time youâre in your 30s, age-related muscle loss (sarcopenia) may already have begun if youâve neglected to take proactive steps to prevent it; Your muscles help keep your metabolic system intact, and maintaining muscle mass helps protect you against metabolic and hormonal decline, obesity, diabetes, and cardiovascular disease