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.
The sun sets behind medium security Federal Correctional Institution, Terre Haute. Dzohkar Tsarnaev would likely behind at the maximum security penitentiary nearby.Reuters. Boston bomber Dzhokhar Tsarnaev has been sentenced to death, but it may be years before he's executed because of a lengthy appeals process.