Happy (Unofficial) Design Day!
In Boston, a 99.6% heating design day is defined by ASHRAE as an outdoor temperature of 7.4°F 
That means this cold snap is exactly what MEP engineers design for — the day when systems are pushed to prove they were sized right.
So don’t forget to wish your favorite MEP engineering friends a happy design day this week!
And if your home or office stays warm while it’s freezing outside…
thank an engineer who did their job properly. 
