New York City just made its "Open Restaurants" program permanent. Originally set to expire at the end of the October, the al fresco dining program -- which allows restaurants to use sidewalks and curb lanes adjacent to their business -- is now being thought of as something that will permanently reshape public space in the city.

Along with this announcement, the City also provided clarity on how heating and enclosures may be used throughout the winter months. Electrical heaters can be used anywhere. But propane heaters can only be used on sidewalks and you'll need to get a permit from the fire department. Prior to this announcement, there was an outright ban on propane heaters.

Tents and other enclosures are now permitted, but at least 50% of the side walls needs to remain open for ventilation. Otherwise it gets classified as indoor dining and those rules would then apply. However, fully enclosed structures, such as cool looking Instagrammable domes, are allowed for individual parties provided there's "adequate ventilation." Whatever that means.

This is yet another example of how COVID-19 is forcing us to reconsider the way we think about and use public space within our cities -- perhaps forever. And in this particular case, it'll be interesting to see to what extent cities embrace dining outside in the winter. Some of us already do it when we, for example, après ski. Could the same thing work in our cities?

Photo by Aleks Marinkovic on Unsplash

You might then be wondering why we don’t rely on 100% fresh air in all buildings. And the reason is that it is incredibly expensive to do so. When you take in fresh air from outside, it needs to be conditioned before it can be distributed. And that takes energy. In the winter when it’s -10 degrees outside (hello Toronto), you need to heat up that air. Whereas recirculating air is already conditioned. So you just, well, recirculate it.

In most condo buildings, makeup air is supplied by dumping air into the corridors. To check if your condo functions like this, just look for a big vent outside in your hallway. This air then gets sucked into the individual suites by way of slits or openings around your front door.

So another way to check if your building operates this way is to see if your front door is letting in air from the hallway (or if it’s sealed). There’s nothing necessarily wrong with this approach, but sometimes you might end up pulling in smells from outside of your suite.

This now brings us to Energy Recovery Ventilation (ERV) units.

The way an ERV works is very simple. Let’s use our winter example, where it’s -10 outside (and you’re questioning why you live in a place that’s so cold). In this scenario, you’d be pulling in freezing air and exhausting out warm air from your apartment.

What the ERV does is transfer some of the warmth from the warm exhaust air to the cold intake air. This means the fresh air ends up coming inside your place at a warmer temperature and doesn’t need to be heated up as much. It’s “preconditioned.”

This saves energy. And it saves in utility costs.

But the other benefit of these ERV units is that, instead of pulling fresh air (or makeup air) from the corridor, it pulls it directly from outside of your condo suite. In other words, your front door is sealed and each suite is responsible for its own fresh air demands. The overall result is typically better indoor air quality, better energy efficiency, and lower utility costs.

At both DUKE and Kingston&Co, which are two condo projects that I’m currently working on a TAS, we’re putting an ERV unit into every suite. We think it make sense. But there are always questions around how much purchasers actually care about measures like this. Things like fancy countertops and appliances are usually what sells. Not some hidden mechanical unit that you’ll never see or even know exists.

But I think details like this matter. What about you?

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