Maintaining Balanced Ventilation in Your Home

This alternating airflow doesn’t just keep your home balanced—it also helps it stay comfortable year-round. That comfort starts with maintaining balanced ventilation, ensuring the same amount of fresh air enters as stale air leaves. As the fans switch directions, the system captures energy from the outgoing air—whether warm or cool—and transfers it to the incoming fresh air. It’s a simple, efficient way to keep your home’s temperature stable, and your air fresh without wasting energy.

This article focuses on what balanced ventilation means and how LUNOS achieves it using two fans that work together.
In a follow-up article, we’ll look a little deeper—exploring how that balance behaves when other fans run, when multiple units are installed, and how it connects to the ventilation requirements of Canada’s National Building Code.

When that balance is lost—say, when an exhaust fan pushes out more air than the home can replace—outdoor air sneaks in through cracks, wall cavities, or under doors. That can bring unwanted drafts, humidity, dust, and even outdoor pollutants into your living space. In winter, warm air is pulled out and replaced by cold air that your heating system must work harder to warm up.

Balanced ventilation solves this by keeping airflow predictable and consistent. You get cleaner air, steadier temperatures, and no surprises—like fogged-up windows, stale smells, or that heavy “stale air” feeling when you walk into a closed room.

LUNOS makes maintaining balanced ventilation simple by design—its two fans alternate direction to keep airflows equal. Lunos ventilation works on a simple but powerful idea: keep fresh air moving through your home without wasting the energy already used to heat or cool it.

Unlike traditional systems that move air through long runs of ducting from a central unit, Lunos works right where it’s needed—room by room. The principle is the same whether it’s the Lunos e², installed in communicating pairs, or the Lunos Ego, which houses both fans in a single unit for smaller spaces. Each model uses the same core principle, just packaged differently to suit your space.

Each unit moves air in two directions through a pbD heat exchanger—a high-performance material that captures the energy from outgoing air and uses it to temper the incoming air. The system continuously cycles through three simple phases:

1. Extraction Phase: Warm or cool indoor air is exhausted through the pbD core, which absorbs and stores that thermal energy.
2. Reversal Phase: After about 70 seconds, the fan reverses direction. Fresh outdoor air is drawn in and passes through the same pbD core, where it picks up the stored warmth (in winter) or coolness (in summer).
3. Continuous Cycle: Paired units—or opposing fans in an Ego—alternate between exhausting and supplying air, keeping the airflow balanced and the indoor temperature stable. This steady rhythm means your home is always breathing, but never losing its comfort.

Even in extreme Canadian conditions, this design outperforms systems that simply exhaust air without recovery. By reusing energy that would otherwise escape outdoors, Lunos keeps your air fresh, your rooms comfortable, and your energy use low.

You can think of it as a gentle exchange happening quietly behind the scenes—your home breathing in and out, staying balanced, comfortable, and energy efficient.

Today’s homes are built tighter than ever—a win for energy efficiency, but it also means humidity, CO₂, and pollutants can build up without proper ventilation.

Lunos is ideal for modern, airtight buildings because it delivers continuous fresh air without creating pressure imbalances that interfere with heating systems or cause infiltration.

It’s equally effective in older homes or retrofits where ducting isn’t practical. Each unit runs on low-voltage power and installs directly through exterior walls, making it easy to add balanced ventilation to any room or renovation.

• Fresher indoor air: Continuous, balanced air circulation prevents stale or musty odours, keeping every room feeling open and comfortable.
• Healthier environment: Consistent air exchange helps reduce allergens, moisture, and indoor pollutants for cleaner, healthier breathing air.
• Energy savings: The heat-recovery design keeps warmth inside during winter and reduces cooling loss in summer. Because each unit runs on low-voltage power and uses only a few watts, it consumes far less electricity than most mechanical systems.
• Quiet and efficient: Designed for steady, low-speed operation, Lunos runs almost silently in the background while maintaining balanced airflow.
• Simple maintenance: Just clean or replace the filters periodically—no ducts to clean and no complicated servicing.

Every Lunos system works as a team—two fans alternating direction to keep your home’s air balanced, clean, and comfortable.

Unbalanced ventilation can lead to unpredictable airflows, energy loss, and poor indoor air quality. Balanced ventilation, on the other hand, keeps things steady and predictable.

As the BCIT study reminds us: controlling airflows is central to maintaining healthy indoor air. The Lunos system achieves that control naturally—by design.

Lunos makes it easy to bring balanced ventilation to any home—quietly, efficiently, and without complex ductwork.

Two fans really do make a difference—ready to experience the difference balanced ventilation can make? Reach out to Lunos Canada to learn which system is right for your home. Whether you’re building new, renovating, or improving comfort in an existing space, our team can help you design a solution that brings fresh air, comfort, and efficiency together.

Ever wonder what happens when a bathroom fan, range hood, or extra LUNOS unit comes into play?  Our next article takes a closer look at those everyday situations—and how LUNOS keeps your home’s air balanced through them all.

To learn more about how LUNOS systems can improve comfort and air quality in your home, explore the articles below: