INFINITY vs HALO Tower: Which Whole-Home Scent System Is Right for You?

If you're deciding between the INFINITY and the HALO Tower, you've already worked out that plug-in diffusers and candles won't scent a whole house. Both of these will. They just go about it in completely different ways, and the right answer depends less on budget than on one question: can you connect to your HVAC system?

Here's how to choose.

The Short Answer

Choose the INFINITY if you own your home, have central air, and want the diffuser out of sight. It scents up to 16,000 sq ft through your ductwork.

Choose the HALO Tower if you rent, don't have ducted air, or simply don't want to touch your HVAC. It covers up to 4,000 sq ft and needs nothing but a power outlet.

Everything below is detail on that decision.

How Each One Distributes Scent

This is the real difference, and it drives everything else.

The INFINITY connects to your HVAC ductwork. When your air handler runs, it carries fragrance to every room the system serves. Coverage is even by design — no strong spot near the unit, no faint corners at the far end of the house. The tradeoff is that scent moves when your air moves. If your system is off for long stretches, distribution slows.

The HALO Tower is a floor-standing unit that pushes cold-air mist into the room it occupies, which then drifts through open space. In an open-plan home it works beautifully. In a house chopped into small closed rooms, scent concentrates where the tower is.

So the question isn't only how many square feet you have. It's how those square feet are laid out.

Side by Side

Five Questions That Settle It

1. Do you rent?

If yes, the HALO Tower is your answer. INFINITY installation connects to ductwork, and most leases don't allow that. The Tower moves with you.

2. Do you have ducted central air?

Mini-splits, window units, radiant heat, and baseboard heating have no ductwork to carry scent. Without ducts, the INFINITY has nothing to work with. Go with the Tower.

3. Is your floor plan open or closed?

Open-plan homes suit the Tower — air moves freely and one unit covers a lot. Houses with many closed doors favour the INFINITY, because ducts reach rooms that room air never will.

4. Do you want to see it?

The INFINITY lives at your air handler, usually in a closet, basement, or garage. Guests never see it. The Tower is a visible object in your living space. Some people like that; some don't.

5. How big is the space?

Above 4,000 sq ft, the INFINITY is the only one of the two that will genuinely cover it. Below that, both work and the other four questions decide.

What About Commercial Spaces?

For retail, hospitality, salons, and offices, the calculus shifts.

The INFINITY handles HVAC systems up to 10 tons, which covers most single-tenant commercial buildings. It scents the entire space from one unit and stays completely out of customer view.

The HALO Tower has one advantage the INFINITY doesn't: a lockable design. In a salon or boutique where staff and customers pass by constantly, that stops anyone from adjusting your settings. Its 800ml reservoir also means fewer refill trips during a busy week.

Plenty of businesses run both — the INFINITY for base coverage, a Tower in the entryway where first impressions form.

A Note on Oils

Neither unit produces scent without fragrance oil, so factor that into the price you're comparing.

Both are available as a bundle with three 200ml oils included, and in both cases the bundle is the better buy. INFINITY ships with Luxe Gold, Classic White Tea, and VIP. The HALO Tower ships with Cascade, Luxe Gold, and Classic White Tea. That's $147 of oil for $50 on the INFINITY and $70 on the Tower.

If you'd rather find your scent before committing, the Scent Card Sample Pack puts 15 of our fragrances in front of you for $15.

Frequently Asked Questions

Can I install the INFINITY myself?

Yes. It takes about 30 minutes with basic tools and connects to your ductwork without modifying the HVAC unit itself. No professional installation required.

Will an HVAC diffuser damage my system?

Cold-air diffusion adds no water and no heat, and leaves no residue in the ducts. It doesn't introduce the moisture that causes problems with other scenting methods.

Does the INFINITY only work when the air is running?

Scent distributes when air moves through the ducts. Most HVAC systems cycle regularly enough that this isn't noticeable. If you go days without running the system, a floor unit will be more consistent.

Can the HALO Tower scent a two-storey house?

Partly. Warm air rises, so scent will travel upward, but coverage upstairs will be weaker than in the room where the Tower sits. For even multi-floor coverage, the INFINITY is the better fit.

Can I use one of each?

Yes, and it's a common setup in larger homes and businesses — the INFINITY for whole-building base scent, a Tower in a specific high-traffic area.

Which is cheaper to run?

Oil consumption depends on intensity and run time more than on the unit. Both let you control output from the app, and both are more efficient than water-based diffusers because the oil isn't diluted.

What if I choose wrong?

Both come with a 30-day satisfaction guarantee. If the unit isn't right for your space, send it back for a full refund.

Making the Call

Most people overthink this. The decision comes down to one thing: whether you can and want to connect to ductwork.

If you can, the INFINITY gives you the most even coverage of any system we make, invisibly, across the largest area.

If you can't — or you rent, or you'd rather not touch your HVAC — the HALO Tower gets you most of the way there for $150 less and zero installation.

And if your space is under 1,800 sq ft with ducted air, look at the PULSE at $149 before either of these. There's no sense buying more coverage than your home can use.