INFINITY vs PULSE: Which HVAC Diffuser for Your Square Footage?

Both connect to your HVAC system. Both use the same waterless cold-air diffusion. Both run on Bluetooth scheduling. The difference is $250 and about 14,000 square feet of rated coverage.

Here's how to work out which one your house actually needs — and why buying the bigger one isn't automatically the safer choice.

The short answer

Under 1,800 sq ft: the PULSE at $149. This covers most two- and three-bedroom homes, and it's where the majority of people land.

Over 1,800 sq ft, tall ceilings, or two HVAC zones: the INFINITY from $399.

Shop the PULSE — $149 →

Side by side

	PULSE	INFINITY
Price	$149	$399, or $449 with three oils
Rated coverage	Up to 1,800 sq ft	Up to 16,000 sq ft
HVAC capacity	Residential systems	Up to 10 tons
Control	Bluetooth scheduling	Bluetooth scheduling
Noise	Mounts by the air handler	Under 35 dB, mounts by the air handler
Installation	~30 min, supply duct	~30 min, supply duct

Both figures are manufacturer-stated, and there's no shared testing standard for scent coverage anywhere in this industry. Ceiling height, floor plan, and blower runtime move the real number.

Why bigger isn't automatically safer

The instinct is to buy the larger unit for headroom. Sometimes that's right — but not always, and it's worth understanding both directions.

The case for sizing up: a unit running well below its ceiling is quieter, uses oil more slowly, and distributes more evenly than one working flat out. In a 2,000 sq ft home, an INFINITY at a low setting will outperform a PULSE at maximum.

The case against: in a genuinely small home, 16,000 sq ft of capacity is capacity you will never use. You'd be paying $250 for headroom that sits idle, when the same $250 buys a lot of fragrance oil.

The dividing line is roughly 1,800 sq ft, with three things that push you upward regardless of floor area.

Three reasons to choose INFINITY below 1,800 sq ft

1. Tall or vaulted ceilings. Coverage ratings assume standard eight-foot rooms. A 1,500 sq ft home with 14-foot ceilings holds nearly twice the air its floor plan suggests, and scent rises.

2. Two HVAC zones. If upstairs and downstairs run on separate systems, one diffuser only scents the zone it's connected to. You either need a unit per zone, or you accept half the house is unscented.

3. A commercial space. Salons, clinics, boutiques, and offices have doors opening constantly, which vents scent continuously. INFINITY's 10-ton HVAC rating exists for exactly this.

Shop the INFINITY — from $399 →

What's identical between them

Worth knowing, because it means you're not compromising on the fundamentals by choosing the cheaper unit.

• Same diffusion method. Waterless cold-air, no heat, no residue in the ductwork.
• Same installation. Roughly 30 minutes, one small port in the supply duct, no modification to the HVAC unit itself.
• Same oils. Both take bottled fragrance oil formulated for nebulizing — $33 for 120ml, $45 for 200ml, $69 for 500ml.
• Same placement. Both mount beside the air handler, so neither is audible in your living space.
• Same guarantee. 30 days on both.

A PULSE in the right-sized home is not a lesser experience. It's the same system with less headroom.

The bundle question

INFINITY comes two ways: $399 for the diffuser, or $449 with three premium oils — $135 of fragrance for $50.

Since no diffuser produces scent without oil, the bundle is the sensible start unless you're already stocked. PULSE is sold as the unit alone, so budget for a bottle alongside it.

If neither fits

No ducted air, or renting? Neither applies — both need ductwork you own. The HALO Tower covers up to 4,000 sq ft from a single outlet, from $229.

Only want one room? Don't buy an HVAC system at all. The ECHO at $139 covers up to 1,500 sq ft from a countertop.

Shop the HALO Tower — from $229 →

Frequently Asked Questions

Is INFINITY worth $250 more than PULSE?

Only if you can use the coverage. Above 1,800 sq ft, with vaulted ceilings, in a two-zone home, or in a commercial space — yes. In a standard 1,400 sq ft house, that $250 buys headroom you'll never reach.

What if my home is right at 1,800 sq ft?

Look at ceiling height and layout rather than the number. Standard ceilings and an open plan, PULSE is fine. Tall ceilings or many closed doors, size up.

Can I add a second PULSE instead of buying an INFINITY?

For a two-zone HVAC system, yes — one per zone is the correct approach and often cheaper. For a single large zone, one bigger unit distributes more evenly.

Do they use different oils?

No. Both take the same bottled fragrance oils.

Is installation harder for the INFINITY?

No. Both mount near the air handler and connect to the supply duct with a hose — about 30 minutes with basic tools, no electrical work.

What if I size wrong?

Every diffuser comes with a 30-day satisfaction guarantee. Send it back for a full refund.