Dr Infrared Heater Dr-966 vs Dr-998: Which One Should You Buy?

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Below: how the two sides differ in power, wiring and coverage, the three units in this guide’s gear section ranked strongest first, and the wiring, safety and FAQ notes to read before you buy.

Dr Infrared Heater Dr-966 vs Dr-998: Hardwired Power or Portable Convenience?

Think of this as a wiring decision first and a heater decision second. The DR-966 commits you to a 240V hardwired circuit; the DR-998 class commits you to nothing more than a free 120V outlet. Here is how the two sides compare on the numbers the makers publish:

The takeaway is plain: the DR-966 brings far more power than either portable unit, but it needs a real electrical circuit to deliver it. The portables bring convenience, remotes and timers, and neither one asks an electrician for anything. If you are sizing a whole garage, our guide to what size garage heater you need and the 120V vs 240V garage heater comparison put those numbers in context.

The Gear: Three Infrared Heaters, Ranked

This guide’s gear section covers the three units with published listing data, strongest first.

1. DR. INFRARED HEATER DR-966: 240V Hardwired Shop Heater

The DR-966 is the only hardwired unit of the three and the only one built for a shop or commercial space: the maker lists 240V single phase, 3000 and 6000 W settings, 25 A, and 600 sq ft of heating coverage, with wall or ceiling mounting on the included bracket and 5 adjustable louvers to aim the airflow. The thermostat adjusts between 37 and 104 °F with high and low settings, the unit is UL/CUL listed, and the listing states a one-year parts and labor warranty. It measures 14.5 in deep by 13 in wide by 14.5 in tall and weighs 27 lb.

Two caveats come straight from the listing. First, the spec table contradicts itself: it lists the heating method as “Forced Air” while listing the heating element as “Radiant”, under a title and bullets that describe an infrared hardwired shop heater. Trust the title and bullets over the spec table, and check the manual before you buy. Second, no power cord is included: this is a hardwired install, which means a dedicated 240V circuit and a licensed electrician, not a weekend wiring job.

2. DR. INFRARED HEATER DR-991: Portable Fireplace-Style Heater with Humidifier

The DR-991 is the portable answer from the same maker: a freestanding 120V unit that plugs into a standard outlet for 1500 W of infrared heat. Its listing leads with ambiance rather than shop power: a 3D flame effect with two adjustable brightness levels, a built-in humidifier meant to counter dry winter air, and a remote plus LED display with 3 heat settings (high, low and auto) and a 12-hour timer. It is ETL listed with tip-over and overheat protection, weighs under 20 lb, and ships with a 6-foot cord.

Be clear about what it is: a fireplace-style supplemental heater for a room, not a shop heater. Its listing states no heating coverage figure, and nothing in it suggests mounting or hardwired use. For warming the bench area of a garage rather than the whole space, it is the convenient plug-in pick of the three.

3. OSTBA 1500W 6-Element Infrared Cabinet Heater

The OSTBA is the lightest and simplest portable of the three: a 120V cabinet unit with six heating elements, 1500 W on high, a 1000 W low setting and an ECO mode, aimed through a digital thermostat of 41 to 95 °F with a 0-12H timer and a child lock. It runs on 12.5 A, weighs 7.1 lb, measures 12.91 in deep by 11.65 in wide by 14.96 in tall, and includes a remote plus tip-over and overheat protection and a fan-only mode for warmer months.

Two notes. The maker’s stated heating coverage is 1000 sq ft from a 1500 W plug-in unit, which is an ambitious claim worth reading as the maker’s claim, not a promise. And its listing’s recommended uses are bedroom, home and office, with the unit designed for indoor household use, so treat it as a room heater you carry into the garage, not garage equipment. No warranty term is stated.

Wiring, Breakers and Garage Safety

Electric heat makes no carbon monoxide and needs no venting, which is the main safety advantage over fuel heaters. The rules that remain are electrical and practical:

• 240V means an electrician. The DR-966 is a hardwired 25 A unit with no cord included. Have a licensed electrician size the circuit and the breaker; our guide to breaker sizing for a 240V garage heater explains what the numbers on the listing mean for the panel.
• Respect the shutoffs. Tip-over and overheat protection are last-resort features, not operating instructions. Keep the clearances from walls, vehicles and combustibles that the manual lists.
• Do not leave portables running unattended. Turn them off and let them cool before you leave the garage for the night; a power cord is not a substitute for supervision.
• Keep fuel vapors away. Gas cans, solvents and brake cleaner live in garages, and their vapors ignite easily. Store them away from any heater and never heat while spraying flammables.

Frequently Asked Questions

What is the difference between the DR-966 and the DR-998?

Installation and power. The DR-966 is a hardwired 240V shop heater with 3000 and 6000 W settings and a stated 600 sq ft coverage; the DR-998 sits in the portable 120V plug-in class. For the DR-998’s own listing numbers, see our DR-998 review; for the portable side’s tradeoffs in stated specs, the DR-991 and OSTBA in the gear section above show the picture.

Can the DR-966 plug into a standard outlet?

No. Its listing states 240V, 25 A and hardwired with no power cord included. It needs a dedicated 240V circuit installed by a licensed electrician; see our breaker sizing guide before you plan the circuit.

Why does the DR-966 listing say both forced air and radiant?

That is a contradiction inside the listing: the spec table lists the heating method as “Forced Air” while the heating element is listed as “Radiant”, and the title and bullets describe an infrared hardwired shop heater. Trust the title and bullets over the spec table, and confirm the heating method in the manual; our infrared vs forced air comparison explains what each style means in a garage.

Will a 1500W portable heater warm my garage?

Both portable units in this guide top out at 1500 W on a standard 120V outlet, which suits spot heat near a workbench rather than a whole garage. The DR-991’s listing states no coverage figure; the OSTBA’s maker claims 1000 sq ft, which reads as a maker claim. Work out your space first with our garage heater sizing guide.

Is the OSTBA heater actually a garage heater?

Its listing’s recommended uses are bedroom, home and office, and it is designed for indoor household use, so treat it as a room heater you carry into the garage rather than garage equipment. It does include tip-over and overheat protection, a child lock and a timer, which are the safety features to look for in any portable.

Do electric infrared heaters need a carbon monoxide alarm?

Electric heaters produce no combustion gases, so they create no carbon monoxide themselves. Garages still deserve caution: stored fuels and solvents give off flammable vapors, and any attached garage benefits from alarms per the maker’s guidance and local code. Never run a fuel engine or an unvented fuel heater in a closed garage.

Related: our DR-998 review, garage heater sizing by BTU, the best garage heaters for a 2-car garage, our garage upgrades hub and the best infrared garage heaters.