Imperial

Imperial makes the steel ventilation components that handle Montana’s weather swings. Their R2 Series exhaust/intake hoods and floor registers aren’t fancy, but they’re built right — galvanized steel construction, convertible designs, and specs that matter when you’re dealing with 100-degree temperature differentials between summer and winter.

R2 Series Exhaust/Intake Hoods: The 2-in-1 Solution

The R2 Series gives you a convertible design that switches between exhaust hood and intake hood by removing or installing the damper. That flexibility matters when you’re planning ventilation systems that might need to change function based on seasonal needs or building modifications.

These hoods come in 4-inch duct diameter with galvanized steel construction — not the plastic alternatives that crack in cold weather. The brown-painted model weighs 3.65 pounds, while the white galvanized version comes in at 2.04 pounds. Both handle exterior mounting without rust issues.

Specification	Brown Model	White Model
Duct Diameter	4 inches	4 inches
Weight	3.65 lbs	2.04 lbs
Material	Galvanized steel (painted)	Painted galvanized steel
Finish	Brown	White (paintable)

The anti-backdraft damper prevents heat loss — critical when you’re paying to heat a building through Montana winters. Optional metal screens keep birds and insects out, though you’ll remove those screens for dryer venting to prevent lint buildup.

Applications include bath fan venting, kitchen range hood venting, dryer venting, and fresh air intake when converted. The galvanized steel holds up to freeze-thaw cycles better than plastic, and both finishes can be repainted to match home exteriors.

Steel Floor Registers: Built for Real Traffic

Imperial’s floor registers come in solid steel construction with powder-coat finishes that actually last. The 4x10 model features 1.5mm thick steel faceplates — thick enough to handle foot traffic without bending.

Size	Duct Opening	Faceplate Dimensions
4x10	4 in x 10 in	5-1/4 in x 11-5/16 in
2-1/4x10	2-1/4 in x 10 in	Approx. 3-1/2 in x 11-1/4 in

The dampers use high-impact polystyrene that won’t rust — smart design since these sit right where condensation forms. Adjustable multi-directional dampers (2-way or 4-way) let you control airflow patterns, and the rolled fin design adds strength while preventing sharp edges.

Available finishes include matte black, bronze-age, chocolate, white, brown, brushed nickel, pewter, gray granite, and satin nickel. The powder-coat finish resists chips and scratches better than painted alternatives.

Return Air Grilles: Simple and Solid

Imperial offers return air grilles in both all-steel and high-density polystyrene construction. The fins are spaced at 1/3 inch and set at a 20-degree angle — standard geometry that provides good airflow without whistling.

The steel models feature 7/8-inch margin turnback, while the polystyrene versions use 3/16-inch turnback. Both mount securely to sidewalls or baseboards. The polystyrene option makes sense in high-moisture areas where rust could be a concern, though the powder-coated steel versions hold up fine in most applications.

The Bottom Line

Imperial’s HVAC components do what they’re supposed to do without drama. The convertible hood design solves real problems on jobsites where plans change. The heavy steel registers handle abuse. The backdraft dampers actually prevent heat loss.

These aren’t the cheapest options on the shelf. But when you’re cutting holes in walls and floors that need to perform for decades in Montana’s climate, the extra durability of galvanized steel and quality damper mechanisms pays off. The 2-in-1 hood design alone can save a trip back to the supply house when ventilation plans change mid-project.

Frequently Asked Questions

Can the white galvanized R2 hood be painted to match siding? Yes, the white galvanized steel surface can be painted to match the exterior color of your home. Prep the surface properly and use paint rated for metal exteriors.

What’s the difference between the steel and polystyrene return air grilles? Both use the same fin spacing (1/3 inch at 20-degree angle), but the polystyrene versions are rustproof and have rounded corners for safety. Choose polystyrene for high-moisture areas or where rust might be a concern.

Should the screen be removed for dryer venting? Yes, you must remove the screen when using these hoods for dryer venting to prevent lint buildup. Keep the screen for bathroom exhaust or fresh air intake applications.

How thick is the steel on the floor registers? The 4x10 floor registers use 1.5mm thick solid steel faceplates. This thickness handles normal foot traffic without bending or warping.

Can the R2 hood really work as both exhaust and intake? Yes, it converts between exhaust and intake by removing or installing the internal damper. This gives you flexibility for different ventilation configurations without buying separate hoods.