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Arbor Valley Custom Cabinetry
20 Questions

Mechanical

Automatic Heat Sensor

Thermal Trigger Activation

What is a hood 'Heat Sensor'? +
Luxury liners (e.g., Vent-A-Hood) include a thermistor that automatically turns the fan to "High" if it detects temperatures over 150°F. This protects the wood shroud and electronic components from thermal damage.

Safety hardware that automatically triggers high-speed exhaust if temperatures below the hood reach a critical threshold.

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Custom Hood Ventilation

Airstream & CFM Engineering

What are the ventilation requirements for a high-BTU professional range? +
Pro-ranges (Wolf/BlueStar) require hoods with 600–1200 CFM capacities. The hood width should ideally overlap the range by 3" on each side to capture bypass plume. Ductwork must be rigid galvanized steel (no flex) with a diameter of 8–10" to maintain static pressure efficiency and reduce decibel levels.

Engineering internal stainless steel liners and high-CFM blowers to safely exhaust heat within decorative wood shrouds.

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Downdraft Ventilation

Pop-Up Extraction Velocity

When should I use a downdraft vent? +
Downdraft units (e.g., Best/Cattura) are used in islands where an overhead hood isn't desired. They require a deep 27" cabinet carcass to house the pop-up mechanism and a 6" or 10" duct discharge through the floor.

Motorized exhaust systems that retract into the cabinetry; requires 12" of internal base cabinet depth for the blower housing.

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Duct Routing

Static Pressure Geometry

Can I run my range duct through a floor joist? +
Ducts for pro-ranges (8"+) typically cannot fit through standard I-joists without structural modification. We coordinate the "bulkhead" or "chase" design within the cabinetry to hide horizontal duct runs.

Technical limitations on duct length and elbow counts to maintain high velocity and prevent grease accumulation.

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Duct Silencer

Inline Noise Attenuation

What is a duct silencer? +
An insulated cylinder (muffler) installed in the duct run. It uses acoustic baffles to absorb high-frequency fan noise without restricting airflow, essential for open-concept "Great Room" designs.

A specialized acoustic muffler installed in the ductwork to absorb vibration and airflow noise.

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External Remote Blower

Exterior Wall/Roof Mounting

Can the blower be mounted on the roof? +
Yes. External blowers (roof or exterior wall mount) pull air through the system rather than pushing it. This is the quietest option for high-CFM requirements but requires a specialized weatherproof housing and electrical rough-in on the building exterior.

An ultra-quiet solution where the motor is mounted on the exterior roof or wall, pulling air away from the kitchen.

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Fire Suppression (Ansul)

High-Heat Chemical Discharge

Do residential kitchens need fire suppression? +
Standard homes do not, but if you install a commercial-grade charbroiler or wok-burner, Alberta codes may require an Ansul-style liquid suppression system integrated into the hood.

Required for high-BTU professional ranges in certain Alberta jurisdictions, involving integrated nozzles and fuel shut-offs.

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Fresh Air Intake

Building Envelope Penetration

Where should the MUA intake be located? +
The intake hood must be at least 10' away from any exhaust (range, furnace, or dryer) and 3' above grade to prevent snow blockage during Alberta winters.

Strategic positioning of supply air vents at least 10' from exhaust outlets to prevent cross-contamination.

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Grease Baffle Filters

Centrifugal Filtration Logic

What is the difference between Mesh and Baffle filters? +
Mesh filters trap grease in layers of aluminum; Baffle filters (standard for luxury hoods) force air to change direction rapidly, causing grease to condense on the stainless steel. Baffles are more durable, fire-safe, and dishwasher-friendly.

High-efficiency stainless steel filters designed to extract grease from high-heat cooking while remaining dishwasher safe.

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Hood Liner Clearance

Combustible Buffer Zones

How close can the wood be to the metal liner? +
The stainless steel liner must fully "encase" the bottom of the wood shroud. Most Alberta inspectors require the metal to extend 1/2" beyond the wood edge to act as a fire break and drip edge for grease.

Mandatory 30-36" vertical gap between the cooktop and wood components, protected by a non-combustible metal liner.

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In-Line Blower

Remote Extraction Mechanics

What is an 'In-Line' vs. 'Internal' blower? +
An internal blower sits inside the hood; an in-line blower is mounted in the attic or crawlspace. In-line systems are significantly quieter at the cooking surface because the motor noise is isolated from the kitchen via the duct run.

A remote blower mounted within the duct run (attic or joist) to significantly reduce noise levels at the cooktop.

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LED Driver Heat Shield

Electronic Component Thermal Protection

Where do the hood lights get power? +
The LED drivers for hood lighting generate heat. We mount them in a "cool zone" at the top of the shroud or in an adjacent cabinet to prevent premature failure caused by the range's rising heat.

Insulated housing for lighting transformers located near range hoods to prevent premature failure from high ambient heat.

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MUA Interlock

MUA Pressure Balancing

How does the hood communicate with the furnace? +
For systems over 400 CFM, we install a current-sensing relay on the hood's power line. When the fan starts, it sends a low-voltage signal to the furnace or dedicated MUA damper to open, equalizing house pressure.

A safety system that automatically opens a fresh air damper when the range hood exceeds 400 CFM to prevent backdrafting.

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MUA Tempering

Pre-Heating Intake Air

Does make-up air need to be heated? +
In Alberta, bringing in -30°C air directly to the kitchen can cause discomfort and pipe freezing. We recommend an "inline heater" for the MUA duct to temper the air to at least 10°C before it enters the living space.

Central Alberta spec for pre-heating incoming fresh air to prevent freezing pipes and cold drafts during winter operation.

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Plasma Filtration

Molecular Odor Neutralization

What is PlasmaMade filtration? +
A high-end recirculating alternative that uses an electronic plasma field to break down odors and grease at a molecular level. It is more effective than charcoal but requires a 120V outlet inside the hood shroud.

Advanced molecular filtration that destroys odors and grease at a cellular level, allowing for high-performance ductless venting.

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Pot Filler Coordination

Vertical Clearance Logic

Does a pot filler affect the hood design? +
The pot filler height must be coordinated so the "swing arm" doesn't hit the bottom of the hood liner or interfere with the baffle filters when they are removed for cleaning.

Coordinating the swing-arm radius of the faucet with the hood depth to ensure full range of motion over the burners.

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Recirculating Kits

Carbon Filtration Efficiency

Can a pro-range be non-vented? +
We strongly advise against it. Recirculating kits use charcoal filters to scrub air before returning it to the kitchen. They do not remove heat or moisture, which can damage high-end wood cabinetry and cause finish failure over time.

Filtration systems using charcoal to scrub odors when outdoor venting is impossible; requires regular filter replacement.

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Remote Hood Controls

Low-Voltage Switch Loops

How do you wire a remote hood switch? +
For ADA compliance or minimalist designs, we move the hood controls to a wall switch or island gable. This requires a 5-wire shielded cable run from the hood liner to the remote junction box during rough-in.

Secondary wiring runs allowing hood controls to be mounted at the backsplash for ADA accessibility or aesthetic clean lines.

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Sones Rating

Acoustic Performance Metrics

What is a 'Sone' rating? +
A measure of perceived loudness. A rating of 1.0 is roughly equal to a quiet refrigerator. High-end 1200 CFM blowers can reach 10+ Sones; we use silencers (inline mufflers) to drop this to manageable levels.

The measurement of perceived loudness; professional-grade blowers aim for under 2.0 sones at working speeds.

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Static Pressure

Equivalent Duct Lengths

Why is my hood fan so loud but not sucking air? +
This is usually caused by "static pressure loss" from too many 90-degree elbows or a duct diameter that is too small. We calculate the "equivalent duct length" to ensure the blower isn't choked by the infrastructure.

The resistance air faces within ductwork; critical for selecting the correct blower power for long or complex runs.

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