What ventilation options are best for a kitchen renovation in NB?

Proper kitchen ventilation in New Brunswick requires a range hood rated at least 100-400 CFM depending on your cooking style, with makeup air considerations for tighter homes and special attention to moisture management during NB's humid summers.

The range hood is your primary defense against cooking moisture, grease, and odors in an NB kitchen. For electric cooktops, plan for 100-150 CFM per linear foot of cooking surface. Gas ranges need higher capacity — 150-200 CFM per linear foot — since gas combustion adds moisture and combustion byproducts to your indoor air. A standard 30-inch range needs a 300-400 CFM hood for effective capture, while serious cooks using high-BTU gas ranges should consider 600-900 CFM units.

Ducted range hoods that exhaust directly outside are always superior to recirculating models in NB's climate. Route the ductwork through the shortest, straightest path to an exterior wall or roof termination. Use 6-inch rigid metal ductwork rather than flexible ducting to minimize airflow restriction and grease buildup. The exterior termination needs a backdraft damper to prevent cold air infiltration during NB's winter months and a pest guard to keep insects and small animals out.

New Brunswick's Maritime humidity makes kitchen ventilation even more critical during summer months when indoor humidity can reach 60-70%. Without adequate exhaust ventilation, cooking moisture combines with ambient humidity to create condensation problems on windows, walls, and inside cabinets. This excess moisture can warp cabinet doors, damage drywall, and create conditions for mold growth behind backsplashes and around windows.

Makeup air becomes essential in newer, tighter NB homes when installing high-capacity range hoods over 400 CFM. These powerful fans can create negative pressure that interferes with furnace operation, draws cold air through gaps around windows and doors, or even causes backdrafting of gas appliances. For hoods over 400 CFM, consider a makeup air system that introduces tempered outdoor air when the hood operates, or install a variable-speed hood that provides adequate ventilation without overwhelming your home's air balance.

Heat Recovery Ventilators (HRV) or Energy Recovery Ventilators (ERV) are excellent additions to NB kitchen renovations, especially when combined with a properly sized range hood. An HRV provides continuous fresh air exchange while recovering heat from exhaust air — crucial during NB's long heating season. An ERV also transfers moisture, helping manage humidity levels during summer. These systems typically cost $2,000-$4,000 installed and significantly improve indoor air quality year-round.

Window ventilation can supplement mechanical systems but shouldn't be your primary strategy. Casement or awning windows near the cooking area provide natural ventilation during mild weather, but NB's winter conditions make relying on windows impractical for 5-6 months annually. Operable skylights over kitchen islands or peninsulas add both natural light and ventilation options.

For island cooking installations, downdraft ventilation systems are available but generally less effective than overhead hoods. If your kitchen layout demands island cooking, invest in a high-quality island hood with adequate CFM rating and proper ductwork routing through the floor or ceiling structure.

Installation considerations for NB include ensuring the exterior termination is positioned to prevent ice buildup during winter freeze-thaw cycles. Mount the termination at least 12 inches above expected snow levels and angle it slightly downward to shed moisture. Use stainless steel or aluminum terminations in coastal areas where salt air accelerates corrosion.

Professional installation is recommended for any ductwork routing through exterior walls, especially in older NB homes where proper air sealing around penetrations is critical for energy efficiency. Electrical connections for range hoods require TSANB-licensed electricians, particularly for hardwired installations or any new circuit work.

Budget $300-$800 for a quality ducted range hood, $500-$1,500 for professional installation including ductwork, and $2,000-$4,000 for HRV/ERV systems. The investment in proper kitchen ventilation pays dividends in indoor air quality, moisture control, and protecting your renovation investment from humidity damage.

Need help finding an experienced contractor for your kitchen ventilation installation? New Brunswick Renovations can connect you with local HVAC and kitchen renovation professionals who understand NB's climate requirements.