Make-Up Air in a Kitchen Remodel: What It Is and When You Need It

Make-Up Air in a Kitchen Remodel: What It Is and When You Need It

Here’s the simple reality: if your kitchen range hood exhausts air out of your home, your home needs a safe, controlled way to replace that air. Otherwise, you can create negative pressure that hurts performance, comfort, and—depending on the home—can create safety concerns.

This guide explains what make-up air is, what can happen without it, when it commonly comes up in kitchen remodels (especially in tighter homes), and what system options exist. It also outlines the planning steps that help you avoid last-minute permit surprises and change orders.

For related planning, see Kitchen Appliances & Ventilation Upgrades and the companion post Range Hood CFM Sizing: How to Choose Ventilation That Works.

What Is Make-Up Air?

Make-up air is replacement air that enters your home when air is exhausted out. The most common trigger in a kitchen remodel is a powerful range hood vented to the exterior.

If your hood exhausts 600 cubic feet of air per minute (600 CFM), your house needs ~600 CFM of air coming back in. If it can’t, the house pulls air from wherever it can—often in ways you don’t want.

What Happens Without Make-Up Air?

Some homes “get away with it,” but many don’t—especially as homes become tighter due to upgraded windows, air sealing, and better insulation.

Common Symptoms

Range hood feels weak (smoke/odors linger)
Cold drafts at doors, basement, or fireplace area
Interior doors “stick” or slam when the hood runs
Backdrafting risk with fireplaces or fuel-burning appliances (home-specific)
Comfort issues: temperature swings near air entry points

Why It Comes Up More Often in Modern Remodels

Older homes are often leaky enough that air replaces itself through gaps and cracks. Remodels tend to reduce that leakage.

Make-up air is more likely to matter if:

Your home has newer windows, air sealing, or major insulation upgrades
You’re installing a higher-CFM range hood
You have an open floor plan where kitchen air spreads easily
You cook often with high heat (searing, frying, wok cooking)

When Do You “Need” Make-Up Air?

Make-up air triggers depend on local code, the hood’s airflow (CFM), and existing home conditions. Some jurisdictions commonly flag higher-CFM hoods for make-up air review (often 400+ CFM), but thresholds and enforcement vary.

Important: Requirements vary by city and project conditions. Confirm details with qualified professionals and your local building department early—before cabinets and drywall are finalized.

Many make-up air discussions start once you cross higher exhaust rates (often 400+ CFM). Systems and requirements vary—plan early.

Make-Up Air System Options (What Homeowners Should Know)

There isn’t one universal “make-up air system.” Options range from simple to highly integrated.

Motorized damper + dedicated intake

A controlled intake that opens when the hood runs. Can include filtration.

Pressure-activated damper

Opens when negative pressure is detected, often paired with filtration and quieter operation.

Tempered / pre-heated make-up air

Helps reduce cold drafts in winter and improve comfort. Coordination matters.

A real-world example of a simple make-up air approach using a pressure-activated damper with filtration.

Placement Rules That Keep Make-Up Air Comfortable

Make-up air can be “technically correct” and still feel awful if it’s delivered poorly. Comfort is a design problem, not just a mechanical one.

Practical rules of thumb:

Don’t blow make-up air directly on people (drafty)
Don’t blow it on surfaces (can be noisy and uncomfortable)
Keep the “air circuit” short (short, predictable airflow paths work best)

A clear explanation of the “3 rules” that help make make-up air effective without creating discomfort.

How Make-Up Air Ties Into HVAC and Permits

Make-up air is often coordinated with HVAC because incoming air affects comfort and pressure balance. It may also be reviewed during permitting and inspections depending on scope and jurisdiction.

Best practice: Treat ventilation and make-up air as part of your kitchen design blueprint—not an afterthought. The earlier it’s addressed, the easier it is to integrate cleanly.

A project example showing make-up air integrated with pre-heat connected to the hood—illustrating how coordinated systems can solve pressure and comfort issues.

In high-design homes, make-up air is often a “hidden” performance detail—planned precisely so you don’t feel it.

Planning Steps (So This Doesn’t Become a Change Order)

Choose your range and hood early
CFM and hood type drive the rest of the system.
Confirm duct routing feasibility
Venting to the exterior is ideal when possible, but routing constraints are real.
Ask about make-up air before cabinets are ordered
This is where cost and complexity stay manageable.
Coordinate with HVAC and permits
Requirements vary—confirm with qualified professionals and local authorities.
Prioritize comfort and noise
A system you hate will get bypassed. Comfort design matters.

FAQs: Make-Up Air in Kitchen Remodels

Is make-up air only needed for “big” range hoods?

It’s most commonly discussed with higher-CFM hoods, but the real driver is how tight your home is, how the system is designed, and what your local jurisdiction requires.

Can’t I just crack a window?

Opening a window can relieve pressure, but it’s not a consistent, code-aligned solution for many projects—and it’s not realistic for everyday cooking in cold or hot weather. A designed system is more reliable and comfortable.

Will make-up air make my kitchen cold in winter?

It can if it’s not planned well. Placement, filtration, and whether the air is tempered all affect comfort. This is why HVAC coordination is important.

Does make-up air add a lot of cost?

Cost varies widely depending on system type and complexity. The biggest cost driver is when it’s discovered late. Planning early usually keeps the solution simpler.

Related Kitchen Planning Resources

Appliances & Ventilation Range Hood CFM Guide Planning Checklist Contact Us

Want a Make-Up Air + HVAC Coordination Review?

Make-up air doesn’t have to be confusing—or discovered at the last minute. The Fortress Builders coordinates kitchen ventilation, make-up air planning, and HVAC integration early so your kitchen performs the way it should.

Request a Design Consult Explore Kitchen Remodeling

We’ll help you select the right hood, plan a clean duct path, and confirm make-up air needs before the build is underway.