Learn / Climate guides

A field guide to buying fresh air

Your weather changes
the shopping list.

A snowy night in Maine. A muggy afternoon in Georgia. The same need for fresh air, with different questions to ask before you buy.

What feels like home?

Choose the closest pattern. These are starting points, not code zones.

Great Lakes · New England · northern interiors

Shop for the coldest night.

Winter humidity helps decide which core to compare. The frost-control sequence tells you what happens when the weather gets serious.

A blue pencil illustration of a New England-style house surrounded by snow and bare trees.

What moves up your shopping list

  1. The right core

    Compare HRV and ERV options against your indoor humidity and condensation history.

  2. Air during defrost

    Ask how the exact model changes outdoor airflow during frost protection.

  3. A winter-ready install

    Get the drain, preheater, intake location and snow clearance in the scope.

Take this question to the installer

“What happens to bedroom fresh-air delivery during a cold snap?”

Read this climate guide

Explore the field guides

Live between two patterns? Read both. Indoor humidity, your heating and cooling, and the route to the bedroom help narrow the answer.

Cold & snowy

Shop for the coldest night.

Great Lakes · New England · northern interiors

Dry & mountainous

Keep fresh air. Lose less moisture.

Denver · Front Range · dry high-country homes

Hot & humid

Plan for the day the AC barely runs.

Gulf Coast · Southeast · humid coastal homes

Four distinct seasons

Ask for two seasons in one quote.

Mid-Atlantic · many interior and transition regions

Hot & dry

Start with how your home cools.

Phoenix · Las Vegas · desert Southwest

Cool & coastal

Give the closed bedroom a route.

Seattle · Portland · coastal Pacific Northwest

Your house gets the final say.

Bring a few nights of CO₂ readings, an indoor humidity record, and a description of your existing heating and cooling. Ask the installer to explain the exact model, airflow, controls and installation scope using local design conditions.

Compare quotes fairlyStart with HRV vs ERV

These guides help you prepare for a local assessment. Each links to its technical sources; regional examples are not equipment sizing or building-code boundaries.