Humidity is the job here

Most of the region deals with summer moisture. Transylvania County lives in it. A temperate rainforest climate at about 2,150 feet means that the number on your thermostat is a poor guide to whether your house is actually comfortable — a Brevard house at 74°F can feel clammy, smell musty, and grow things in the corners.

The instinct is to buy a bigger air conditioner. That is precisely wrong. An oversized system cools the air quickly, satisfies the thermostat and shuts off before it has run long enough to pull water out of the air. The house gets cold and stays damp. What actually works here is a right-sized system running long, slow cycles, and where that is not enough, dedicated whole-house dehumidification tied into the system.

The number to aim for

40–50% relative humidity, year round. Above about 60% is where mould, dust mites and that persistent musty smell live. A cheap hygrometer will tell you more about your house than your thermostat will.

Crawl spaces, and what is under your floor

A vented crawl space in this rainfall is a humidity generator sitting directly beneath your living space. If ductwork or a return runs through it — and in a lot of Brevard homes it does — that air is in your house. We frequently find that what gets described as an air quality problem, or a system that "cannot keep up," starts underneath the floor. Sealing ducts, correcting return paths and adding dehumidification usually do more than new equipment would.

Second homes and seasonal properties

Brevard is a retirement and cultural centre, and a lot of houses here sit empty for stretches. A house closed up for a month in a wet climate with the system switched off is how people come back to mould. Leaving cooling set around 80°F, or better, running a humidistat-controlled dehumidifier, costs very little and prevents a lot. We will set a seasonal property up properly and tell you what to leave running.

Elevation and Pisgah

Brevard sits at a similar elevation to Hendersonville but with a different exposure — up against Pisgah National Forest, with the rainfall and the tree cover that go with it. Heavily shaded outdoor units stay damp, collect more leaf litter and rot their pads faster. Keeping eighteen inches clear and the unit up off wet ground matters more here than almost anywhere we work.