Why we audit Atlanta homes in May, not August

Most of the calls we get for energy audits come in July. The thermostat reads 88, the upstairs is 95, the August bill is coming, and the homeowner is standing in their kitchen wondering why they've been paying for an HVAC system that can't keep up. We get it. The pain is real. But by the time the phone rings in July, we're already six weeks late.

Here's the simple version: an audit done in May can produce real comfort improvements before August arrives. An audit done in August produces a report you'll read while you sweat.

A home energy audit at ECS takes two to four hours on-site. We run the blower door to measure how leaky the building envelope is. We use a duct blaster on the HVAC system to find out how much of your cooled air is being dumped into your crawlspace or attic before it ever reaches a vent. We do an infrared thermal scan to see exactly where heat is coming in. We pull a manometer reading on the ductwork. The audit itself is the easy part. The five to six hours of backend work to model your home and prioritize the recommendations — that's where the actual diagnosis lives.

The implementation work is what takes time. Air sealing on an average Atlanta home is usually a one-day job once you can get on the contractor's calendar. Attic insulation is two to three days. Crawl space encapsulation is a week. An HVAC system replacement, properly sized to the home's actual cooling load instead of whatever the previous installer eyeballed, takes two to three weeks from order to install. Add a panel upgrade if you're going heat pump, and you're looking at another two weeks.

Atlanta's HVAC contractors are slammed in July and August. Wait times that run two weeks in May run four to six weeks in mid-summer. Equipment availability dries up. Pricing creeps. Late.

There's a quieter reason we prefer the spring window too. The blower door reads cleaner. When the outdoor temperature and indoor temperature are close — which is the case for most of April and May in Atlanta — the pressure differential is balanced and the data is more reliable. In August, when there's a 30-degree gradient between your living room and your attic, the blower door is still useful, but the noise floor is higher. A spring blower door reading at, say, 1,650 CFM50 is a number you can trust to plan around. A late-July reading is more of an estimate dressed up in a number.

The audit-to-implementation-to-rebate-paperwork chain also has its own clock. Georgia Power's Whole House rebate requires a post-improvement test-out, and the rebate paperwork takes a few weeks to process. Finishing the work in early summer means the rebate check lands before year-end. Starting the work in September means you're chasing paperwork into the holidays.

An audit is like getting a physical on your house. You don't wait until you're in the ER to schedule it. You go when you're feeling fine, find out what's working and what isn't, and fix the items on the list before they start hurting. May is the equivalent of feeling fine. By August, your house is in the ER, and the wait time at the ER is six weeks long.