Indoor Air Quality in Jackson, MS

Yes — but there are two kinds of testing, and they answer different questions.

• Laboratory air sampling is what an environmental lab or mold inspector does: collect samples, report what is present. If you need a contaminant identified, that is the right tool, and we will tell you when to call one.
• HVAC performance testing is what we do — total external static pressure on a manometer, airflow across the coil in CFM, temperature rise and split, duct leakage as a percentage, relative humidity against dew point. Instead of naming what is in the air, it tells you how it gets there.

The report identifies; the readings explain the mechanism and point to the correction. Most Jackson homeowners who think they need the first need the second first.

We do not publish pricing, and we would gently push back on the question anyway — not to dodge it, but because "test the air" is not one service, and which one you mean changes what you should be buying.

A laboratory sample tells you what is present. It does not tell you whether your return is leaking, whether your coil is starved of airflow, or whether your system is delivering the capacity on its data plate. Homeowners regularly pay for the identification and then pay again to find the mechanism — and the mechanism is the fixable part.

Our diagnostic starts on the equipment, because that is where the changeable variables live. You get the readings in writing and a recommendation tied to a specific measurement. Call 601-966-4601 during our posted hours and we will tell you plainly what the visit involves.

It is worth it when the result changes a decision. That is the whole test.

Performance testing routinely reverses the plan. Homeowners come to us expecting to buy a purifier and leave having sealed a return. Others have been quoted a larger system for a house that is already oversized, and it is the static pressure and airflow readings — not an opinion — that show it.

Where testing is not worth it: when it is a formality, produces a number nobody acts on, or is bundled into a visit whose recommendation was decided before anyone arrived. Ask what will be measured, with what instrument, and whether you get the readings afterward. If the answers are vague, the test is decoration.

Nobody — including us — can tell you from your square footage, and that it gets answered that way constantly is one of the larger quiet problems in this trade.

The correct method is a Manual J load calculation: the industry-standard procedure that works out your home's actual heating and cooling load from orientation, window area and glazing, insulation, ceiling heights, duct location, infiltration, and local design conditions. Two houses of identical square footage on the same Jackson street can carry meaningfully different loads. Manual D duct design then sizes the distribution to carry that load to each room.

Rules of thumb overshoot, and an oversized system is a moisture problem rather than a margin of safety: it satisfies the thermostat fast, short-cycles, and never runs long enough at a wet coil to strip humidity from the air. That is the classic Mississippi complaint of a house that is cold and still clammy, and more capacity makes it worse.

Because in most Jackson homes the dust is not walking in the front door. It is being drawn in by the system and distributed by it. There are three mechanical causes, and readings distinguish them in one visit.

• Return-side leakage. The return is under negative pressure, so every unsealed seam, open boot, and panned joist cavity actively pulls attic dust and insulation fiber into the airstream. The Department of Energy has measured duct leakage in 90–100% of homes tested; we express yours as a percentage.
• Filter bypass. A filter that does not seal to its frame lets air slip around it, and air takes the low-resistance path — so a poorly fitted high-efficiency filter can capture less than a well-sealed basic one.
• High static pressure. A restricted system moves air at higher velocity through whatever paths remain open, keeping fine particulate entrained instead of letting it settle where you can vacuum it.

All three show up in the numbers. None are fixed by a purifier.

A dehumidifier passes air across a coil held below its dew point so moisture condenses out and drains away, then returns the drier air to the house. Unlike your air conditioner it targets moisture directly rather than as a side effect of removing heat — which is why it matters here. Air conditioning only dehumidifies while it runs, so through Jackson's long shoulder seasons, when the sensible load is too small to make the system run much, humidity climbs with the thermostat perfectly satisfied. A whole-home dehumidifier carries that latent load independently and lets us hold a relative humidity setpoint below 50%.

A humidifier does the reverse, adding moisture to air that is too dry: a real need through long northern heating seasons, an uncommon one in central Mississippi.

Before either, we measure. If humidity is high because airflow is wrong or the system is oversized and short-cycling, a dehumidifier is compensating for something correctable.

A less satisfying answer than the ads give: the right first move is almost never a device. It is establishing what your system is doing.

Filtration is where the real gains usually sit, and the trade-off is what gets left out. Higher-efficiency media carries higher pressure drop, and a system already above its rated static pressure loses airflow to a heavy filter in an undersized slot. Since a filter only captures air that genuinely passes through it, more filter in the wrong cabinet often means less filtration in practice.

Coil-mounted UV lamps have a defensible mechanical role — keeping a permanently wet coil and drain pan clear of the growth that accumulates through a Mississippi summer, which protects airflow. We attach no health claim to one, and we would be cautious with anyone who does. Purifiers act on the air that reaches them, and how much of your air that is depends on airflow and duct integrity.

So: measure, correct the airflow and the leakage, then choose equipment against a known baseline. In that order it is an investment. In the other order it is a hope.

Both are possible, and which you get depends on the unit and the sizing — which is why this is not a product decision.

The EPA reports indoor concentrations of some pollutants commonly running two to five times higher than typical outdoor concentrations, and the mechanical response to concentration is dilution with measured outdoor air. A heat recovery ventilator (HRV) exchanges heat between the incoming and outgoing streams but not moisture. An energy recovery ventilator (ERV) transfers both — the distinction that matters in central Mississippi, because July outdoor air arrives at a dew point in the low-to-mid seventies and an HRV would import that latent load nearly intact.

Sizing depends on the house's air-change behavior and latent load — the Manual J load calculation again. A ventilator specified without that arithmetic is as likely to add a humidity problem as to solve an air quality one.