How this equipment actually works.

How a Heat Pump Actually Works

A heat pump is the most misunderstood piece of equipment in most Maryland homes. It does not make heat, it moves it, and almost everything people find strange about one (cool air at the vent, steam off the outdoor unit, a January electric bill) follows directly from that single fact.

SEER2, HSPF2 and AFUE Ratings Explained

Every quote you get will have efficiency numbers on it, and most of them are explained badly. Here is what each rating actually measures, why the test conditions matter, and how to compare two proposals honestly instead of just picking the bigger number.

Why a Bigger Air Conditioner Is Not a Better One

Bigger equipment does not buy better comfort. A system sized past what your house actually needs runs in short bursts, leaves rooms uneven, removes very little moisture from the air and wears itself out early. Here is how sizing is supposed to be determined, and what to ask for.

Repair or Replace: A Straight Framework for Deciding

Nobody enjoys this decision, and it usually arrives on the worst possible day. There is no single formula that answers it, but there are six questions that get you most of the way, and knowing which ones actually matter keeps you from being talked into either extreme.

Humidity and Indoor Air Quality in Maryland

Comfort in a Mid-Atlantic summer is mostly a moisture problem, not a temperature problem. This page explains what dew point is, what humidity range is actually healthy indoors, how your air conditioner dries the air, what MERV ratings mean, and why a tight house needs deliberate fresh air.

Duct Leakage: Why Ductwork Matters as Much as Equipment

You can buy excellent equipment and still have an uncomfortable house, because the ductwork decides where the air actually goes. In a lot of homes a substantial share never arrives. This page explains where it goes, why one room is always wrong, and what you can check yourself.