The residential HVAC system should have its size determined on the basis of more than just the square footage of the house or the nominal tonnage given on the unit, with ACCA Manual S being the standard used when selecting and sizing residential heating and cooling equipment after the building's heating and cooling loads have been calculated. A Manual J load calculation is used to establish the amount of heating and cooling that a house requires. Using those load figures toge

If your air conditioner can’t keep the house at a comfortable temperature, or if it seems to run on and off constantly, the problem is usually not with the equipment itself. That’s how big the problem is. Quick answer: An AC unit that's too big for your home cools the air too fast without removing enough humidity, leaving rooms feeling clammy and uneven. Even when working constantly, a unit that is too small won’t be able to meet your thermostat setting during the peak summer

If you're replacing an old system or building a new home in the Phoenix area, one question comes up more than almost any other: What size heat pump do I need? It's a fair question, and the honest answer is: it depends on more than square footage. A heat pump that's too big or too small for your home can leave you uncomfortable, drive up your energy bills, and wear out faster than it should. In this guide, we'll walk through exactly how heat pump sizing works, what goes into a

If you've ever asked a contractor, "What size AC do I need?" and gotten a quick answer based only on your square footage, you're not alone. It's the most common way homes get sized, and it's also one of the biggest reasons homeowners end up with a system that short-cycles, runs constantly, or leaves certain rooms too hot or too cold. The truth is, tonnage isn't a whole-house guess. It's a room-by-room calculation that depends on how much heat each space gains, not just how bi

If you've ever had a contractor size your new HVAC system by looking at your square footage and doing quick math in their head, you've experienced "rule-of-thumb" sizing. It's fast, it's cheap, and it's still one of the most common reasons homeowners end up with a system that never quite feels right. At Heatload, we get asked about this constantly: "Why does my HVAC quote include a Manual J calculation? Isn't square footage enough?" The short answer is no, and the long answer

The “20 SEER2” lab rating is merely a theoretical benchmark. In real-world conditions, actual performance often falls short due to unavoidable variables such as system design mismatches, climate effects, and installation variability.

If you live in Phoenix, you know the drill: triple-digit temps half the year, then chilly mornings in winter. Cranking the AC all day? Not cheap. Blasting heat in December? Still happens in the Valley. That’s why more homeowners across the East Valley, Arcadia, and Laveen are switching to ductless mini split heat pump systems.

Thinking about getting a mini split AC installed in your Phoenix home? Good call. When it hits 110° in the middle of July, and you’re stuck dealing with hot spots or sky-high SRP bills, comfort matters.