AC installation guides

Start here

Pick the situation closest to yours and read the pages in order. Each path is short on purpose: the guides link onward when a question needs more. Prices live in one place, the cost guide, where every range carries its source and date. For one-paragraph answers, start with the AC installation FAQ.

This site is an independent publisher, not an HVAC contractor. The guides explain decisions and the rules behind them; they do not replace a contractor's assessment of your house.

Choosing a system

Start here if the question is which kind of system to install, not who installs it. Most Dallas–Fort Worth houses pair a central AC with a gas furnace in the attic, so the first fork is whether to replace like for like or switch to a heat pump that does both jobs.

The heat pump guide compares running on electricity against gas for North Texas winters. The ductwork guide is for houses without ducts, or with ducts too poor to reuse, and weighs a ducted system against ductless mini-splits. The refrigerant guide explains what R-410A, R-454B and R-32 mean on a quote, and why the choice can affect price and service later. The SEER2 guide sets out the efficiency floor a Texas install must meet and how it differs from ENERGY STAR and utility thresholds.

Sizing and comfort

The sizing guides answer how big the system should be and why some rooms stay hot. Size drives both the price and how the house feels, and square footage alone is a rough check, not a method.

Read the sizing guide first: it explains the Manual J load calculation and what to ask a contractor about it. The oversized-AC guide covers what goes wrong when a unit is too large, such as short cycling and humidity. The hot-and-cold-rooms guide is for uneven cooling, where the cause is often ducts, insulation or windows rather than the equipment.

Replacement

For a system that is failing or getting old. The repair-or-replace guide sets out the factors that decide it, including age, refrigerant and repair history, without pretending one number answers it.

Once replacing, the install-day guide explains what happens, how to prepare the attic and yard, and how long a typical change-out takes. The older-homes guide covers what a pre-1990s Dallas-area house tends to add to the job: duct repairs, electrical updates and coil or furnace compatibility. Two guides cover partial versus whole replacements: whether to replace the furnace with the AC, and whether a leaking coil justifies a coil-only repair.

Contracts and quotes

Use these between the first quote and the signature. The questions guide is the list to take to each visit, so every contractor answers the same things and the quotes can be compared.

The contract checklist covers what Texas rules expect on paper, such as the TDLR license number and consumer notice, plus the scope, warranty and payment terms worth writing in. Pair both with the quote comparison tool, which lines quotes up item by item. The paying guide covers cash versus financed prices, deferred interest and the Texas rules on liens and cancellation.

After the install

The last step is checking the work before the final payment. The inspection guide walks through what to look at on install day and in the first weeks: the permit inspection, model numbers against the contract, the drain and float switch, airflow, thermostat settings and warranty registration.

Questions

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