Arizona HVAC Pros
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Furnace Installation in Eagar, AZ

A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Apache County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An unfinished basement containing a gray HVAC furnace with ductwork, exposed wooden joists, a concrete floor, and miscellaneous clutter in one corner.

Eight months of heat, down to 20 degrees

Eagar needs a working furnace from October through May, eight months of the year. Winter nights average 20°F, and a furnace built for a milder climate won't keep up with that kind of cold for that long.

Most homes in the area heat with wood, but any gas furnace installed here has to meet the federal minimum of 80 percent AFUE if it was built after November 2015. At 20°F, sizing and installation matter as much as the unit itself. A furnace that's undersized or poorly installed will run hard all winter and still struggle to keep the house warm.

8 months
October through May, your furnace is on duty
20°F
the average winter night it heats against
80% AFUE
the federal minimum any new unit must meet
Isometric cutaway illustration of a single-story house showing interior rooms with furniture, a furnace unit connected to ducting and vertical flue pipes running through the roof.
Your furnace works hardest from November through March.

NOAA nClimDiv, 1991–2020 normals

Arizona requires HVAC contractors to hold a state license.

The state license is issued to the contractor, not to the job. Arizona's Registrar of Contractors tests and records the person or business before they can take on work like this, but the license itself does not follow the furnace into your house. It is a record of who is allowed to do the work, not a check on any single installation.

That check comes from your local building office. A furnace installation in most cities and counties needs a permit before the work starts and an inspection after it is done, and that inspection is what confirms the gas connection and venting were done right on this job, in this house. The license tells you the contractor is on record with the state. The permit and inspection are what look at the work itself.

Sources: Arizona State Legislature · Arizona Registrar of Contractors

What size furnace does my house need?
The right size depends on your home's square footage, insulation, ceiling height, window count, and layout, so there's no single number that works for every house. A furnace that's too big will short cycle and wear out faster. One that's too small will run constantly and still leave rooms cold when it's 20°F outside. A contractor will run a load calculation on your specific house before recommending a size, and with winter lows here averaging 20°F, getting that number right matters more than guessing.
How do I know it's time to replace my furnace?
If your furnace is old enough that parts are getting hard to find, or it's needed more than one repair in the last year or two, replacement is worth considering. Watch for uneven heat between rooms, a furnace that runs longer than it used to, or a rising gas bill with no other explanation. Since homes here need heat from October through May, eight months out of the year, a furnace that's struggling isn't a small inconvenience. If yours is showing these signs, a contractor can tell you whether it's worth repairing again or time to replace it.
Is a high-efficiency furnace worth it?
It depends on how much you heat and what you're replacing. Every non-weatherized gas furnace made since November 2015 has to hit at least 80 percent AFUE, so even a standard new furnace wastes less fuel than an older one might. A high-efficiency model pulls more heat out of the same amount of fuel than that baseline, which matters more in a place like this where heat runs eight months of the year. A contractor can walk through the options and the tradeoffs for your specific house.