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Tellez Heating and Air

Learning Center

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Honest, plain-English HVAC answers for Tulsa-area homeowners — organized the way you actually shop: learn the basics, compare your options, then take the next step.

  • Licensed #0061973 · Bonded & Insured
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Glossary · HVAC terms defined

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AFUE
A furnace's heating-efficiency rating. The higher it is, the more of the fuel you buy ends up as heat in your home.
SEER2
The rating used to compare cooling efficiency between air conditioners and heat pumps. Higher is more efficient.
HSPF2
The same idea as SEER2, but for how efficiently a heat pump heats.
Heat pump
An all-electric system that moves heat rather than burning fuel, so it both heats and cools a home.
Tonnage
A measure of how much cooling capacity a system has. Bigger is not automatically better — it has to match the house.
BTU
The standard unit for measuring heating or cooling energy.
MERV
An air-filter rating. A higher MERV filter captures smaller particles, but also restricts airflow more.
Manual J
The load calculation used to size equipment for your specific home rather than guessing from square footage.
Variable-speed
A compressor or blower that adjusts its output instead of simply switching on and off, for steadier temperatures.
Air handler
The indoor unit that moves conditioned air through your ductwork.

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