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Properly sized, permit-ready HVAC installs backed by Manual J load calculations. We match the right system to your home so you get maximum efficiency and comfort from day one.
HVAC Installation Specialists
Every call we take about a struggling new system tells the same story: the equipment was fine, but the installation was not. In Oklahoma City, Oklahoma City, OK, we have seen brand-new units running at 60 percent of their rated efficiency within the first season because nobody did the math before the install day. That math is Manual J load calculation, and it is the foundation of everything we do at All Year HVAC.
Manual J is a room-by-room heat gain and heat loss analysis that accounts for your home's square footage, ceiling height, insulation values, window orientation, local climate data, and even the number of people who live there. When a system is undersized, it runs constantly without ever reaching setpoint, wearing out components ahead of schedule. When it is oversized, it short-cycles. It brings the temperature down fast, shuts off, and never runs long enough to pull meaningful humidity from the air. In Oklahoma City, OK's climate, short-cycling during humid months means sticky, uncomfortable indoor air even when the thermostat reads 72 degrees.
After load calculation, we move to ductwork design. If you are replacing an old system, we walk every run with a static pressure gauge. Undersized return ducts are the single most common duct problem we find in Oklahoma City homes, and they strangle airflow across the entire system regardless of how good the equipment is. Where duct modifications are needed, we handle them as part of the install scope, not as an afterthought you discover during the first cooling season.
Brand selection is next, and we are not brand-loyal. We carry multiple manufacturer lines precisely so we can match the equipment to your application. A single-stage system may be perfectly appropriate for a smaller home with stable loads. A variable-speed inverter system makes sense in larger square footage where load varies significantly through the day. We walk you through SEER2 ratings in plain terms, show you the payback math on the efficiency upgrade, and let you make an informed decision rather than upselling you into equipment that does not suit your usage pattern.
Every install we complete in Oklahoma City, OK is permit-ready. That means we pull the required mechanical permit, schedule the inspection, and hand you a completed permit card at the end. This matters when you sell the home, when you file an insurance claim after storm damage, and when you call the manufacturer on a warranty claim. We also handle warranty registration on your behalf, because a registration that never gets filed is a warranty that does not exist when you need it.
What We Install
Full split-system installations including indoor air handler, outdoor condensing unit, refrigerant line sets, electrical disconnect, and thermostat wiring. We handle complete load calculations before equipment selection and ensure proper refrigerant charge per manufacturer specs on startup. Every central system we install is sized against Manual J findings, not rule-of-thumb guesses.
Replacing an aging R-22 or early R-410A system with a SEER2-rated high-efficiency unit is one of the highest-return home improvements available in Oklahoma City, OK. We calculate your current system's actual operating cost, model the savings with the upgraded equipment, and show you the payback timeline before you commit. Variable-speed compressors and ECM blower motors dramatically reduce electricity consumption while improving humidity control in the process.
New construction and full-replacement installs require properly designed duct systems. We calculate supply and return sizing using Manual D methodology, fabricate custom trunk lines and branch takeoffs where needed, and verify static pressure at the air handler before startup. Oversized or undersized duct sections defeat even the best equipment. When we design the duct system as part of your installation, the whole system performs as rated.
We are an authorized dealer for multiple major equipment lines, which means we recommend based on application fit rather than margin. Some brands excel in reliability for basic single-stage applications. Others offer the best variable-speed technology or the most robust warranty terms. In Oklahoma City's climate, we will walk you through which manufacturer tiers make sense for your home's specific load profile, budget, and long-term ownership plans.
Every installation we complete in Oklahoma City, OK goes through the proper permitting process. We pull the mechanical permit, schedule the inspection with the local authority having jurisdiction, and make sure the work is done to code before the inspector arrives. You receive the permit card and inspection approval as part of your installation package. Unpermitted HVAC work can create problems when you refinance, sell, or file an insurance claim, and we eliminate that risk entirely.
Manufacturer warranties on HVAC equipment require proper registration, often within 60 to 90 days of installation, and many require that the install was performed by a licensed contractor. We handle registration on your behalf, using the serial numbers recorded at startup. We also complete a full commissioning checklist at startup: verifying refrigerant charge, measuring supply and return temperatures, confirming airflow, and checking electrical draws against nameplate specs before we call the job complete.
Our Difference
Every system we install is sized using Manual J before we ever open a catalog. This prevents the short-cycling and under-cooling that plague oversized and undersized installs throughout Oklahoma City, OK.
We carry multiple equipment lines so our recommendation is based on your home's needs, not our distributor relationship. You get the system that actually fits, not the one we happen to stock most.
We pull the permit, complete the work to code, schedule the inspection, and hand you documentation at project closeout. You never have to wonder if your installation is above board in Oklahoma City.
We file your manufacturer warranty registration the same day the system goes live. You get confirmation with your closeout paperwork so the warranty is active from the moment you start using the system.
Our Process
We visit your home, measure every conditioned space, inspect existing ductwork, and run a full Manual J load calculation. This determines the correct equipment capacity before anything else happens.
We present equipment options matched to your load calculation, explain SEER2 ratings and payback timelines, and outline any duct modifications needed for proper airflow. No pressure, just information.
We submit the permit application, schedule the install date, and complete all mechanical, refrigerant, and electrical work to code. The job site is cleaned before we leave.
We run the full startup checklist, verify refrigerant charge and airflow, file your warranty registration, pass the inspection, and hand you your permit card and system documentation.
Customer Reviews
"The tech actually came in with a calculator and did the load calculation before he said a word about equipment. That impressed me immediately. Previous quotes I got were just the guy looking at my old unit and saying 'same size should work.' All Year HVAC sized it correctly, pulled the permit, and passed inspection first try."
"We upgraded from a 10-year-old R-22 system to a 20 SEER2 variable speed unit. They showed us the payback calculation, handled the utility rebate paperwork, and registered the warranty the same day it was installed. The difference in electricity bills has been significant. Highly recommend for anyone in Oklahoma City, OK considering an upgrade."
"Needed a full new system in a home I just bought. They found that the existing ductwork had severe undersized return air. Instead of ignoring it like the previous owner clearly had, they fixed it as part of the installation scope. The system runs quietly and the house actually reaches setpoint now. Worth every penny."
Common Questions
Service Area
Our HVAC installation crews serve Oklahoma City and the surrounding communities throughout Oklahoma City, OK. Whether you are in the city center or in the surrounding suburbs, we pull local permits, meet local code requirements, and know the inspection process for your specific jurisdiction.
We schedule installations Monday through Saturday and offer priority scheduling for households without working HVAC during extreme temperature periods. Call us to confirm availability in your specific area of Oklahoma City, OK.
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Call All Year HVAC for a free site assessment and Manual J calculation. No guessing, no oversizing, no shortcuts.
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