Do You Need to Upgrade Your HVAC System for a Home Addition?
In most cases, simply tying a couple of flexible ducts into your existing HVAC trunk line will not adequately condition a new room addition and degrades airflow throughout the rest of your home.
Residential HVAC in North Carolina is engineered strictly to match calculated heating and cooling loads. Forcing a system designed for 1,800 sq ft to cool 2,300 sq ft causes continuous compressor run times, high indoor humidity, and uneven temperatures. A formal Manual J load calculation determines whether to zone, upgrade, or install a mini-split.
Why Splicing Ducts Creates System Failure
HVAC blowers push against calibrated static pressure. Splicing ducts drops velocity to existing rooms and creates unconditioned hot and cold spots. Additions also require dedicated return air pathways to prevent positive room pressure from blocking airflow.
The Three Engineered Solutions
AGCS coordinates three proven conditioning paths:
- Ductless Mini-Split Heat Pumps: Wall-mounted or ceiling-cassette inverter heat pumps dedicated to the addition. Independent operation, no attic ductwork, and hyper-efficient variable-speed performance.
- Dedicated Split System: Ideal for additions of 600 to 1,200+ sq ft, providing an independent condenser and ducted system.
- Zoning Existing Equipment: Feasible only if current equipment was oversized originally, utilizing motorized dampers and static pressure bypass controls.
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Call (980) 888-3107 or send us the details of your project. Same-day response during business hours.
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