
Duct Sizing and Static Pressure Basics
Airflow vs duct area, friction rate, total external static pressure, undersized returns, common airflow faults. A practical HVACPool guide for anyone researching duct sizing.
Heating / Ventilation / Air Conditioning
Hvac Pool provides independent guides and a searchable equipment catalogue covering basic to advance categories of heating, ventilation, and cooling. Our information is written specifically to help you ask a contractor better questions instead of trying to sell you a costly technician callout.
HVACPool is an information site. We do not install, service or repair equipment, and we are not a contractor referral network. Specifications are for comparison. We always confirm certified ratings and have a licensed professional size and install your system.
Everything on this site sits under one of three basic categories like heating, ventilation and air conditioning. Pick the one closest to the problem you are trying to solve.
Furnaces, boilers, heat pumps, radiant, baseboard and unit heaters. How fuel type, staging and efficiency ratings actually affect your running costs.
Exhaust fans, whole-house systems, HRVs, ERVs, ductwork and air cleaning. The half of HVAC that decides whether the air is fit to breathe.
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Representative configurations across every category, listed so you can compare capacity, efficiency and staging side by side. Confirm current pricing and certified ratings with the manufacturer or an authorised dealer.
Sizing, efficiency, cost and comparison guides across all three pillars.

Airflow vs duct area, friction rate, total external static pressure, undersized returns, common airflow faults. A practical HVACPool guide for anyone researching duct sizing.

Normal vs abnormal frosting, defrost cycle, keeping the outdoor unit clear, auxiliary heat lockout, snow and drainage. A practical HVACPool guide for anyone researching heat pump winter maintenance.

Evidence on cleaning benefits, when it is justified, sealing vs cleaning, leakage testing, avoiding common upsells. A practical HVACPool guide for anyone researching air duct cleaning.
A reference directory of the companies that make and distribute HVAC equipment — with head office details, contact routes and what each one actually specialises in. We are not a dealer for any of them, and none of them pay to appear.
If you are stuck on a term, the glossary will unstick you. If you know roughly what you need, go straight to the catalogue.