Showing Posts From
Ventilation
What Is CFM and How to Calculate It
CFM is the volume of air your HVAC system moves per minute. What it means, the 400 CFM per ton rule, the formula to size airflow per room, and how to measure it.
HRV vs ERV: Which Recovery Ventilator Does Your Home Need?
Heat Recovery Ventilators vs Energy Recovery Ventilators — how they work, what each recovers, which climate conditions suit each, and how to size them.
ASHRAE 62.2 Ventilation Requirements: What Your Home Actually Needs
The ASHRAE 62.2 whole-building ventilation formula, why tight construction requires mechanical ventilation, and how to size an HRV, ERV, or exhaust fan to meet the standard.