Derek Holloway, Author at HVAC Size Calc - Free HVAC Load Calculators

Complete Guide to HVAC Tax Credits & Rebates by State 2026

Federal tax credits up to $3,600 and state-specific rebates can significantly reduce your HVAC system costs in 2026. Eligibility varies […]

An oversized air conditioning unit won’t cool your home better—it’ll actually work against you. When your AC system is too

Retrofitting an HVAC system in an older home requires careful sizing to account for outdated insulation, ductwork, and thermal characteristics

SEER2 is the updated efficiency rating system that replaced SEER in 2023, measuring air conditioner performance under more realistic conditions.

Finding the right portable AC unit means matching its cooling capacity to your room size—and that’s where BTU calculations become

Oversizing or undersizing your HVAC system is one of the costliest mistakes homeowners make, often resulting in energy bills 15-25%

An expansion valve is the unsung hero of your air conditioning system, precisely regulating refrigerant flow to maintain optimal cooling

Winter heating demands can catch homeowners off guard—especially when your furnace or heat pump hasn’t been serviced since last season.

When Is the Best Time to Buy a New HVAC System? Timing Your Purchase for Maximum Savings The best time

Ceiling cassette heat pumps deliver efficient heating and cooling directly from your ceiling, making them ideal for both commercial offices