Maintenance & Repair
Indoor Humidity and Mold: Find the Moisture Source First
Control water, ventilation and cooling before treating visible growth.
7 min readBuiltVitals library
Building systems blog
Practical, carefully sourced guides to HVAC, home systems, energy, maintenance, and repair.
HVAC & Cooling
R-32, R-454B and R-410A: What Homeowners Should Know
A practical 2026 guide to new air-conditioning refrigerants and compatible equipment.
6 min read
Home Systems
Heat Pump Water Heater vs. Standard Electric: A Real-Home Guide
Compare savings, space, noise, climate and recovery before replacing a water heater.
8 min read
Home Systems
Whole-Home Surge Protection: What It Can and Cannot Do
Understand service-panel protection, point-of-use devices, grounding and lightning limits.
8 min read
Energy & Efficiency
Air Sealing or Insulation First? How to Prioritize
Use an energy audit, moisture control and climate to sequence envelope upgrades.
6 min read
Maintenance & Repair
Spring and Fall HVAC Maintenance Checklist: Homeowner Tasks vs. Professional Service
A practical spring-and-fall HVAC checklist that separates safe homeowner maintenance from measurements and repairs that belong with a qualified professional.
6 min read
HVAC & Cooling
Why Is My Air Conditioner Freezing Up? Safe First Checks and When to Call a Pro
Ice on an AC usually points to an airflow or refrigerant-system problem. Follow these safe first checks, learn what not to do, and know when to stop and call a professional.
6 min read
Energy & Efficiency
Heat Pump vs. Gas Furnace: How to Compare Comfort, Cost, and Climate
A practical, house-specific comparison of air-source heat pumps and gas furnaces—including cold-weather performance, operating cost, comfort, and dual-fuel options.
7 min read