Decision suite / six tools
Start with the decision in front of you.
Each tool keeps the assumptions visible, uses deterministic math, and stops short of pretending to diagnose your home.
Repair or replace
Weigh age, repair burden, reliability, comfort, safety, and your ownership horizon.
Check contractor quotes
Compare price and scope side by side, then surface the questions that still need answers.
Compare HVAC systems
Put heat pump, furnace, and dual-fuel scenarios on one transparent lifecycle-cost frame.
Choose a water heater
Compare tank, heat-pump, and tankless choices with cost and installation dependencies visible.
Find incentive sources
Start with current official programs and a verification checklist before counting any incentive.
Plan equipment lifespans
Keep a private, device-local inventory and see which systems deserve research before urgency arrives.
Use every core workflow without creating a profile.
The same inputs produce the same numeric result.
Calculations do not rank or sell service providers.
Professional diagnosis and sizing stay where they belong.