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Kōōihaus™ vs Age by Serial Number

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Kōōihaus™ compared with Age by Serial Number
DetailKōōihaus™ logo Kōōihaus™Age by Serial Number logo Age by Serial Number
What it doesFree paint coverage calculator for interior and exterior painting projects Find how old a water heater, furnace or air conditioner is from its serial number
StageEstablished Not given
Founded2021 Not given
Based inUS Not given
Pricing modelFree Free
PricingNot given Not given
Key features
  • Interior paint calculator
  • Exterior paint calculator
  • Metric and imperial units
  • Primer calculation option
  • Ceiling painting option
  • Gable area calculation for exterior
  • Instant results display
  • Water heater serial number decoders for Bradford White, A.O. Smith, State, American, Whirlpool, Rheem, Ruud, Lochinvar
  • Furnace and air conditioner decoders for Goodman, Amana, Lennox, Carrier, Trane, American Standard
  • Water heater and furnace error code lookups
  • Water heater sizing calculator for tank and tankless models
  • Rheem water heater status light meanings
  • Goodman furnace LED flash code reference
  • Rinnai V53De tankless water heater code lookup
  • Rheem tankless water heater code lookup
What makes it different
  • Handles complex calculations like doors, windows, and multiple stories automatically
  • Works for both interior and exterior projects
  • Independent reference not affiliated with or endorsed by any manufacturer
  • Distinguishes manufacture date from installation date and emphasizes condition and maintenance over age
  • Covers safety guidance including gas smell warnings and professional contractor recommendations
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)21 +1 (up) since last check1 no change since last check
Trust Flow (Majestic)41
Citation Flow (Majestic)2317
Referring domains (Majestic)374

4 details filled in for both companies.

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