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Tools & Home Improvement

Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White

Tools & Home Improvement4.5· 700 Amazon ratings

Bias-adjusted across 700 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Tools & Home Improvement.

81.5%
Percentile · Global
76.6%
Percentile · Cohort
Tools & Home Improvement
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Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White

How the score was built

Amazon ratings
700

used for the Bayesian percentile

Raw star average
4.5 / 5

unadjusted Amazon mean

Bayesian avg
4.47

raw rating shrunk to the category prior

Reviewer-graph z
-0.500

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Tools & Home Improvement

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