Question 1

Which is better, Honeywell Home T9 Smart Thermostat or Honeywell HPA300 True HEPA Air Purifier?

Accepted Answer

Based on our testing, the Honeywell Home T9 Smart Thermostat scores higher overall at 8.6/10. The Honeywell Home T9 Smart Thermostat scored 8.6/10 and the Honeywell HPA300 True HEPA Air Purifier scored 8.5/10 in our Best Honeywell Home Products 2026 evaluation.

Question 2

Is the Honeywell Home T9 Smart Thermostat worth it over the Honeywell HPA300 True HEPA Air Purifier?

Accepted Answer

The Honeywell Home T9 Smart Thermostat scores 8.6/10 while the Honeywell HPA300 True HEPA Air Purifier scores 8.5/10. The Honeywell Home T9 Smart Thermostat is our "Best Smart Thermostat" pick in the Best Honeywell Home Products 2026 category.

Honeywell Home T9 Smart Thermostat vs Honeywell HPA300 True HEPA Air Purifier: Which to Buy?