# plainhvac

> Straight answers on heat pumps, mini-splits and what they cost to run


## Pages

- [Legal notice](https://plainhvac.com/legal-notice/)
- [Home heating and cooling, explained](https://plainhvac.com/home-heating-and-cooling-explained/)
- [Contact](https://plainhvac.com/contact/)
- [About](https://plainhvac.com/about/)
- [Advertising Disclosure](https://plainhvac.com/advertising-disclosure/)
- [Safety and Scope](https://plainhvac.com/safety/)
- [Editorial Standards and How We Test](https://plainhvac.com/how-we-test/)
- [Privacy Policy](https://plainhvac.com/privacy-policy/)



## Posts

- [Thermostat Placement: What Your Sensor Is Really Measuring](https://plainhvac.com/central-hvac/thermostat-placement/)
- [Heat Pump Short Cycling: The Five Free Checks to Make First](https://plainhvac.com/heat-pumps/heat-pump-short-cycling/)
- [House Humid With the AC Running? Cold Is Not the Same as Dry](https://plainhvac.com/indoor-air/humid-with-ac-running/)
- [Heat Pump Blowing Cool Air: When That Is Normal and When It Is Not](https://plainhvac.com/heat-pumps/heat-pump-blowing-cool-air/)
- [Not Enough Return Air: Four Tests You Can Do Today](https://plainhvac.com/central-hvac/not-enough-return-air/)
- [Do Duct Booster Fans Work? What They Move and What They Cannot](https://plainhvac.com/central-hvac/duct-booster-fan/)
- [Will a MERV 13 Filter Choke Your System? It Depends on Two Things](https://plainhvac.com/indoor-air/merv-13-filter-airflow/)
- [Heat Pump Auxiliary Heat: Why It Runs So Much, and When to Worry](https://plainhvac.com/heat-pumps/heat-pump-auxiliary-heat/)
- [Whole House Dehumidifier vs Portable: Which One Your Basement Needs](https://plainhvac.com/indoor-air/whole-house-dehumidifier-vs-portable/)
- [Duct Sealing: Which Ducts You Can Seal Yourself, and Which Ones You Cannot](https://plainhvac.com/insulation/duct-sealing-yourself/)
- [Extended HVAC Warranty: What You Are Actually Being Sold](https://plainhvac.com/central-hvac/extended-hvac-warranty/)
- [How to Find Air Leaks Without a Blower Door Test](https://plainhvac.com/insulation/find-air-leaks-without-blower-door/)
- [Dual Fuel Switchover Temperature: The Default Is Probably Wrong](https://plainhvac.com/running-costs/dual-fuel-switchover-temperature/)
- [Zoning a Single-Stage System: Why the Bypass Damper Is Not a Fix](https://plainhvac.com/central-hvac/zoning-single-stage-hvac/)
- [120V Mini Split: What It Solves and What It Does Not](https://plainhvac.com/mini-splits/120v-mini-split/)
- [Mini-Split Standby Power: Why Nobody Agrees What It Costs](https://plainhvac.com/running-costs/mini-split-standby-power/)
- [Mini-Split Line Set Length: The Four Limits and Why They Exist](https://plainhvac.com/mini-splits/mini-split-line-set-length/)
- [DIY Mini-Split Installation: What You Can and Cannot Legally Do](https://plainhvac.com/mini-splits/diy-mini-split-installation-legal/)
- [Are Budget Mini-Split Brands Worth It? What You Actually Give Up](https://plainhvac.com/mini-splits/budget-mini-split-brands/)
- [Heat Pump Outdoor Unit Noise: What Each Sound Means](https://plainhvac.com/troubleshooting/heat-pump-outdoor-unit-noise/)
- [Where to Mount a Mini-Split Head: The Constraints That Decide It](https://plainhvac.com/mini-splits/where-to-mount-mini-split-head/)
- [Mini-Split Smells Musty: How to Deep Clean the Blower Wheel](https://plainhvac.com/troubleshooting/mini-split-musty-smell/)