Homeowners
Plain-language cost guides for homeowners: repair versus replace, running costs by state, safety, and how to read an HVAC contractor’s quote.
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Boiler vs Furnace: Efficiency Rules, Installed Cost, Lifespan and Cost of Heat
A furnace heats air; a boiler heats water. How the two compare on federal efficiency minimums, EIA-modelled installed cost, DOE lifetimes and fuel cost per million Btu, plus…
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Static Pressure in HVAC: What It Should Be, How to Measure It, How to Fix It
Most home HVAC equipment is rated at 0.50 in. w.c. of total external static pressure. Here is where that number comes from, how to measure TESP with a…
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Heat Pump Rebates in 2026: What Still Pays After the Tax Credit Ended
The federal heat pump tax credit ended with 2025, but utility rebates and state IRA programs still pay. We read the statute, DOE’s May 2026 rule change and…
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HVAC Dampers: Types, How to Tell Open From Closed, and When Bypass Is Needed
HVAC dampers set, switch or block airflow in ductwork. Here are the six types, how to read a damper handle, seasonal settings for two-story homes, and what Honeywell,…
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Furnace Vent Pipe Rules: PVC vs B Vent, Slope and Termination Clearances
Which furnace vent pipe your furnace needs, from Type B vent to manual-named PVC, with the 1/4 inch slope rule, Table 503.8 clearances and the orphaned water heater…
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Outdoor Wood Boiler: How It Works, EPA Step 2 Rules, State Limits and Cost to Run
How an outdoor wood boiler works, what EPA’s Step 2 limit requires, how New York, Massachusetts and Wisconsin restrict siting, and the cordwood price that matches oil and…
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Fan On vs Auto: What the Thermostat Fan Setting Costs and Does to Humidity
AUTO suits most homes. Running the fan ON costs about $67 a month with an older PSC blower at July 2026 US prices and re-evaporates coil moisture in…
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Mobile Home Furnace: HUD Code Rules, the 2028 Efficiency Floor and Replacement
A mobile home furnace is a direct vent furnace listed for manufactured homes. Here are the HUD Code rules, the 95% AFUE floor from December 2028, and a…
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Circulator Pump: How It Works, Sizing Math, ECM Rules and Failure Signs
How a boiler circulator pump works, how to size one with GPM = Btu/h ÷ (500 × ΔT), what Taco and Grundfos data show on watts, and what…
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Window Heat Pump: How It Works, Cold Weather Specs and What It Costs to Run
A window heat pump heats and cools from one 120 V plug. We compare Midea and Gradient cold weather specs, the NYCHA pilot results, DOE ratings and the…