Heat Pump vs Furnace
Running cost, install cost and capacity at design temperature, side by side.
HSPF2 vs AFUE
Equipment comparisons
Two dials, one table, and a stated pick. Running costs are computed from the same energy prices everywhere on the site, so two comparisons cannot disagree with each other.
All comparisons
Gas vs Electric Furnace
Fuel cost per delivered BTU, install cost and lifespan.
$/MMBtu
Two-Stage vs Single-Stage Furnace
Comfort, cycling and the price gap that decides it.
stages · CFM
Ductless vs Central Air
Install cost, efficiency and zoning, for a house that has ducts and one that doesn't.
SEER2 · $/zone
MERV 8 vs MERV 13
Capture rate against pressure drop — what a MERV 13 costs your blower.
MERV · in. w.c.
ERV vs HRV
Heat recovery with and without moisture transfer, by climate zone.
% recovery
Heating
3 comparisons · 3 tools
Cooling
1 comparisons · 3 tools
Service & Costs
2 comparisons · 4 tools