Research, drawn together
One answer,
from many threads.
Most tools hand you a wall of text and leave you to sort it out. This one reads across sources, works out where they agree and where they don’t, and gives you the answer with its threads still showing.
Heat pumps stay efficient well below freezing — modern cold-climate units hold a COP above 2 at −15 °C. The older “stops working in winter” figure comes from equipment two decades out of date.
Threads it drew on
- 1Field study, cold-climate performance
- 2Manufacturer rating tables
- 3Utility retrofit report
Five ways to pull a thread
Searches, reads, and pulls what it finds into a single answer — with the sources kept in view underneath.
Takes a tangled topic apart and lays the pieces out in order, defining terms as it goes.
Three sentences, no preamble. For when you want the answer and nothing around it.
Puts options next to each other on the criteria that matter, and names the trade-off each one makes.
Takes a claim and checks whether it holds, partly holds, or falls apart.
Stop stitching answers together by hand.