Publisher stance
Heat Pump System Guide is an independent research publisher. It is not an installer, dealer, utility, testing laboratory, or referral guarantor, and it does not sell or install equipment.
Research boundary
Recommendations stay conditional on exact equipment evidence, local conditions, and confirmation by a qualified professional. Where a spec, price, or credential is not documented, it is marked unknown rather than estimated.
Monetization boundary
The site may earn from affiliate links and paid directory listings. Those relationships are disclosed and never change a review conclusion, a comparison result, or an installer's placement.