For homeowners
Know the right size before you sign the quote.
Most HVAC quotes are sized by square footage. An independent Manual J tells you what your house actually needs, so you can compare quotes on equal terms and avoid paying for tonnage you will never use.
Independent
We do not sell or install equipment. The number is the number.
Owner-builders
Building your own home? We provide the Manual J, S and D your permit needs.
Renovations and additions
Finished basements, additions and conversions change the load. We calculate it.
Plain-English answers
Ask anything. Reviews mention our patience with questions as often as our speed.
“Great experience with LoadCalcs.net. Super fast response and turnaround time followed with one on one attention. Please don't take the HVAC companies rule of thumb recommendation. Educate yourself and get the facts with a certified Manual J calculation. I highly recommend and will use again.”
Services homeowners order most
Fast estimates
Send the plans. Get an estimate.
Send us your questionnaire and plans, and we’ll get you an estimate right away. Reach out during office hours and you’ll hear back within 30 minutes, whether it’s an email, text or call.