18/03/2026
🚨 HVAC Truth Bomb 🚨
If your contractor is sizing your new AC or heat pump with a cut-out paper house chart like this one... 😅 we've got a serious red flag!****LOOK AT THE PICTURE BELOW****
(Shoutout to the viral “Cheap HVAC" classic from 1980 – stand on the curb, peek through the hole, and hope the house "fits." 😂Perfect? Not even close.)
Here's the real deal:
Your existing system might have been:
Undersized → Always running, never quite cooling right
Over sized → Short cycling, high humidity, uneven temps, and higher bills
Or just "the same size as before"
That's not how you achieve real comfort and efficiency. That's how you get callbacks, premature failures, and wasted money.
Proper sizing isn't a guessing game or a paper toy. It's a detailed heat loss/heat gain calculation (like ACCA Manual J) that looks at:
✔ Insulation levels
✔ Window types, sizes & directions
✔ Air leakage & infiltration
✔ Ceiling heights & room volumes
✔ Ductwork condition and sizing
✔ Sun exposure, home orientation & local climate
This is technical work based on real data—not "close enough" or "what was there before" (which was probably wrong to begin with!).
Why go with a licensed HVAC contractor?
They're trained and accountable for doing it right.
In many areas (including for permitted jobs or to meet building codes/energy standards), proper load calculations are required.
They help ensure your new system's warranty stays valid.
Bottom line: You get a system that's perfectly matched to YOUR home for better comfort, lower energy bills, and longer equipment life.
And don't forget the BIG one: Anyone handling refrigerants (which is basically every AC/heat pump install or service) must have EPA certification. This federal requirement ensures safe, legal handling of refrigerants to protect the environment.
Before you sign on the dotted line, hit them with these questions:
🗣️ "Are you licensed in HVAC? Do you carry EPA certified?" If not why?
🗣️ "Will you perform a full heat loss/heat gain calculation (Manual J style), or are we going by rule-of-thumb/paper method?"
Your home (and wallet) deserve way better than a curb-side peek test.
Choose pros who do it right the first time.
– MR Heating & Cooling
(Your local trusted HVAC team – licensed, EPA-certified, and no paper houses here!)