The decision about size has a huge impact on comfort and cost, but sometimes HVAC contractors get the numbers wrong. That’s why you should double-check the contractor’s figures and information before you sign a contract.

Still in doubt? Your local government has a building official who can help you with this document.

Errors expensive

Miscalculations on the Manual J can have big ramifications:

• The equipment is too small to be adequate.

• The equipment is too large, which costs you more for materials and causes humidity problems, too.

• Oversized equipment also causes short-cycling – the system performs erratically and cheats you of comfortable air and heat.

When it comes to contracts and Manual J, remember the words of former President Ronald Reagan: “Trust but verify!”

Your best choice for HVAC service in Queens, Long Island, Manhattan and Brooklyn is Premier, which answers calls promptly and guarantees its work.