HVAC Size Calculator & System Size Guide
Use our HVAC size calculator to estimate the right air conditioner or heat
pump size for your home. Enter your home’s square footage and basic
conditions to receive a quick recommended system size.
For a more detailed recommendation based on your existing system and
climate, you can also use our Find My System tool.
HVAC Size Calculator
I'm Shopping or
Need Sizing Help
Get expert guidance choosing the
right MRCOOL system for your space
I Already Purchased
and Need Support
Quick help with others, delivery,
installation, or warranty questions,
Help However and Whenever You Need It
Undersizing
Choosing too small a system can leave rooms uncomfortable during extreme weather.
Oversizing
Systems that are too large can short-cycle, reducing efficiency and comfort.
Call Us
Mon-Sun: 8AM-6PM CST
(888) 288-1974
EMAIL US 24/7
We'll respond FAST during business hours
help@bcoolusa.com
What We Can Help With
Choosing the Right MRCOOL System
Expert guidance for single zone, multi zone & central AC ducted systems.
Sizing & System Matching
BTUs, zones, line sets, and climate recommendations made simple.
Order & Delivery Support
Shipping updates, tracking info, and replacement assistance.
DIY & Installation Guidance
Simple answers from spe-cialists who understand MRCOOL systems.
Before You Contact Us
How fast will I get a reply?
Most contact methods receive a same-day response, (<30 minutes during business hours).
Is this a genuine MRCOOL with full warranty?
Yes. Every system ships factory-fresh from MRCOOL with full manufacturer coverage.
From where do orders ship?
All orders ship from the nearest MRCOOL warehouse for the fastest delivery.
Can you help me match the right system?
Absolutely. Our specialists can size any room, home, or multi zone floor plan.
The People Behind bCOOL
Real People. Real Support. No Pressure
Ask Us Anything
Help Center
Browse FAQs, installation and user manuals and more.
Visit the Help Center