Heat Loss / Heat Gain Calculations

Comfort Starts with Precision

Perfect comfort, lower bills, and peace of mind, backed by science.

Engineered Comfort. Backed by Data. Built on Precision.

Comfort isn’t luck; it’s the outcome of innovative design and exact calculation. At ON Point, we provide precise HVAC load calculations. This ensures that your system design works as intended. Efficiently, compliantly, and customized for your build.

If you’re building a new custom home or renovating, our reports provide your team with the correct data. This helps size equipment, simplify permits, and keep construction on schedule.

Why Precision Matters

When it comes to heating and cooling, close enough isn’t good enough.

An oversized system short-cycles, wastes energy, and wears out early. A small system can’t keep up, leading to uneven comfort and possible code violations.

We perform Manual J–J-style Heat Loss and Heat Gain Calculations. These calculations consider all key factors, including insulation values, solar gain, and occupancy. This way, we provide accurate load data that meets code requirements.

With ON Point, you get:

✅ Even, consistent comfort throughout the home

✅ Efficient operation and lower long-term energy use

✅ Documentation ready for building permits and rebate programs

✅ Confidence that your HVAC system is designed, not guessed

What Makes ON Point Different

Most contractors estimate. We calculate. Then we collaborate.

We begin with your project goals. This includes your preferred heating and cooling type, performance targets, and the home’s design intent. Whether you prefer in-floor heating, a heat pump, or a hybrid system, our calculations are tailored to meet your needs and comfort goals.

Every home design is unique. We review your architectural drawings to verify insulation values, window placement, solar exposure, and ventilation. The result: exact load data that ensures your system size, ductwork, and layout are both code-compliant and ready for real-world use.

Our process integrates seamlessly with your builder, architect, or mechanical installer. We provide clear, organized documentation that’s easy to use. This helps reduce change orders, delays, and confusion during the construction process.

You’ll get a clear report. It will outline your load calculations, equipment capacity, and system recommendations. This is ready for permit submission or approval for an energy-efficiency program.

Our process: simple, precise, reliable

Real-World Results

The Smith Family
“Our old furnace kept turning on and off every few minutes. ON Point’s heat loss calculation showed it was 40% too big. They installed the right-sized system, and now our home is evenly warm — plus our gas bill dropped by 22%.”

FAQ — What Homeowners Ask Us Most

How long does it take?

We do our best to complete each report as quickly as possible, but the time does vary depending on the size of the job.

You’ll get a complete Heat Loss / Heat Gain report, equipment sizing suggestions, and all the data you need for permits and design coordination.

Yes, our documents meet the needs of most municipal building departments and energy-efficiency programs.

Absolutely. We help you choose design options, like air-source heat pumps and high-efficiency furnaces. We base our recommendations on your performance goals and comfort needs.

We can quickly adjust your calculations to fit layout or envelope changes. This way, your documentation stays accurate and compliant.

Your Next Step Toward a Seamless Build

Stop estimating — start designing with precision.

With ON Point’s Heat Loss / Heat Gain Calculations, you get:

  • Data-driven design confidence
  • Permit-ready documentation
  • Seamless coordination with your build team

Let’s Get Started. Upload your plans or book a consultation. Build comfort with proven data.

Because the best comfort starts long before move-in day.