HVAC Cost Calculator
Use the existing city project-cost estimator and its current calculation behavior.
Open calculator 11 free planning tools
Free HVAC Calculators for Boston, MA
Estimate project cost, BTUs, heating and cooling loads, equipment size, duct dimensions, energy use, humidity capacity and monthly financing with locally informed planning defaults.
Choose an HVAC calculator
Each tool returns a complete estimate before the optional call-to-action and explains the assumptions behind the result.
HVAC BTU Calculator
Estimate heating or cooling BTUs from room or home characteristics and a regional climate adjustment.
Open calculatorHVAC Duct Size Calculator
Estimate round and rectangular duct dimensions from CFM, target velocity, duct use, and material.
Open calculatorHVAC Load Calculator
Estimate separate residential cooling and heating loads with a simplified climate-aware model.
Open calculatorAC Size & Tonnage Calculator
Estimate central air-conditioner BTUs, tonnage, and a common nominal size to evaluate.
Open calculatorHeat Pump Size Calculator
Estimate heating and cooling capacity while highlighting cold-weather performance and backup-heat decisions.
Open calculatorFurnace Size Calculator
Estimate delivered heating load, furnace input BTUs, and the effect of AFUE.
Open calculatorSEER & SEER2 Savings Calculator
Compare estimated annual cooling cost, percentage reduction, and simple five- and ten-year savings.
Open calculatorAC Energy Cost Calculator
Estimate AC kWh per day, month, and cooling season with editable runtime and electricity price.
Open calculatorDehumidifier Size Calculator
Estimate pints-per-day capacity from space size, volume, humidity, moisture severity, and climate profile.
Open calculatorHVAC Financing Calculator
Estimate a fixed monthly HVAC loan payment, total interest, and total paid from user-entered terms.
Open calculatorPlanning for Boston conditions
Warm periods create a real cooling load, but the season is shorter than in southern markets. Sustained cold weather makes envelope heat loss and heating capacity central planning concerns.
The calculators use a broad cold / moist profile where climate affects sizing, energy or humidity. Those factors are deliberately visible as planning assumptions and never presented as a certified load calculation.
Use local inputs whenever possible
Enter the actual served area, insulation, windows, runtime, utility rate and financing terms when known. The MA electricity default is the preliminary June 2026 EIA residential average and can be replaced with the effective rate from the user's bill.
Before selecting equipment, ask a qualified professional to verify loads, manufacturer performance, airflow, ducts and installation conditions for the property.
HVAC calculator FAQs
Are these HVAC calculators free?
Yes. All eleven tools run in the browser without an account, email address or phone-number form.
Do the calculators replace professional HVAC design?
No. They provide planning estimates. Equipment sizing, duct design and installation decisions should use a complete property assessment and recognized design methods.
How are the tools localized for Boston?
Transparent cold / moist planning factors affect relevant defaults and explanations. The energy tools use an editable MA residential electricity-price default.
Where is the original HVAC cost calculator?
It remains at its existing URL and is featured first on this hub. Its URL and calculator behavior are preserved.
Need help confirming the plan?
Use the complete calculator result first, then speak with a local HVAC professional about the actual building and system.
Call: (833) 523-0241