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HVAC Replacement Cost Calculator for HVAC Companies, Built by Chatting with Claude

This HVAC replacement calculator gives homeowners a starting price from their home size, what they need replaced, and how much they care about efficiency. A real number on the page means more of them schedule the in-home consult. You build it by chatting with Claude, it keeps your equipment pricing behind the scenes, and your first form is free.

Build yours free →Try the live calculator ↓

Try it yourself

This is a real, working CalcForms calculator embedded right on the page. Enter your details and watch the estimate update on the spot. It is exactly what your customers would use, and every submission lands in your dashboard as a lead.

forms.badabingapp.cc/hvac-replacement-cost-calculator

What it calculates

Why it closes more deals

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A live number closes deals

Customers who see a real estimate the second they enter their details are far likelier to book than ones told to call for a quote. The number is the hook.

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Runs your most complex spreadsheet

Multi-tab workbooks, lookup tables, tiered rates, conditional line items, the lot. If the math runs in Excel, CalcForms runs it behind a clean form.

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Update it by chatting

Prices move. Ask Claude to change a rate, add an option, or insert a step and the live form updates in seconds. No developer, no redeploy.

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Backtest before you publish

Run your last 20 real jobs through it and tune the formula until the live estimate matches what you actually charge. Ship it once it lines up.

Why calculator forms convert — by the numbers

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47.3% vs 2.8%

In an analysis of 50,000+ forms, interactive forms averaged a 47.3% conversion rate versus 2.8% for static forms. (Outgrow)

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2× conversions

Interactive content generates roughly twice as many conversions as static content. (Content Marketing Institute)

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51% of buyers

51% of B2B software buyers now begin their research in an AI chatbot rather than a search engine. (G2, 2026)

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1 in 3

A third of B2B buyers have chosen a vendor they had never heard of before, on an AI assistant's recommendation. (G2, 2026)

How this form was built

No template builder and no code. One message to Claude with the CalcForms connector switched on:

✦ Claude with the CalcForms connector
Build an HVAC replacement cost calculator for homeowners. Inputs: home size, what they need (AC, furnace, both, or heat pump), comfort priority (standard, better, top efficiency), and ducts. Size the system from home size, price by system type from your equipment list, apply an efficiency multiplier from the comfort priority, add duct work when needed, and show a starting installed price.
Done. I built HVAC Replacement Cost Calculator with your pricing and deployed it to forms.badabingapp.cc. The math runs server-side and every submission is saved with the inputs and email. Want to add a field or change a rate? Just tell me.

Build this exact form

CalcForms is a connector you add to Claude once. After that you build and edit forms just by chatting.

  1. Add CalcForms to Claude. Open the Add custom connector dialog, name it Calcforms, and paste https://forms.badabingapp.cc. One time, about 60 seconds.
  2. Paste the prompt below. Claude builds the form, wires in your math, and hands you a live URL.
  3. Share it, then tweak by chatting. Put it on your site or send the link. Change a rate or add a field later just by asking.
Copy this prompt into Claude

"Build an HVAC replacement cost calculator for homeowners. Inputs: home size, what they need (AC, furnace, both, or heat pump), comfort priority (standard, better, top efficiency), and ducts. Size the system from home size, price by system type from your equipment list, apply an efficiency multiplier from the comfort priority, add duct work when needed, and show a starting installed price."

Example run: Medium home, AC and furnace, better efficiency, reuse ducts: starts around $11,900.

New to connectors? A connector (an MCP server) is a secure link between Claude and an app. The CalcForms connector lets Claude build, deploy, and update real calculator forms for you, all from the chat window.

What it works out

FAQ

How does it know what size system to price?
It works out the right size from the home size you map in, then prices the equipment from your list. You can refine the logic by asking Claude.
Can I price multiple brands and efficiency levels?
Yes. Keep your equipment in a table by efficiency level and the calculator applies the right price and adjustment automatically.
Does it handle full system versus AC-only swaps?
It branches on system type, so an AC-only quote and a full AC-plus-furnace quote use different equipment lines from the same form.
Will this match my real install quotes?
Backtest it against your recent installs and tune your rates until the live estimate matches what your techs actually quote.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

Start free →

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