# Pipe Sizing Calc HVAC — Copper, Steel, CPVC, PEX

> Copper, Steel, CPVC, PEX (iPhone/iPad app by Rizvan Adzhoian.)

- Source: https://appshunter.io/ios/app/pipe-sizing-calc-hvac/id6764647643 (this page in markdown: same URL + `.md`)
- Developer: [Rizvan Adzhoian](https://appshunter.io/developer/1891746079)
- Category: Utilities, Business
- Price: $0.99 with in-app purchases
- Age rating: 17+
- Requires: iOS 13.0 · 34 MB
- Languages: English
- Released: 2026-05-04
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/pipe-sizing-calc-hvac/id6764647643/reviews.md

## What is Pipe Sizing Calc HVAC?

HVAC Hydronic Pipe Sizing Calculator is the professional tool for HVAC technicians, plumbers, and hydronic system installers. Calculate correct hydronic pipe size based on flow rate (GPM) with automatic velocity and pressure drop calculations - using Darcy-Weisbach hydraulic analysis for accurate heating and cooling system design.

PIPE MATERIAL TYPES:
Copper Type L - Standard copper tubing for residential systems
Copper Type M - Thinner copper for high-pressure applications
Steel Schedule 40 - Carbon steel pipe for industrial systems
CPVC - CTS SDR-11 per ASTM D2846, 1/2" to 2" hot/cold water sizes
PEX - Cross-linked polyethylene for modern systems

CORE SIZING FEATURES:
Flow Rate Sizing - Enter GPM to get recommended standard pipe sizes instantly
Velocity Check - Ensures flow stays within safe limits (optimal 3-10 FPS)
Pressure Drop Analysis - Darcy-Weisbach calculation per 100 ft of pipe
Reynolds Number - Full hydraulic analysis for precision system design
Standard Sizing - All results snap to industry-standard nominal pipe sizes
Instant Results - Calculated velocity and friction loss displayed immediately

FLUID SUPPORT:
Water Only - Standard hydronic heating water calculations
30% Glycol Mixture - Anti-freeze protection for cold climates
50% Glycol Mixture - Maximum freeze protection systems
Automatic Density/Viscosity - Adjusts calculations for fluid type

ADVANCED CALCULATIONS:
Pressure Drop Per 100 ft - Complete friction loss analysis
Velocity Verification - Confirms proper flow rates prevent erosion
Glycol Property Presets - Density and viscosity adjust automatically
Limit Warning - Flags results that exceed velocity or pressure-drop limits
Friction Factor Display - Swamee-Jain (Colebrook) factor on every result

OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
• Unlimited saved calculation history
• PDF export of results
• Dark theme
• Ad-free experience

WHY HYDRONIC & HVAC PROS USE THIS APP:
Faster pipe sizing than friction loss charts and tables
Accurate sizing prevents undersized/oversized pipes
Reduces pressure drop problems in hydronic systems
Ensures proper flow velocities for system efficiency
Prevents erosion damage in copper piping (>10 FPS)
Prevents noise and cavitation in hydronic systems

PERFECT FOR:
HVAC technicians designing hydronic heating systems
Plumbers sizing water and glycol piping
Hydronic system installers planning equipment layouts
HVAC contractors preparing accurate material estimates
Geothermal heat pump system designers
Radiant floor heating system design
HVAC students learning hydronic calculations
Building commissioning engineers

Based on Darcy-Weisbach friction loss methodology and industry-standard hydraulic calculations.

Part of HVACTools Suite - professional HVAC technician tools for hydronic design, refrigeration diagnostics, and field calculations.

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Unlock | $2.99 | one-time |



## Version history (last 3 releases)

### 1.0.5 — 2026-06-11

What's new:
- Corrected CPVC inside diameters to ASTM D2846 CTS SDR-11 (previous values were outside diameters); CPVC limited to the manufactured 1/2"-2" range
- PEX inside diameters aligned to ASTM F876
- New warning when no catalog size meets the velocity/pressure-drop limits

### 1.0.4 — 2026-05-18

What's new:
- Updated metadata for clarity per App Store guidelines
- Optional Pro upgrade is a separate one-time in-app purchase (not required for calculator features)

### 1.0.3 — 2026-05-04

No release notes.

## More apps by Rizvan Adzhoian

- [Conduit Fill Calculator-NEC](https://appshunter.io/ios/app/conduit-fill-calculator-nec/id6761846849)
- [Electrical Load Calc NEC](https://appshunter.io/ios/app/electrical-load-calc-nec/id6763250945)
- [Transformer Calc NEC](https://appshunter.io/ios/app/transformer-calc-nec/id6763311943)
- [Voltage Drop Calc NEC](https://appshunter.io/ios/app/voltage-drop-calc-nec/id6763312448)
- [Grounding Size Calc NEC](https://appshunter.io/ios/app/grounding-size-calc-nec/id6763312724)
- [Breaker Size Calc NEC](https://appshunter.io/ios/app/breaker-size-calc-nec/id6763312865)

All apps by Rizvan Adzhoian: https://appshunter.io/developer/1891746079

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*