Engineering Calculator HVAC
Utilities
Free · Designed for iPad. Not verified for macOS.
Convert HVAC units and run five engineering calculations in seconds. Offline, no ads, no sign-up.
HVAC engineering calculations in seconds — right on site, without an internet connection.
Converting kgf/cm² to bar, checking the velocity in a pipe, sizing an expansion tank or picking a valve Kvs used to mean searching the web, leafing through a handbook and doing arithmetic in your head. Now your phone is enough.
UNIT CONVERSION WITHOUT MISTAKES
Enter a value once and see it in every unit of the category at the same time. Pressure, flow rate, power, energy, temperature, length, area, volume, mass and velocity: ten categories, about eighty units, including kgf/cm², mmH₂O, Gcal/h, BTU/h and psi. Any value is copied with a single tap, straight into an email or a bill of quantities.
PIPE VELOCITY ACROSS EVERY SIZE AT ONCE
Enter the flow rate and see the velocity for every pipe size, with a colour hint: where it is too low, where it is fine, where the pipe will get noisy. Steel to GOST 3262 up to DN 350, PP-R PN20, PEX and PE-RT, copper to EN 1057 — with real inner diameters, not nominal ones. Picking a diameter takes a couple of seconds.
THERMAL POWER AND FLOW, BOTH WAYS
Know the flow rate and you get the power. Know the power and you get the flow rate. Water, ethylene glycol and propylene glycol from 10 to 60 percent, with density and specific heat taken at the average temperature rather than approximated. The result comes in kW, kcal/h and Gcal/h at once.
VALVES
Pressure drop across a control or balancing valve from its Kvs, and the reverse task: which Kvs is needed for a given drop. In bar, kPa and metres of water column.
EXPANSION TANK
Required membrane tank volume, the nearest standard size, the expansion volume and the tank efficiency. The system volume can be estimated from the installed power. If the temperatures or pressures are inconsistent, the app says so instead of returning a neat but wrong number.
PIPE INSULATION
Surface area, area per metre, insulation volume and the insulated diameter — numbers ready for a bill of quantities.
REFERENCE DATA INSIDE
Steel water and gas pipes to GOST 3262 from DN 15 to DN 350, PP-R PN20, PEX and PE-RT, copper pipes to EN 1057. Water density and specific heat by temperature, properties of water and glycol mixtures, volumetric expansion coefficients, the standard range of expansion tanks from 5 to 1000 litres and typical insulation thicknesses by diameter.
WHY IT WORKS ON SITE
• Fully offline: no internet needed in a basement or on a construction site
• Nothing extra: no ads, no sign-up, no subscriptions, no permissions
• Input accepts both a comma and a dot, the numeric keyboard opens by itself
• Russian and English, light and dark theme
• Selected units and settings are remembered
WHO IT IS FOR
HVAC and plumbing designers, heating and water supply installers, service engineers of boiler houses and heat substations, energy auditors and students of related fields.
Written by a practising HVAC engineer for himself and his colleagues. Free.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 6.0 — the app has been rewritten from scratch, one codebase for iPhone and iPad.
Fixed
• The swap button no longer corrupts the value
• A comma in the input is no longer dropped: 1,5 now means 1.5
• Zero and large numbers are shown as plain digits, no scientific notation
• Changing the category no longer clears the result
• The expansion tank validates temperatures and pressures instead of returning a negative volume
• Thermal power uses water density by temperature
• Language and selected units are remembered between launches
New
• Pipe velocity across every size at once: steel up to DN 350, PP-R, PEX and copper with real inner diameters
• Calculations both ways: power and flow, pressure drop and Kvs selection
• Pipe insulation: area, area per metre, volume and insulated diameter
• Dark theme, numeric keyboard, copy any result by tapping it
• New icon and refreshed interface
The developer, aleksandr bronnikov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- aleksandr bronnikov
- Size
- 19.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2024 Engineering Tools