Comparison

Combi Valve Sizer vs Heating Pipe Size

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Combi Valve Sizer

This app simplifies the selection of specific HVAC components. It guides users through choosing the correct valve and actuator, calculates flow rates, and assists with presetting and commissioning. Users can also tag components and download reports.

Highlights
  • Guided valve and actuator selection
  • Valve sizing and flow calculation
  • Valve presetting calculation
  • Tagging valve location and designation
  • Commissioning check with reports
  • Data sheet downloads
  • Report sharing
Read full description

Combi Valve Sizer app from Siemens helps to select the right Acvatix PICV (combi valve) and matching actuator easily. Features: - Guided valve and actuator selection - Valve sizing - Calculation of maximum volumetric flow - Calculation of valve presetting - Tagging the valve location and designation - Commissioning check with report - Data sheets download - Sharing of reports and documents

About

Heating Pipe Size

Features
Read full description

Estimate required pipe diameter of a closed hydronic heating or cooling system in an instant and calculate pressure drop to determine required circulation pump characteristics (flow and head). Easy to use, quick and accurate results. Enter the required heating or cooling output and water flow and return temperatures. Choose pipe material. The recommended pipe diameter is already there, presented as a standard DN. Additionally, choose the recommended or a custom pipe diameter and specify pipe section length and fittings. Results include water flow rate, velocity, pressure drop and pressure drop per 100 m of straight pipe and can be used to determine the parameters of a circulation pump. ## Features: - Simple to use; - Suitable for hydronic (water-based) heating and cooling systems; - Suitable for a large range of heating and cooling outputs; - Predefined pipe materials; - Water temperature range from 1 to 99 ΒΊC; - Completely independent from any manufacturers; - No login needed, no data connection needed; - No data collection; - No subscriptions, one-time purchase only; - Very quick calculation with no delays; ## Possible uses of the application: - Quickly estimate required pipe diameter when designing a hydronic (water-based) closed heating or cooling system. - Quickly determine circulation pump requirements (flow and head), whether it be a new system or a replacement pump. ## Notes: - It is recommended to calculate every section of the piping system separately and additionally check the whole system pressure drop. - The application is only useful for calculations of hydronic (water based) closed heating or cooling systems. Other systems and media are not supported. - Only metric units are supported. - The application, while accurate, is not meant as a complete replacement of specialized software for heating and cooling system design. The application doesn't require data connection. It doesn't require and doesn't collect any personal data. It also doesn't contain third-party ads or code. Also: no in-app purchases, no subscriptions.

Screenshots

Combi Valve Sizer4 screens
Heating Pipe Size4 screens

Verdict

The call

The clearest difference is price: Combi Valve Sizer at Free against Heating Pipe Size's $5.99. Combi Valve Sizer also leads on iOS requirement (7.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Combi Valve Sizer is free to download; Heating Pipe Size costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Combi Valve Sizer ships an update every 9 months, Heating Pipe Size every 15 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard2 real differences Β· 6 level
Combi Valve Sizer versus Heating Pipe Size: the parameters behind the verdict, then further details
ParameterCombi Valve SizerHeating Pipe Size
PriceFree β€” better$5.99
Positive reviews0.0% of reviewsβ€”
Update frequencyEvery 9 months β€” betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeβ€”
DevicesiPhone, iPodiPhone, iPad, Mac β€” better
Requires iOS7.0 β€” better26.0
Further details β€” not scored
Size50 MB1 MB
Age rating4+4+
DeveloperSiemens AGSebastjan Valic

In-app purchases

None

Combi Valve Sizer

No in-app purchases

None

Heating Pipe Size

No in-app purchases

Questions

Is Combi Valve Sizer free?
Combi Valve Sizer is free to download, with no in-app purchases.
Is Heating Pipe Size free?
Heating Pipe Size costs $5.99, with no in-app purchases.
Do Combi Valve Sizer or Heating Pipe Size have ads?
Neither Combi Valve Sizer nor Heating Pipe Size shows ads.
Which is updated more often, Combi Valve Sizer or Heating Pipe Size?
Combi Valve Sizer ships an update every 9 months, and Heating Pipe Size every 15 months. Most recently, Combi Valve Sizer was updated on October 1, 2026 and Heating Pipe Size on October 12, 2026.

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