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HVAC 換気設計: 空気取り入れ口の最小分離距離
Air intake minimum separation distance represents critical design criteria for ensuring adequate outdoor air quality by maintaining appropriate distances between fresh air intakes and potential contamination sources.
HVAC 負荷推定: ダイバーシティ係数
Diversity factor represents a critical design parameter in HVAC load calculations, accounting for the statistical probability that all heat-generating components in a building will not operate simultaneously
HVAC 負荷の推定: 浸透熱の利得と損失
Infiltration represents uncontrolled air exchange between outdoor and indoor environments, significantly impacting both heating and cooling loads in all building types. Accurate infiltration estimation is essential for
HVAC 負荷の推定: 機器および家電製品からの内部熱利得
Equipment and appliances represent significant internal heat sources in modern buildings, often comprising the largest component of cooling loads in commercial and industrial facilities. Accurate estimation of
HVAC負荷推定：グレージングU値とシェーディング係数（SC）値
Fenestration thermal and solar properties are critical parameters in HVAC load calculations, significantly impacting both heating and cooling loads. Understanding glazing U-values and shading coefficients is essential
HVAC負荷推定：壁、屋根、パーティションの構造U値
Building envelope thermal properties form the backbone of HVAC load calculations, directly determining heat transfer rates and system sizing requirements. Accurate U-value determination is essential for
HVAC 乾湿プロセス: チャート、計算、および空気処理アプリケーション
Psychrometric processes form the scientific foundation of HVAC system design, enabling engineers to analyze air conditions and design effective air treatment systems. Understanding these processes is essential
HVACデザイン方程式：空気、ファン、ポンプ、および水素システムの計算
HVAC engineers rely on fundamental equations to design, size, and optimize mechanical systems. These mathematical relationships form the backbone of proper system design, ensuring accurate performance predictions
HVAC機器の寿命に関するASHRAEガイドライン
Learn how to apply ASHRAE guidelines on HVAC equipment life expectancy to optimize your building’s maintenance schedules and replacement budgeting.
デジタルツールとリソース
Ductulator and Pressure Loss (friction) calculator
Streamline your HVAC design process with our comprehensive digital Ductulator and Pressure Loss Calculator. This all-in-one tool allows you to instantly convert duct shapes, determine optimal sizing based on friction or velocity constraints, and accurately calculate total pressure loss and airflow rates for complex ductwork systems.
Air mixing calculator
Accurately determine the final thermodynamic state of combined airstreams. Input flow rates and air properties to instantly calculate mixed air conditions, streamlining AHU fresh-air and return-air mixing design.
Psychrometric state calculator
Instantly determine the complete psychrometric state of moist air using just two inputs. Enter dry-bulb temperature alongside any single humidity parameter to automatically calculate dew point, wet-bulb, relative humidity, enthalpy, specific volume, and density for precise HVAC design and analysis.
Expansion Tank Sizing Calculator
Size bladder, diaphragm, or plain-steel expansion tanks for closed hydronic systems in seconds. This calculator applies thermal-expansion and pressure-ratio principles from Steven T. Taylor’s ASHRAE-referenced sizing method and the ASME Boiler and Pressure Vessel Code, Section VI, to compute the minimum required tank acceptance volume for hot water, chilled water, and mixed-temperature systems. Supports US and SI units, all four major tank styles, an optional piping-expansion credit, and a built-in ASME/UMC/IMC cross-check for 170–230°F systems — with clear pass/warning/invalid status and next-step guidance for tank selection and precharge verification.
Critical Radius of Insulation Calculator
Determines the critical radius (and critical thickness) of insulation for a cylinder or sphere — the outer radius at which heat loss is maximum — and compares heat‑loss rates before and after insulation.
HVAC機器寿命計算機
プロのHVAC機器の寿命計算機を作成しました。このアプリケーションは、さまざまなHVAC機器タイプの残りの耐用年数を決定するための包括的な計算を提供します。
最新のHVACアプリケーション向けのBIMソフトウェアソリューション
As the HVAC industry continues to evolve in 2025, Building Information Modeling (BIM) has become an indispensable tool for professionals seeking to optimize design, installation,
McQuayソフトウェアのダウンロード
Explore a comprehensive guide on locating and downloading McQuay software tools to streamline your HVAC system design and selection processes.