【完全版】第一種 vs 第三種換気完全ガイド！一級建築士が断言する「C値0.5以下」の絶対条件

▼If you're unsure about choosing a construction company, try our free consultation! https://lin.ee/wnJWqF8 "Which should I choose, Type 1 or Type 3 ventilation?" "Type 1 ventilation is expensive, so I'm hesitant..." In custom home building, the ventilation system is often overlooked and seems like a minor detail. However, the ventilation system is actually a crucial piece of equipment that significantly impacts the lifespan of your home and your energy costs! And to put it bluntly, there's a harsh truth: "No matter how expensive a Type 1 ventilation system (heat exchange type) you install, it's completely meaningless (a waste of money) if your home's airtightness (C-value) is poor." In this video, a design professional thoroughly explains the differences between Type 1 and Type 3 ventilation and the realities of energy cost reduction through heat exchange. We'll reveal behind-the-scenes stories not found in catalogs, such as why poor airtightness allows cold air and pollen to freely enter through gaps, and duct maintenance issues. If you're currently choosing a construction company or are undecided about a ventilation system, please watch this video to the end to avoid wasting nearly 1 million yen on initial costs! 【What you'll learn in this video】 ⚠️ Differences between Type 1 and Type 3 ventilation ・Type 1 ventilation (mechanical intake and exhaust): If you use a heat exchange system, you can warm the cold outside air before bringing it in, preventing heat loss for heating and cooling and lowering utility costs (a difference of about 10,000 yen per year!). ・Type 3 ventilation (natural intake, mechanical exhaust): Cold outside air (0 degrees Celsius) enters directly, reducing heating and cooling efficiency. ・Type 1 ventilation is more expensive initially (approximately 500,000 to 1,500,000 yen). 💡 A professional's warning! The biggest trap in choosing a ventilation system ・To get 100% out of the ventilation system's performance, "house airtightness (C-value)" is an absolute requirement! ・If the airtightness is poor (many gaps), pollen and PM2.5 will enter through the gaps even with high-performance filters. Type 1 ventilation is only truly effective in "highly airtight and well-insulated homes (C-value 0.5 or less)." Otherwise, Type 3 ventilation might be sufficient. 【Recommended for those who:】 Are undecided about the ventilation system (Type 1 or Type 3) for their custom-built home Want to reduce their home's energy costs and achieve a comfortable life that is warm in winter and cool in summer Have hay fever or allergies and want to keep the air inside their home clean #HomeBuilding #CustomHomes #HouseDesign #Interior #Exterior #ConstructionCompany ■Grazzo's Official Website: https://glazzo.jp/ □Company Information Grazzo Co., Ltd. Location: 560-1, Takagai-cho, Omihachiman City, Shiga Prefecture, 1F Construction Area: All of Shiga Prefecture, Kyoto City, and parts of Osaka Prefecture Grazzo Empathy Co., Ltd. Location: 560-1, Takagai-cho, Omihachiman City, Shiga Prefecture, 1F Construction Area: Kanagawa Prefecture, Tokyo Grazzo Architect Co., Ltd. Location: 1-1-20, Nishinengu, Aizuwakamatsu City, Fukushima Prefecture Construction Area: All of Fukushima Prefecture