3 ms·

Tankless gas water heaters have been demonstrated to not be very efficient, and also require a great deal of maintenance due to the very high BTU burner they re

by danans 5y ago

Tankless gas water heaters have been demonstrated to not be very efficient, and also require a great deal of maintenance due to the very high BTU burner they require. Here's Matt Risinger's take: https://www.youtube.com/watch?v=8RFuFBI3r2c https://www.youtube.com/watch?v=8RFuFBI3r2c

jessaustin 5y ago
Risinger is entertaining, and is rarely afraid to spend more on construction, but in general his opinions seem to conform very closely to the commercial interests of his biggest sponsors. The biggest objection at your link seems to be that tankless allows long showers? What kind of ridiculous objection is that? There are big yellow efficiency tags on the front of every appliance for sale in USA. The content of those tags is closely regulated by the government. If there is some reason to believe that they are inaccurate for tankless water heaters, please link to that.
- danans 5y ago
  Let me rephrase: Tankless gas water heaters (90-97% efficient) aren't anywhere near as efficient as more modern alternatives, specifically heat pump water heaters, which are 300-400% efficient. They are are marginally more efficient than condensing storage gas water heaters, which are 89% efficient. Given the gulf in efficiency between tankless gas and heat pump water heaters, tankless gas shouldn't really be promoted as examples of high efficiency. https://www.energystar.gov/productfinder/product/certified-water-heaters/?formId=8423992-4636-4-89-377412206&scrollTo=141&search_text=&type_filter=&fuel_filter=&brand_name_isopen=0&input_rate_thousand_btu_per_hour_isopen=0&markets_filter=United+States&zip_code_filter=&product_types=Select+a+Product+Category&sort_by=brand_name&sort_direction=desc&currentZipCode=94604&page_number=0&lastpage=0 https://www.energystar.gov/productfinder/product/certified-w...

3 ms·

Tankless gas water heaters have been demonstrated to not be very efficient, and also require a great deal of maintenance due to the very high BTU burner they re

by danans 5y ago

jessaustin 5y ago
Risinger is entertaining, and is rarely afraid to spend more on construction, but in general his opinions seem to conform very closely to the commercial interests of his biggest sponsors. The biggest objection at your link seems to be that tankless allows long showers? What kind of ridiculous objection is that? There are big yellow efficiency tags on the front of every appliance for sale in USA. The content of those tags is closely regulated by the government. If there is some reason to believe that they are inaccurate for tankless water heaters, please link to that.
- danans 5y ago
  Let me rephrase: Tankless gas water heaters (90-97% efficient) aren't anywhere near as efficient as more modern alternatives, specifically heat pump water heaters, which are 300-400% efficient. They are are marginally more efficient than condensing storage gas water heaters, which are 89% efficient. Given the gulf in efficiency between tankless gas and heat pump water heaters, tankless gas shouldn't really be promoted as examples of high efficiency. https://www.energystar.gov/productfinder/product/certified-water-heaters/?formId=8423992-4636-4-89-377412206&scrollTo=141&search_text=&type_filter=&fuel_filter=&brand_name_isopen=0&input_rate_thousand_btu_per_hour_isopen=0&markets_filter=United+States&zip_code_filter=&product_types=Select+a+Product+Category&sort_by=brand_name&sort_direction=desc&currentZipCode=94604&page_number=0&lastpage=0 https://www.energystar.gov/productfinder/product/certified-w...