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Tools5

RT-HOM-004 BTU Calculator

Air conditioner sizing made simple

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RT-HOM-001 Concrete Calculator

Cubic yards / meters for any pour

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RT-HOM-002 Paint Calculator

Gallons / liters for any room

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RT-HOM-003 Tile Calculator

Tiles + grout for any area

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RT-HOM-005 Tropical Pool Chemistry Calculator

Volume + chemistry in one tool

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Articles4

A white outdoor air-conditioning condenser unit with a large circular fan grille, against a plain background

Home & Living 5 min New air conditioners clear a global-warming limit on 2013 figures Singapore bars household air conditioners whose refrigerant exceeds a global warming potential of 750. The reg... AM Amelia Wong 4 Sep

A small desktop air-quality monitor showing a numeric reading on its display, standing on a light surface indoors.

Science 7 min Your CO2 monitor's red line is a 19th-century number, and it is drifting The 1000 ppm line is Pettenkofer's, proposed in the 19th century as a proxy for whether a room smelled stuffy.... NA Nadia Rahim 3 Sep

The edge of a tall stack of printed paper filling the frame.

Home & Living 7 min One Checkbox Multiplies Your Ink Bill by Thirteen Cartridge yields are rated against test pages averaging about 5 per cent ink coverage. We printed five of our... AM Amelia Wong 11 Aug

Rows of weathered air-conditioner condenser units bolted to the balconies of a tropical apartment block at golden hour, laundry hanging between them, against a deep navy sky.

Home & Living 15 min House Calculations for a Tropical Climate Ask this site how much air-conditioning a Petaling Jaya bedroom needs and, until this week, you got two differ... AM Amelia Wong 29 Jul

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