TOSHIBA Air-to-Air Heat ExchangerTOSHIBA Air-to-Air Heat Exchanger uses exhaust air to pre-condition incoming air to reduce cooling or heating demand and overall size of the air conditioning system. This improves the energy efficiency of the building and can also help to comply with buildings regulations. This style of unit comes in 4 differnt models - 151,251,351 & 501 Units come with built in spigots: 2 x 100mm to 2 x 200mmFresh air ventilationDATA SHEETSKU: Alph53 Select Unit Please selectU00151 SY-E U00251 SY-E U00351 SY-E U00501 SY-E £0.00 Qty: Add to cart Custom wishlist OKAdd to wishlistAdd to compare listEmail a friend