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New Warm Air Replacement in Horsham District

Aquair HIU range from Johnson & Starley. 


 The Aquair is a water to air heat exchange unit with a heat output between 10kW and 36kW (assuming a hot water supply of 80C is available). 

With the latest energy efficient technology, the Aquair Heat Interface Unit is the most unique and versatile solution on the market when it comes to replacing any aging warm air heater. 

The Aquair will provide all the benefits that a centralised heating system can offer, but with a host of additional advantages.

There could also be a requirement to heat some previously unheated rooms or add additional heating to an extension. 

With the Johnson & Starley Aquair it is possible to mix both warm air heating and radiators in one home installed with a combi in their range. 

The Aquair HIU is unique in its design and its versatility will provide all the benefits that we have a come to expect from a central heating systems. 

There is no other product on the market that can replace a warm air heater in a single dwelling, fully utilising the existing warm air ducting, be integrated into a centralised heating system, run in conjunction with an existing wet system, and with the option of supplying unheated air for cooling purposes during warm weather conditions.

Aquair HIU’s can be used with a vast range of heat sources, As well as natural gas & LPG it can be used with oil condensing boilers, heat pumps, biomass, solid fuel or combined heat and power (CHP) 

Aquair Heat Interface units are available in the following 5 models… 


S-10 Output – 10kW 

Available as upflow or downflow – YES

Dimensions – H766 x W300 x D549 

Optional summer air flow – YES 

Upflow with addition of auto air vent – YES 

Optional Cleanflow electronic air filtration – YES 

Weight – 26kg 


S-16 Output – 16kW 

Available as upflow or downflow – YES 

Dimensions – H785 x W445 x D522 

Optional summer air flow – YES 

Upflow with addition of auto air vent – YES 

Optional Cleanflow electronic air filtration – YES 

Weight – 36.5kg 


S-20 Output – 20kW 

Available as upflow or downflow – YES 

Dimensions – H787 x W481 x D614 

Optional summer air flow – YES 

Upflow with addition of auto air vent – YES 

Optional Cleanflow electronic air filtration – YES 

Weight – 42.51kg 


S-25 Output – 25kW 

Available as upflow or downflow – NO, 

Downflow only Dimensions – H1078 x W480 x D710 

Optional summer air flow – YES 

Upflow with addition of auto air vent – NO 

Optional Cleanflow electronic air filtration – please call for more information 

Weight – 70kg 


S-36kW Output – 36kW

Available as upflow or downflow – NO, 

Downflow only Dimensions – H1045 x W710 x D733 

Optional summer air flow – YES 

Upflow with addition of auto air vent – NO 

Optional Cleanflow electronic air filtration – please call for more information 

Weight – 113kg 


Available as either an upflow or downflow unit with modulating control incorporated. 

With a mesh filter fitted as standard, a Cleanflow electronic air cleaner being available as an option. 

The unit requires a supply of hot water at a minimum temperature of 80C. 

Water connections are top left or right handed through knockouts in the sides of the cabinet. 

Air is drawn in through the air filter or air cleaner (if fitted) and the heat exchanger by a centrifugal fan, and is discharged through the opposite end of the unit. 

An external summer air circulation switch (not provided) provides the facility to supply unheated air to the air outlets during warm weather. 

An external timer (not provided) will be required if it is necessary to set the periods of operation. 

Features: Air circulation fan with EC technology Air filter PCB control board Hot water return to heat source Hot water flow from heat source Heat exchanger Can fully untilise the existing warm air ducting.  

Available in Horsham District 

10% discount on aquair units during 2021, No fuss, no mess installations, no ugly pipe runs to new radiators are needed. 

Covering Horsham District

Horsham, Southwater, Broadbridge Heath, Slinfold, Billingshurst, Steyning, Storrington, Ashington, Rudgwick, Cowfold, Pulborough, Warnham, Henfield, Bramber, Upper Beeding, Partridge Green, Rusper & Faygate.