BOSCH BMAC4248BNTF Evaporator Coil

A 30 in Bosch coil for systems that move more air

The Bosch BMAC4248BNTF is a cased evaporator coil 17½ in wide and 30 in high. Bosch publishes a maximum airflow of 1,800 CFM in upflow for this model, with a 7/8 in vapor line. It is multi-position and compatible with both air conditioning and heat pumps. AirGreen installs it in Montreal, Laval, Longueuil, on the North Shore and on the South Shore.

What it does and which homes it suits

The coil goes in the airstream, above, below or beside an electric furnace or air handler. Refrigerant from the outdoor unit flows through it: in summer, it cools the house air; in winter, matched with a heat pump, it warms it. In its matching tables, Bosch lists it with two outdoor units of its BOVA 2.0 heat pump, the BOVA-36HDN1-M20G and the BOVA-60HDN1-M20G. The choice between them depends on what the house needs, and that match sets the capacity: Bosch does not publish a nominal tonnage for this exact coil.

It suits multi-storey houses well, for example a North Shore two-storey home whose electric furnace, in the basement, serves the ground floor and the bedroom floor. It also suits owners of a Bosch system replacing a coil of the same model.

Three checks before installing it

• Available height. The cabinet is 30 in (762 mm) high. Above an upright furnace, this height comes on top of the cabinet’s own, under the basement ceiling.
• The vapor line. The coil connects with a 3/8 in liquid line and a 7/8 in vapor line. If the existing line has another diameter, we adapt or replace it.
• The side of a horizontal installation. Bosch publishes 1,800 CFM in horizontal left, but 1,500 CFM in horizontal right, and 1,700 CFM in downflow. When the cabinet lies horizontally, the chosen side matters.

Installation by our technicians

We start with a free on-site estimate to measure the cabinet, the space and the lines, and to confirm the outdoor unit. Since Bosch has discontinued this model, we also check availability before scheduling the work.

On the day, our technicians set the coil in the chosen position, seal the cabinet to the air handler and the ducts, and connect the condensate drain to the multi-position drain pan provided by Bosch. They then braze the lines, pull a vacuum, adjust the charge and commission the system. Bosch requires a TXV at the indoor coil to match its outdoor units; its setting is part of our start-up checks. The coil is all aluminum, a construction Bosch associates with better corrosion resistance.

A reminder: sold alone, a coil has no efficiency rating of its own and does not qualify for the LogisVert grant.

Ask for your estimate

AirGreen is a family business established in Montreal for more than fifteen years. We hold RBQ licence 5645-9605-01 in ventilation, refrigeration and electrical work. Contact us for a free on-site estimate and a written quote; financing is available.